I have a UIButton as an action. I would like to set a dynamic url and also a dynamic text (on view load, not on click) to it eventually.
#IBAction func openUrl(sender: UIButton) {
sender.setTitle("Hello World", forState: .Normal)
UIApplication.sharedApplication().openURL(NSURL(string: "http://www.google.com")!)
}
The above code is working, but the button title changes to "Hello World" only after clicking it.
Override viewDidLoad and set the title there. Also, create an outlet to the button if you haven't already:
override func viewDidLoad() {
super.viewDidLoad()
yourButtonOutlet.setTitle("Hello World", forState: .Normal)
}
Remove the setTitle() line from the IBAction.
This will set the title of your button when the view loads for your controller.
I think you need to implement application(_:openURL:options:) in your AppDelegate. That is the method that responds to the opening of that URL. You might also want to wrap your opening call with canOpenURL: to prevent this error from happening.
//For change title of button at time of view loading :
override func viewDidLoad() {
super.viewDidLoad()
yourButtonOutlet.setTitle("Hello World", forState: .Normal)
}
//For open Link:
#IBAction func openLink(sender:UIButton){
var url = NSURL(string: "http://www.google.com")
if UIApplication.sharedApplication().canOpenURL(url!) == true {
UIApplication.sharedApplication().openURL(url!)
}
}
Related
I created a UIButton within a for-loop because the number of these button depend on a certain number in the database. However, I have to change the image of this button after it is clicked, which doesn't work.
What I have done is I tried holding an array of those buttons and trying to access the buttons like that, which I don't think is not working.
let buttonArray: [UIButton] = [UIButton]()
...extra code
for (index, num) in numberOfButtonsNeeded.enumerated() {
let button = UIButton()
button.tag = index
button.addTarget(self, action: #selector(self.tap(sender:)), for: .touchUpInside)
buttonArray.append(button)
}
...
#objc func tap(sender: UIButton) {
DispatchQueue.main.asnyc{
buttonArray[sender.tag].setImage(UIImage(named:"Somename"))
}
}
I can access the tap gesture but this button's image won't be reset. Is there a way I can access the button? I do not think this array works.
This is suspect:
#objc func tap(sender: UIButton) {
DispatchQueue.main.asnyc{
buttonArray[sender.tag].setImage(UIImage(named:"Somename"))
}
You are already on the main queue, and the sender is the button that was tapped. So you don't need the array.
#objc func tap(sender: UIButton) {
sender.setImage(UIImage(named:"Somename"))
}
I have a button with icon, I want when pressed button icon fill with color and when pressed again empty color and return to the previous state
Note: As much as possible I do not want to change icon after every pressed.
Here is example how you can achieve that, let me know if you don’t understand something.
class ViewController: UIViewController {
#IBOutlet weak var someBtn: UIButton!
override func viewDidLoad() {
super.viewDidLoad()
configureUI()
}
//Setting up images for normal and selected state.
func configureUI() {
let image = UIImage(named: "image")
let imageFilled = UIImage(named: "image-filled")
someBtn.setImage(image, for: .normal)
someBtn.setImage(imageFilled, for: .selected)
}
#IBAction func someBtnPressed(_ sender: Any) {
// Toggle basically makes someBtn’s selected state either true or false when pressed
someBtn.isSelected.toggle()
}
}
You can call setImage(_:for:) method to set the image of the button for a particular state.
The button is at the normal state when the user is not pressing it, so you should do:
yourButton.setImage(hollowHeart, for: .normal)
The button is at the highlighted state when the user is touching it, so you should do:
yourButton.setImage(filledHeart, for: .highlighted)
You just need to do this once after you create the button, probably in viewDidLoad.
