How can I change UIButton title color? - ios

I create a button programmatically..........
button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self action:#selector(aMethod:)
forControlEvents:UIControlEventTouchDown];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[view addSubview:button];
how can I change title color?


You can use -[UIButton setTitleColor:forState:] to do this.
Example:
Objective-C
[buttonName setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
Swift 2
buttonName.setTitleColor(UIColor.blackColor(), forState: .Normal)
Swift 3
buttonName.setTitleColor(UIColor.white, for: .normal)
Thanks to richardchildan


You created the UIButton is added the ViewController, The following instance method to change UIFont, tintColor and TextColor of the UIButton
Objective-C
buttonName.titleLabel.font = [UIFont fontWithName:#"LuzSans-Book" size:15];
buttonName.tintColor = [UIColor purpleColor];
[buttonName setTitleColor:[UIColor purpleColor] forState:UIControlStateNormal];
Swift
buttonName.titleLabel.font = UIFont(name: "LuzSans-Book", size: 15)
buttonName.tintColor = UIColor.purpleColor()
buttonName.setTitleColor(UIColor.purpleColor(), forState: .Normal)
Swift3
buttonName.titleLabel?.font = UIFont(name: "LuzSans-Book", size: 15)
buttonName.tintColor = UIColor.purple
buttonName.setTitleColor(UIColor.purple, for: .normal)


Solution in Swift 3:
button.setTitleColor(UIColor.red, for: .normal)
This will set the title color of button.


With Swift 5, UIButton has a setTitleColor(_:for:) method. setTitleColor(_:for:) has the following declaration:
Sets the color of the title to use for the specified state.
func setTitleColor(_ color: UIColor?, for state: UIControlState)
The following Playground sample code show how to create a UIbutton in a UIViewController and change it's title color using setTitleColor(_:for:):
import UIKit
import PlaygroundSupport
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.white
// Create button
let button = UIButton(type: UIButton.ButtonType.system)
// Set button's attributes
button.setTitle("Print 0", for: UIControl.State.normal)
button.setTitleColor(UIColor.orange, for: UIControl.State.normal)
// Set button's frame
button.frame.origin = CGPoint(x: 100, y: 100)
button.sizeToFit()
// Add action to button
button.addTarget(self, action: #selector(printZero(_:)), for: UIControl.Event.touchUpInside)
// Add button to subView
view.addSubview(button)
}
#objc func printZero(_ sender: UIButton) {
print("0")
}
}
let controller = ViewController()
PlaygroundPage.current.liveView = controller


If you are using Swift, this will do the same:
buttonName.setTitleColor(UIColor.blackColor(), forState: .Normal)
Hope that helps!

Related

Text does not appear on UIButton in swift

Pounding my head against this. Should be so simple.
Running in a playground inside MyClass:
func configureButton(){
let btn: UIButton = UIButton(frame: CGRectMake(5, 75, 90, 20))
btn.backgroundColor = UIColor.greenColor()
btn.addTarget(self,
action: #selector(MyClass.buttonTapped),
forControlEvents: UIControlEvents.TouchUpInside)
addSubview(btn)
btn.setTitleColor(UIColor.blackColor(), forState: .Normal)
btn.titleLabel?.font = UIFont(name: "Helvetica", size: 40)
btn.titleLabel?.text = "tap me"
}
The button shows up green, and works when pressed, but does not display the text.

This line is just wrong:
btn.titleLabel?.text = "tap me"
Do not attempt to manipulate the button's title label text directly like this. Always pass through the button's official title setter, setTitle:forState:.

Change text color of UIButton in CalloutAccessoryView

I use this code to create a UIButton in my CalloutView.
var button = UIButton.buttonWithType(UIButtonType.System) as! UIButton
button.frame = CGRectMake(100, 100, 100, 50)
button.backgroundColor = UIColor.redColor()
button.setTitle("No", forState: UIControlState.Normal)
button.addTarget(self, action: "Action:", forControlEvents: UIControlEvents.TouchUpInside)
anView.rightCalloutAccessoryView = button
How can I change the text color of UIButton?

