How can I set the title text of a button without using inside viewDidLoad? I know how to set the title text of a button:
[button setTitle:#"Title" forState:UIControlStateNormal];
But I want to set the title text outside viewDidLoad.
Please create an IBOutlet of UIButton set title in the xib/storyboard
Related
I create a class RadioButton that inherited from UIButton ,and rewrite the method layoutSubViews where reset the frame of self.imageView and self.titleLabel ,when I call the method setImage:forState: of RadioButton instance,it does not work, but the method radioButton.imageView.image = [UIImage imageNamed:#""] work. It is an interesting problem ,I appreciate so much if anyone know why and share the reason .
When we set title,image for button we need to use below code
For Button
[button setTitle:#"Your Title" forState:UIControlStateNormal];
For Image
[button setImage:[UIImage imageNamed:#"Your Image Name"] forState:UIControlStateNormal];
why should not we use titleLabel
Do not use the label object to set the text color or the shadow color.
Instead, use the setTitleColor:forState: and
setTitleShadowColor:forState: methods of this class to make those
changes.
The titleLabel property returns a value even if the button has not
been displayed yet. The value of the property is nil for system
buttons.
why should we use setTitle
Use this method to set the title for the button. The title you
specify derives its formatting from the button’s associated label
object. If you set both a title and an attributed title for the
button, the button prefers the use of the attributed title over this
one.
At a minimum, you should set the value for the normal state. If a
title is not specified for a state, the default behavior is to use the
title associated with the UIControlStateNormal state. If the value for
UIControlStateNormal is not set, then the property defaults to a
system value.
For Image
I have a UITextField for search in my Application.
When user taps on the Clear Button in the right of the Search Text Field I need to hide this textfield.
So, can I show the Clear Button then TextField is empty? I need to do it always to provide the ability hiding TextField.
Just create a Custom button and set it as rightView for your TextField
UIButton *cleanBtn = [UIButton buttonWithType:UIButtonTypeCustom];
// Set clear image for your button
[cleanBtn setImage:img forState:UIControlStateNormal];
[cleanBtn addTarget:self action:#selector(cleanTextField:) forControlEvents:UIControlEventTouchUpInside];
yourTextField.rightViewMode = UITextFieldViewModeAlways;
yourTextField.rightView = cleanBtn;
I tried to fix this issue with creating a custom button and setting the rightView of my text field. It did not solve my problem. There is no button on the right view.
I have added UIButton in Interface Builder using Auto Layout and placed it on my text field. It works. It's strange solution but it works.
I know with a UIButton, I can add additional UILabels as subviews:
[myButton addSubview: myLabel];
And (at least, with the default title label) I can set its text color when tapped by using:
[myButton setTitleColor:someColor forState:UIControlStateHighlighted]
My question is, how can I implement this functionality for additional UILabels added to the UIButton (if this is possible)?
Subclass UIButton and add your additional labels in there as instance variables. Then override -setHighlighted and -setSelected to adjust the additional labels as desired.
FYI - you call [myButton setTitleColor...], not [myButton.titleLabel setTitleColor...]
It seems my way of going about it isn't easy, but I realized I can just add an action to the UIButton for the event UITouchDown, and change the labels accordingly in the action.
You would have to set myLabels text color, before you added it as a subView.
Otherwise, you'll have to enumerate through the button's subviews and change each of your added label's text colors.
Update:
You can change the button title's font as follows:
myButton.titleLabel!.font = UIFont(name: "...", 10)
You can change the button's title color as follows:
colorsBtn.setTitleColor(UIColor.brownColor(), forState: UIControlState.Highlighted)
I have a uitbutton within a custom table cell. I am trying to set the buttons image with
[cell.thumbImage setImage:[UIImage imageNamed: #"full_breakfast.jpg"] forState:UIControlStateNormal];
It is displaying a blue button instead of the image like so:
Am I doing this wrong? When i remove the uibutton setImage it returns to the normal button. This SHOULD be fairly simple so sorry if it is.
In iOS7 there is new button type called UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0), // standard system button
Check your .xib file and change button type to Custom, or programatically you can do this:
[UIButton buttonWithType:UIButtonTypeSystem];
How can I add a clear button (cross inside a circle) for UITextView like UITextField has?
