Objective-c - How to create a basic UIButton programmatically

objective-cprogrammatically-createduibutton

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.

Best Solution

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];

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Ios - Set UIButton title UILabel font size programmatically

button.titleLabel.font = [UIFont systemFontOfSize:size];

should help

Objective-c - Add a multiple buttons to a view programmatically, call the same method, determine which button it was

You could either keep a reference to the actual button object somewhere that mattered (like an array) or set the button's tag to something useful (like an offset in some other data array). For example (using the tag, since this is generally must useful):

for( int i = 0; i < 5; i++ ) {
  UIButton* aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
  [aButton setTag:i];
  [aButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
  [aView addSubview:aButton];
}
// then ...
- (void)buttonClicked:(UIButton*)button
{
  NSLog(@"Button %ld clicked.", (long int)[button tag]);
}

Best Solution

Related Solutions

Ios - Set UIButton title UILabel font size programmatically

Objective-c - Add a multiple buttons to a view programmatically, call the same method, determine which button it was

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