You can change the title/text color of a UIButton like so:
button.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)

How can I change the background color of a UIBarButtonItem on iOS 7+?

I'd like to indicate that a particular UIBarButtonItem is toggled on or off by changing its background color. Mobile Safari uses this feature to indicate whether private browsing is on or off:
How can I do this, since there's no backgroundColor property on UIBarButtonItem?

Create a UIButton and use it as the custom view for the UIBarButtonItem. Then, set the backgroundColor on the button's layer:
UIButton* button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:#"Test"];
button.layer.backgroundColor = [UIColor redColor].CGColor;
button.layer.cornerRadius = 4.0;
UIBarButtonItem* buttonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
self.toolbarItems = #[buttonItem];

You could instead just use two images. One for selected and one for unselected
- (void)setBackgroundImage:(UIImage *)backgroundImage forState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics
The above function should help you do this

Swift 5 Answer
let rightBarCancelButton = UIButton(frame: CGRect(x: 0, y: 0, width: 30, height: 30))
let cancelImage = UIImage(systemName: "multiply")
rightBarCancelButton.setImage(cancelImage, for: .normal)
rightBarCancelButton.layer.cornerRadius = 15
rightBarCancelButton.backgroundColor = UIColor.lightGray
let rightBarButton = UIBarButtonItem(customView: rightBarCancelButton)
navigationItem.rightBarButtonItem = rightBarButton
Works like a charm!

Add border in UIBarButtonItem

In my app, I have designed a view in the interface builder.
This view has a toolbar, with some UIBarButtonItem in.
My buttons can be custom images, or default button like share, add,...
Now with iOS7, buttons don't have anymore borders. So I'd like to add some.
Here is what i want to do : add borders like the white lines on my screenshot.
What I've tried is to add a UIButton to the toolbar. In my example, I've set my back button size (12x44). I add this button as a IBOutlet property of my view controller, and try to draw a border to it :
CALayer *cancelBorder = [CALayer layer];
[cancelBorder setFrame:CGRectMake(12, 0, 1, 44)];
[backBorder setBackgroundColor:[[UIColor whiteColor] CGColor]];
[backButton.layer addSublayer:cancelBorder];
But it doesn't work. Anyone has a solution?

Adding UIBarButtonItem to toolbar programmatically may solve your problem.
First, create custom button with images, borders, etc. As HereTrix said, you can add border to this button.
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(10, 0, 30, 30);
button.layer.borderColor = [UIColor blueColor].CGColor;
button.layer.borderWidth = 1.0f;
/* any other button customization */
Then, initialize UIBarButtonItem with that custom button and add this item to your toolbar.
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:button];
self.toolBar.items = #[backButton];

Swift 3 : Below is my full implementation for button customization and event handling.
override func viewDidLoad() {
super.viewDidLoad()
let button = UIButton.init(type: .custom)
button.setTitle("Tester", for: .normal)
button.setTitleColor(.darkGray, for: .normal)
button.layer.borderWidth = 1
button.layer.cornerRadius = 5
button.layer.borderColor = UIColor.darkGray.cgColor
button.addTarget(self, action: #selector(self.handleButton), for: .touchUpInside)
self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: button)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
if let button = self.navigationItem.rightBarButtonItem?.customView {
button.frame = CGRect(x:0, y:0, width:80, height:34)
}
}
func handleButton( sender : UIButton ) {
// It would be nice is isEnabled worked...
sender.alpha = sender.alpha == 1.0 ? 0.5 : 1.0
}
Hope this helps

How do I create a basic UIButton programmatically?

How can I create a basic UIButton programmatically? For example in my view controller, when executing the viewDidLoad method, three UIButtons will be created dynamically and its layout or properties are set.