I want to create tappable text when I tap on those text then fire some action like call any function do some operation of that text I catnap on any text not on whole uitextview
Try this -
override func viewDidLoad() {
super.viewDidLoad()
// You must set the formatting of the link manually
let linkAttributes: [NSAttributedStringKey: Any] = [
.link: NSURL(string: "https://www.apple.com")!,
.foregroundColor: UIColor.blue
]
let attributedString = NSMutableAttributedString(string: "Just click here to register")
// Set the 'click here' substring to be the link
attributedString.setAttributes(linkAttributes, range: NSMakeRange(5, 10))
self.textView.delegate = self
self.textView.attributedText = attributedString
self.textView.isUserInteractionEnabled = true
self.textView.isEditable = false
}
If I understand your question correctly, you want to click on a text view and call a function. You can use UITapGestureRecognizer.
#IBOutlet weak var textView: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
textView.isUserInteractionEnabled = true
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(labelTapped))
textView.addGestureRecognizer(tapGestureRecognizer)
}
#objc func labelTapped(){
print("Do something")
}
I've faced with problem same like your and I've tried many things to resolve. The best approach will be use Atributika (or similar) library. You will not regret this decision. It's easy to use and have a lot features.
https://github.com/psharanda/Atributika
If I understand your question properly then you could just add a button then change the button text to the text you want. Then like normal text you can mess with the colour, border or fill. After you have added this to your app link it up as an action with your view controller.swift file
Here is an example from my app 'Health Dash':
Image 1
Image 2
Then the swift 4 code:
import UIKit
class FriendsViewController: UIViewController {
#IBAction func exampleText(_ sender: Any) {
print("When you click this button something happens")
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
}
Here is an image of what it should look like:
Image 3
I'm a beginner of swift. I have 4 buttons in my view. I want to change selected buttons background property to show user. Could you please help me thanks.
If wanted them all to be the same color, you could connect them as an IBOutlet Collection and then iterate through them using a for in loop and setting their backgroundColor properties.
for button in buttons {
button.backgroundColor = UIColor.lightGreyColor()
}
Additionally if you wanted to set the color for states you can use these methods:
#IBAction func buttonClicked(sender: AnyObject) { //Touch Up Inside action
button.backgroundColor = UIColor.whiteColor()
}
#IBAction func buttonReleased(sender: AnyObject) { //Touch Down action
button.backgroundColor = UIColor.blueColor()
}
Basically, I have a three buttons on my main screen.
When I select one of these buttons, I would like the text on the selected button to change to bold and change color (blue).
When I select a different button, I would like the newly selected button to change to bold and change color(blue), and the previously selected button to go back to normal. (non-bold and black text)
I have these buttons sending an action to the script.
This is what I have, I can't seem to get it to work. Help would be much appreciated!
#IBAction func buttonOne(sender: UIButton){
sender.setTitleColor(UIColor.blueColor(), forState: UIControlState.Highlighted)
}
I have tried .Highlighted and .Selected on the UIControlState, neither seem to work. I have also tried the following, but I cant get it to work.
#IBAction func buttonOne(sender: UIButton){
sender.titleLabel?.textColor = UIColor.blueColor()
}
I figured that since the sender was a UIButton, and it was the button that was clicked, taking the values off of it and resetting them would work. I do believe I am missing something.
Thank you
Sounds like you want UIControlState.Normal
Selected does nothing in most cases, and Highlighted is only while you're pressing the button.
See more info here: https://developer.apple.com/library/ios/documentation/uikit/reference/uicontrol_class/index.html#//apple_ref/doc/constant_group/Control_State
Maybe you can do with a transform...
#IBAction func buttonPressed(sender: UIButton) {
sender.titleLabel!.textColor = UIColor.blueColor()
sender.transform = CGAffineTransformMakeScale(0.8, 0.8)
}
#IBAction func buttonReleased(sender: UIButton) {
sender.titleLabel!.textColor = UIColor.redColor()
sender.transform = CGAffineTransformIdentity
}
Provide tags to all buttons, connect each button actions to same function and try the following code:
#IBAction func butnClicked (sender : UIButton) {
for tg in 1...2 {
print(sender.tag)
let tmpButton = self.view.viewWithTag(tg) as? UIButton
if tmpButton?.tag == sender.tag {
tmpButton?.setTitleColor(.red, for: .normal)
} else {
tmpButton?.setTitleColor(.gray, for: .normal)
}
}
Hope will be helping.