Based on the answer from GhostRider a more accurate and up to date implementation:
int kClearButtonWidth = 15;
int kClearButtonHeight = kClearButtonWidth;
//add the clear button
self.clearButton = [UIButton buttonWithType:UIButtonTypeCustom];
[self.clearButton setImage:[UIImage imageNamed:#"UITextFieldClearButton.png"] forState:UIControlStateNormal];
[self.clearButton setImage:[UIImage imageNamed:#"UITextFieldClearButtonPressed.png"] forState:UIControlStateHighlighted];
self.clearButton.frame = CGRectMake(0, 0, kClearButtonWidth, kClearButtonHeight);
self.clearButton.center = CGPointMake(self.textView.frame.size.width - kClearButtonWidth , kClearButtonHeight);
[self.clearButton addTarget:self action:#selector(clearTextView:) forControlEvents:UIControlEventTouchUpInside];
[self.textView addSubview:self.clearButton];
And the method
- (void)clearTextView:(id)sender{
self.textView.text = #"";
}
You can use this images for the two states of the button:
just make a uibutton and put it on uitextview and set its action for clear text view;
uitextview.frame = (0,0,320,416);
uibutton.frame = (310,0,10,10);
[uibutton setimage:#"cross.png" forcontrolstate:uicontrolstatenoraml];
[uibutton addTarget:self action:#selector(clearButtonSelected:) forControlEvents:UIControlEventTouchUpInside];
-(void)clearButtonSelected{
uitextview=#"";
}
hope you want to clear the text view text when you click on cross button above is help
if not understand then i can send you proper program for that
From product perspective, if you're going to have a clear button, you probably want to use a UITextField instead of a UITextView and UITextField supports a clear button natively - set the clearButtonMode property as such:
UITextField *textfield = ...;
textfield.clearButtonMode = UITextFieldViewModeAlways;
See screenshot:
You could use UITextFieldViewModeWhileEditing to only present the clear button while the user is actively updating the content.
There's nothing built in like there is for the UITextField. You'd have to add the view yourself (probably a UIButton) and place it correctly and also somehow get the text to wrap around it correctly. (And I don't think the latter is really possible.)
Maybe instead you should display a toolbar above the keyboard (or an inputAccessoryView if you're targeting 3.2 and later) that provides a clear button.
For me changing the .frame or the .contentInset properties did not work.
For me the best result came from:
1) adding a UIView to the controller, give it round corners and a border to mimic a UITextView.
self.viewTextBackground.layer.borderColor = [UIColor colorWithRed:171/255.0 green:171/255.0 blue:171/255.0 alpha:1.0].CGColor;
self.viewTextBackground.layer.borderWidth = 1.0f;
self.viewTextBackground.layer.cornerRadius = 9.0f;
2) place UITextView on top of this UIView. Place it so that the borders of the underlying UIView stay visible.
3) give the UITextView round corners:
self.textNote.layer.cornerRadius = 9.0f;
3) Make its width fe. 30pixels less compared to the underlying UIView. You now have space for a clear-button.
4) simply add a UIButton to your controller and place it in the top-right corner of the underlying UIView.
5) change the buttons properties: set its type to 'custom' and set its image to the image of a grey cross.
6) bind an action to the button te clear the UITextView
You can add a clear button like the one in the attached screenshot with minimal coding. Just follow these steps:
Select the storyboard and drag a UIButton into your UITextView
Set the buttons constraints
Assign a title or a background image
Create the button's IBOutlet reference and the action (see onClearPressed(_:) below) for "Touch Up Inside" in the ViewController
Implement the textViewDidChange(_:) UITextViewDelegate delegate method, and make sure to set the button's isEnabled property based on the textfield content, e.g.:
func textViewDidChange(_ textView: UITextView) {
clearButton.isEnabled = !textView.text.isEmpty
}
Implement the onClearPressed(_:) action:
#IBAction func onClearPressed(_ sender: Any) {
textView.text = ""
clearButton.isEnabled = false
}
That's it.