Here's one:
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button addTarget:self
action:#selector(aMethod:)
forControlEvents:UIControlEventTouchUpInside];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[view addSubview:button];

Objective-C
UIButton *but= [UIButton buttonWithType:UIButtonTypeRoundedRect];
[but addTarget:self action:#selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
[but setFrame:CGRectMake(52, 252, 215, 40)];
[but setTitle:#"Login" forState:UIControlStateNormal];
[but setExclusiveTouch:YES];
// if you like to add backgroundImage else no need
[but setbackgroundImage:[UIImage imageNamed:#"XXX.png"] forState:UIControlStateNormal];
[self.view addSubview:but];
-(void) buttonClicked:(UIButton*)sender
{
NSLog(#"you clicked on button %#", sender.tag);
}
Swift
let myButton = UIButton() // if you want to set the type use like UIButton(type: .RoundedRect) or UIButton(type: .Custom)
myButton.setTitle("Hai Touch Me", forState: .Normal)
myButton.setTitleColor(UIColor.blueColor(), forState: .Normal)
myButton.frame = CGRectMake(15, 50, 300, 500)
myButton.addTarget(self, action: "pressedAction:", forControlEvents: .TouchUpInside)
self.view.addSubview( myButton)
func pressedAction(sender: UIButton!) {
// do your stuff here
NSLog("you clicked on button %#", sender.tag)
}
Swift3 and above
let myButton = UIButton() // if you want to set the type use like UIButton(type: .RoundedRect) or UIButton(type: .Custom)
myButton.setTitle("Hi, Click me", for: .normal)
myButton.setTitleColor(UIColor.blue, for: .normal)
myButton.frame = CGRect(x: 15, y: 50, width: 300, height: 500)
myButton.addTarget(self, action: #selector(pressedAction(_:)), for: .touchUpInside)
self.view.addSubview( myButton)
func pressedAction(_ sender: UIButton) {
// do your stuff here
print("you clicked on button \(sender.tag)")
}
SwiftUI
for example you get the step by step implemntation from SwiftUI Developer portal
import SwiftUI
struct ContentView : View {
var body: some View {
VStack {
Text("Target Color Black")
Button(action: {
/* handle button action here */ })
{
Text("your Button Name")
.color(.white)
.padding(10)
.background(Color.blue)
.cornerRadius(5)
.shadow(radius: 5)
.clipShape(RoundedRectangle(cornerRadius: 5))
}
}
}
}
#if DEBUG
struct ContentView_Previews : PreviewProvider {
static var previews: some View {
ContentView()
}
}
#endif

- (void)viewDidLoad {
[super viewDidLoad];
[self addMyButton]; // Call add button method on view load
}
- (void)addMyButton{ // Method for creating button, with background image and other properties
UIButton *playButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
playButton.frame = CGRectMake(110.0, 360.0, 100.0, 30.0);
[playButton setTitle:#"Play" forState:UIControlStateNormal];
playButton.backgroundColor = [UIColor clearColor];
[playButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal ];
UIImage *buttonImageNormal = [UIImage imageNamed:#"blueButton.png"];
UIImage *strechableButtonImageNormal = [buttonImageNormal stretchableImageWithLeftCapWidth:12 topCapHeight:0];
[playButton setBackgroundImage:strechableButtonImageNormal forState:UIControlStateNormal];
UIImage *buttonImagePressed = [UIImage imageNamed:#"whiteButton.png"];
UIImage *strechableButtonImagePressed = [buttonImagePressed stretchableImageWithLeftCapWidth:12 topCapHeight:0];
[playButton setBackgroundImage:strechableButtonImagePressed forState:UIControlStateHighlighted];
[playButton addTarget:self action:#selector(playAction:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:playButton];
}

To add a button programatically to your controller's view, use the following:
-(void)viewDidLoad
{
UIButton * btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btn.frame = CGRectMake(0, 0, 100, 50);
[btn setTitle:#"Hello, world!" forState:UIControlStateNormal];
[self.view addSubview:btn];
}
To add three of these, rinse and repeat.

