我如何创建一个基本的UIButton编程?例如,在我的视图控制器中,当执行viewDidLoad方法时,将动态创建三个uibutton,并设置其布局或属性。
当前回答
对于Swift 2.2(带有新的“selector”声明)。
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
}
其他回答
如果愿意,可以将创建者实例放入循环中,并从数组中动态添加名称。
-(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
}
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.
斯威夫特
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)
这里有一个:
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];
UIButton * tmpBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[tmpBtn addTarget:self action:@selector(clearCart:) forControlEvents:UIControlEventTouchUpInside];
tmpBtn.tag = k;
tmpBtn.frame = CGRectMake(45, 0, 15, 15);
[tmpBtn setBackgroundImage:[UIImage imageNamed:@"CloseButton.png"] forState:UIControlStateNormal];
[self.view addSubview:tmpBtn];
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