Here you can create dynamically a UIButton:
//For button image
UIImage *closebtnimg = [UIImage imageNamed:#"close_btn.png"];
//Custom type button
btnclose = [[UIButton buttonWithType:UIButtonTypeCustom]retain];
//Set frame of button means position
btnclose.frame = CGRectMake(103, 257, 94, 32);
//Button with 0 border so it's shape like image shape
[btnclose.layer setBorderWidth:0];
//Set title of button
[btnclose setTitle:#"CLOSE" forState:UIControlStateNormal];
[btnclose addTarget:self action:#selector(methodname:) forControlEvents:UIControlEventTouchUpInside];
//Font size of title
btnclose.titleLabel.font = [UIFont boldSystemFontOfSize:14];
//Set image of button
[btnclose setBackgroundImage:closebtnimg forState:UIControlStateNormal];

Come on, it's 2014! Why isn't code block evaluation assignment being used yet, as trends show it's the future!
UIButton* button = ({
//initialize button with frame
UIButton* button = [[UIButton alloc] initWithFrame:({
CGRect frame = CGRectMake(10.0, 10.0, 200.0, 75.0);
frame;
})];
//set button background color
[button setBackgroundColor:({
UIColor* color = [UIColor colorWithRed:1.0 green:1.0 blue:0.0 alpha:1.0];
color;
})];
//set button title for state
[button setTitle:({
NSString* string = [NSString stringWithFormat:#"title words"];
string;
}) forState:({
UIControlState state = UIControlStateNormal;
state;
})];
//set selector
[button addTarget:self action:({
SEL select = #selector(method:);
select;
}) forControlEvents:({
UIControlEvents event = UIControlEventTouchUpInside;
event;
})];
//return button
button;
});
[self.view addSubview:button];
whoa!
Or the exact results can be accomplished as such:
UIButton* button = [[UIButton alloc] initWithFrame:CGRectMake(10.0, 10.0, 200.0, 75.0)];
[button setBackgroundColor:[UIColor colorWithRed:1.0 green:1.0 blue:0.0 alpha:1.0]];
[button setTitle:#"title words" forState:UIControlStateNormal];
[button addTarget:self action:#selector(method:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];

'action:#selector(aMethod:)' write method like this :
- (void)aMethod:(UIButton*)button
{
NSLog(#"Button clicked.");
}
It works for me. Thanks. KS.

Objective-C
// Create the Button with RoundedRect type
UIButton *mybutton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
// instend of "Click Me" you can write your own message/Label
[mybutton setTitle:#"Click Me" forState:UIControlStateNormal];
// create the Rectangle Frame with specified size
mybutton.frame = CGRectMake(10, 10, 300, 140); // x,y,width,height [self.view addSubview:mybutton];// add button to your view.
Swift
let button = UIButton(type: UIButtonType.System) as UIButton
button.frame = CGRectMake(100, 100, 100, 50)
button.backgroundColor = UIColor.greenColor()
button.setTitle("Test Button", forState: UIControlState.Normal)
self.view.addSubview(button)

try this code to create a button and repeat it for 2 more times with different coordinates and the method(myButtonClick) is called when the button is pressed
UIButton *editButton = [UIButton buttonWithType: UIButtonTypeCustom];
editButton.frame = CGRectMake(0, 0, width, height);
[editButton setBackgroundImage: editButtonImage forState: UIControlStateNormal];
[myButton addTarget:self action:#selector(myButtonClick:) forControlEvents:UIControlEventTouchUpInside];
editButton.adjustsImageWhenHighlighted = YES;
editButton.titleLabel.text = #"Edit";
editButton.titleLabel.textColor = [UIColor whiteColor];
editButton.titleLabel.textAlignment = UITextAlignmentCenter;
editButton.titleLabel.font = [UIFont fontWithName: #"Helvetica" size: 14];
[self.view addSubview: editButton];
-(void) myButtonClick:(NSString *)myString{
NSLog(#"you clicked on button %#", myString);
}

Check out this code:
Swift 4.2
let frameimg = CGRect(x: 15, y: 46, width: 55, height: 70)
let btnTest = UIButton(type: .roundedRect)
btnTest.frame = frameimg
btnTest.tag = 11
btnTest.setTitle("Test Button", for: .normal)
btnTest.addTarget(self, action: #selector(self.buttonAction(sender:)), for: .touchUpInside)
btnTest.titleLabel?.font = UIFont.boldSystemFont(ofSize: 12.0)
btnTest.titleLabel?.lineBreakMode = .byWordWrapping
btnTest.titleLabel?.numberOfLines = 2
btnTest.titleLabel?.textAlignment = .center
btnTest.setTitleColor(UIColor.gray, for: .normal)
btnTest.setTitleColor(UIColor.blue, for: .selected)
btnTest.showsTouchWhenHighlighted = true
view.addSubview(btnTest)
Objective C
CGRect frameimg = CGRectMake(15, 46, 55,70);
UIButton *SelectionButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
SelectionButton.frame=frameimg;
SelectionButton.tag=i;
[SelectionButton setTitle:[SelectionArray objectAtIndex:0] forState:UIControlStateNormal];
[SelectionButton addTarget:self action:#selector(BtnSelected:)
forControlEvents:UIControlEventTouchUpInside];
[SelectionButton.titleLabel setFont:[UIFont boldSystemFontOfSize:12.0]];
SelectionButton.titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
SelectionButton.titleLabel.numberOfLines = 2;
SelectionButton.titleLabel.textAlignment = NSTextAlignmentCenter;
[SelectionButton setTitleColor:[UIColor grayColor] forState:(UIControlStateNormal)];
[SelectionButton setTitleColor:[UIColor blueColor] forState:UIControlStateSelected];
[SelectionButton setShowsTouchWhenHighlighted:YES];
[self.view addSubview:SelectionButton];
I hope this code will work for you.

You can just put the creator instance within a loop and dynamically add names from an array if you so wish.

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self
action:#selector(aMethod:)
forControlEvents:UIControlEventTouchUpInside];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(10.0, 100.0, 300.0, 20.0);
[self.view addSubview:button];

-(UIButton *)addButton:(NSString *)title :(CGRect)frame : (SEL)selector :(UIImage *)image :(int)tag{
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = frame;
[btn addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside];
[btn setTitle:title forState:UIControlStateNormal];
[btn setImage:image forState:UIControlStateNormal];
btn.backgroundColor = [UIColor clearColor];
btn.tag = tag;
return btn;
}
and you can add it to the view:
[self.view addSubview:[self addButton:nil :self.view.frame :#selector(btnAction:) :[UIImage imageNamed:#"img.png"] :1]];

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self
action:#selector(aMethod:)
forControlEvents:UIControlEventTouchDown];
[button setTitle:#"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[view addSubview:button];

This is an example as well to create three buttons. Just move their location.
UIImage *buttonOff = [UIImage imageNamed:#"crysBallNorm.png"];
UIImage *buttonOn = [UIImage imageNamed:#"crysBallHigh.png"];
UIButton *predictButton = [UIButton alloc];
predictButton = [UIButton buttonWithType:UIButtonTypeCustom];
predictButton.frame = CGRectMake(180.0, 510.0, 120.0, 30.0);
[predictButton setBackgroundImage:buttonOff forState:UIControlStateNormal];
[predictButton setBackgroundImage:buttonOn forState:UIControlStateHighlighted];
[predictButton setTitle:#"Predict" forState:UIControlStateNormal];
[predictButton setTitleColor:[UIColor purpleColor] forState:UIControlStateNormal];
[predictButton addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:predictButton];

You can create button by this code.
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn addTarget:self action:#selector(btnAction) forControlEvents:UIControlEventTouchDragInside];
[btn setTitle:#"click button" forState:UIControlStateNormal];
btn.frame = CGRectMake(50, 100, 80, 40);
[self.view addSubview:btn];
Here is the button action method
-(void)btnAction
{
NSLog(#"button clicked");
}

For Swift 2.0:
let btnObject : UIButton = UIButton()
btnObject.frame = CGRect(x: 8, y: 89, width: 70, height: 22)
btnObject.titleLabel?.font = UIFont(name: "Helvetica Neue", size: 13)
btnObject.titleLabel?.textColor = UIColor.whiteColor()
btnObject.backgroundColor = UIColor(red: 189/255, green: 176/255, blue: 0/255, alpha: 1)
btnObject.titleLabel?.textAlignment = NSTextAlignment.Center
btnObject.addTarget(self, action: "btnbtnObjectClick:", forControlEvents: UIControlEvents.TouchUpInside)
subView.addSubview(btnObject)

For creating UIButton programmatically we can create in both objective c and swift
SWIFT 3
let buttonSwift = UIButton(type: UIButtonType.system) as UIButton
//OR
let buttonSwift = UIButton(type: UIButtonType.Custom) as UIButton
//Set Frame for Button
buttonSwift.frame = CGRect(x: 100, y: 100, width: 200, height: 100)
//Set title for button
buttonSwift.setTitle("ClickMe", for: .normal)
//If you want to set color for button title
buttonSwift.setTitleColor(UIColor.white, for: .normal)
//If you want to set Background color for button
buttonSwift.backgroundColor = UIColor.black
//If you want to set tag for button
buttonSwift.tag = 0
//If you want to add or set image for button
let image = UIImage(named: "YourImageName") as UIImage?
buttonSwift.setImage(image, for: .normal)
//If you want to add or set Background image for button
buttonSwift.setBackgroundImage(image, for: .normal)
//Add action for button
buttonSwift.addTarget(self, action: #selector(actionPressMe), for:.touchUpInside)
//Add button as SubView to Super View
self.view.addSubview(buttonSwift)
UIButton Action Method
func actionPressMe(sender: UIButton!)
{
NSLog("Clicked button tag is %#", sender.tag)
OR
print("Clicked button tag is \(sender.tag)")
//Then do whatever you want to do here
........
}
OBJECTIVE C
UIButton *buttonObjectiveC = [UIButton buttonWithType:UIButtonTypeCustom];
OR
UIButton *buttonObjectiveC = [UIButton buttonWithType:UIButtonTypeSystem];
buttonObjectiveC.frame = CGRectMake(200, 100, 200, 100);
//Set title for button
[buttonObjectiveC setTitle:#"ClickMe" forState:UIControlStateNormal];
//If you want to set color for button title
[buttonObjectiveC setTitleColor:[UIColor whiteColor] forState: UIControlStateNormal];
//If you want to set Background color for button
[buttonObjectiveC setBackgroundColor:[UIColor blackColor]];
//If you want to set tag for button
buttonSwift.tag = 0;
//If you want to add or set image for button
UIImage *image = [UIImage imageNamed:#"YourImageName"];
[buttonObjectiveC setImage:image forState:UIControlStateNormal];
//If you want to add or set Background image for button
[buttonObjectiveC setBackgroundImage:image forState:UIControlStateNormal];
//Add action for button
[buttonObjectiveC addTarget:self action:#selector(actionPressMe:)forControlEvents:UIControlEventTouchUpInside];
//Add button as SubView to Super View
[self.view addSubview:buttonObjectiveC];
UIButton Action Method
- (void)actionPressMe:(UIButton *)sender
{
NSLog(#"Clicked button tag is %#",sender.tag);
//Then do whatever you want to do here
..........
}
Output Screenshot is

Try it....
UIButton *finalPriceBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];
finalPriceBtn.frame=CGRectMake(260, 25, 45, 15);
[finalPriceBtn addTarget:self action:#selector(goBtnClk:) forControlEvents:UIControlEventTouchUpInside];
finalPriceBtn.titleLabel.font=[UIFont systemFontOfSize:12];
[finalPriceBtn setTitle:[NSString stringWithFormat:#"$%.2f",tempVal] forState:UIControlStateNormal];
finalPriceBtn.titleLabel.textColor = [UIColor colorWithRed: 2.0f/255.0f green: 155.0f/255.0f blue: 213.0f/255.0f alpha:1];
finalPriceBtn.titleLabel.textAlignment=UITextAlignmentLeft;
[imageView addSubview:finalPriceBtn];
Hope i helped.

-(void)addStuffToView
{
UIButton *aButton = [[UIButton alloc] initWithFrame:CGRectMake(20, 20, 20, 20)]; //(x, y, width, height of button on screen
[aButton setTitle:#"Button" forState:UIControlStateNormal];//puts the text on the button
aButton.titleLabel.font = somefont;//sets the font if one is already stated
aButton.titleLabel.font = [UIFont fontWithName:#"Arial-MT" size:12];//sets the font type and size
[aButton addTarget:self action:#selector(back) forControlEvents:UIControlEventTouchUpInside];//see back method below
[aButton setBackgroundImage:[UIImage imageNamed:#"someImage.png"] forState:UIControlStateNormal];//sets the image of the button
[self.view addSubview:back];
}
-(void)back
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle.....]
}
-(void)viewDidLoad
{
[super viewDidLoad];
[self addStuffToView];//adds all items built in this method to the view
}

For Swift 2.2 (with the with the new "selector" declaration).
let btn = UIButton(type: UIButtonType.System) as UIButton
btn.frame = CGRectMake(0, 0, 100, 20) // set any frame you want
btn.setTitle("MyAction", forState: UIControlState.Normal)
btn.addTarget(self, action: #selector(MyClass.myAction(_:)), forControlEvents: UIControlEvents.TouchUpInside)
self.view.addSubview(btn)
func myAction(sender:UIButton!){
// Some action
}

You can implement it in your ViewDidLoad Method:
continuebtn = [[UIButton alloc]initWithFrame:CGRectMake(10, 100, view1.frame.size.width-20, 40)];
[continuebtn setBackgroundColor:[UIColor grayColor]];
[continuebtn setTitle:#"Continue" forState:UIControlStateNormal];
continuebtn.layer.cornerRadius = 10;
continuebtn.layer.borderWidth =1.0;
continuebtn.layer.borderColor = [UIColor blackColor].CGColor;
[continuebtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[continuebtn addTarget:self action:#selector(continuetonext) forControlEvents:UIControlEventTouchUpInside];
[view1 addSubview:continuebtn];
Where continuetonext is:
-(void)continuetonext
{
GeneratePasswordVC *u = [[GeneratePasswordVC alloc]init];
[self.navigationController pushViewController:u animated:YES];
}

As of Swift 3, several changes have been made to the syntax.
Here is how you would go about creating a basic button as of Swift 3:
let button = UIButton(type: UIButtonType.system) as UIButton
button.frame = CGRect(x: 100, y: 100, width: 100, height: 50)
button.backgroundColor = UIColor.green
button.setTitle("Example Button", for: UIControlState.normal)
self.view.addSubview(button)
Here are the changes that have been made since previous versions of Swift:
let button = UIButton(type: UIButtonType.System) as UIButton
// system no longer capitalised
button.frame = CGRectMake(100, 100, 100, 50)
// CGRectMake has been removed as of Swift 3
button.backgroundColor = UIColor.greenColor()
// greenColor replaced with green
button.setTitle("Example Button", forState: UIControlState.Normal)
// normal is no longer capitalised
self.view.addSubview(button)

UIButton *custombutton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[custombutton addTarget:self
action:#selector(aMethod:)
forControlEvents:UIControlEventTouchUpInside];
[custombutton setTitle:#"Click" forState:UIControlStateNormal];
custombutton.frame = CGRectMake(80.0, 110.0, 160.0, 40.0);
custombutton.titleLabel.textColor = [UIColor colorWithRed: 2.0f/255.0f green: 155.0f/255.0f blue: 213.0f/255.0f alpha:1];
[custombutton setImage:[UIImage imageNamed:#"hh.png"] forState:UIControlStateNormal];
[view addSubview:custombutton];

try this:
first write this in your .h file of viewcontroller
UIButton *btn;
Now write this in your .m file of viewcontrollers viewDidLoad.
btn=[[UIButton alloc]initWithFrame:CGRectMake(50, 20, 30, 30)];
[btn setBackgroundColor:[UIColor orangeColor]];
[btn setTitle: #"My Button" forState:UIControlStateNormal];
[btn setTitleColor: [UIColor blueVolor] forState:UIControlStateNormal];
[btn.layer setBorderWidth:1.0f];
[btn.layer setBorderColor:[UIColor BlueVolor].CGColor];
//adding action programatically
[btn addTarget:self action:#selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
write this outside viewDidLoad method in .m file of your view controller
- (IBAction)btnClicked:(id)sender
{
//Write a code you want to execute on buttons click event
}

For Swift 3 (even shorter code)
let button = UIButton(type: UIButtonType.custom)
button.frame = CGRect(x: 0, y: 0, width: 200.0, height: 40.0)
button.addTarget(nil, action: #selector(tapButton(_:)), for: UIControlEvents.touchUpInside)
button.tintColor = UIColor.white
button.backgroundColor = UIColor.red
button.setBackgroundImage(UIImage(named: "ImageName"), for: UIControlState.normal)
button.setTitle("MyTitle", for: UIControlState.normal)
button.isEnabled = true
func tapButton(sender: UIButton) {
}

UIButton *buttonName = [UIButton
buttonWithType:UIButtonTypeRoundedRect];
[buttonName addTarget:self
action:#selector(aMethod:)forControlEvents:UIControlEventTouchDown];
[buttonName setTitle:#"Show View" forState:UIControlStateNormal];
.frame = CGRectMake(80.0, 210.0, 160.0, 40.0); [view
addSubview:buttonName];

In Swift 5 and Xcode 10.2
Basically we have two types of buttons.
1) System type button
2) Custom type button (In custom type button we can set background image for button)
And these two types of buttons has few control states https://developer.apple.com/documentation/uikit/uicontrol/state
Important states are
1) Normal state
2) Selected state
3) Highlighted state
4) Disabled state etc...
//For system type button
let button = UIButton(type: .system)
button.frame = CGRect(x: 100, y: 250, width: 100, height: 50)
// button.backgroundColor = .blue
button.setTitle("Button", for: .normal)
button.setTitleColor(.white, for: .normal)
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 13.0)
button.titleLabel?.textAlignment = .center//Text alighment center
button.titleLabel?.numberOfLines = 0//To display multiple lines in UIButton
button.titleLabel?.lineBreakMode = .byWordWrapping//By word wrapping
button.tag = 1//To assign tag value
button.btnProperties()//Call UIButton properties from extension function
button.addTarget(self, action:#selector(self.buttonClicked), for: .touchUpInside)
self.view.addSubview(button)
//For custom type button (add image to your button)
let button2 = UIButton(type: .custom)
button2.frame = CGRect(x: 100, y: 400, width: 100, height: 50)
// button2.backgroundColor = .blue
button2.setImage(UIImage.init(named: "img.png"), for: .normal)
button2.tag = 2
button2.btnProperties()//Call UIButton properties from extension function
button2.addTarget(self, action:#selector(self.buttonClicked), for: .touchUpInside)
self.view.addSubview(button2)
#objc func buttonClicked(sender:UIButton) {
print("Button \(sender.tag) clicked")
}
//You can add UIButton properties using extension
extension UIButton {
func btnProperties() {
layer.cornerRadius = 10//Set button corner radious
clipsToBounds = true
backgroundColor = .blue//Set background colour
//titleLabel?.textAlignment = .center//add properties like this
}
}

The Swift 3 version should be:
let myButton:UIButton = {
let myButton = UIButton() // If you want to set the type use like
// UIButton(type: .RoundedRect) or
// UIButton(type: .Custom)
myButton.setTitle("Hai Touch Me", for: .normal)
myButton.setTitleColor(UIColor.blue, for: .normal)
myButton.frame = CGRect(x: 20, y: 20, width: 100, height: 40)
myButton.addTarget(self, action: #selector(ViewController.pressedAction(_:)), for: .touchUpInside)
self.view.addSubview(myButton)
return myButton
}()

UIButton *btnname = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[btnname setTitle:#"Click Me" forState:UIControlStateNormal];
btnname.frame = CGRectMake(10, 10, 100, 140);
[self.view addSubview:btnname];

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