请问如何以编程方式创建基本UIButton？

Question

如何以编程方式创建基本UIButton？

我如何创建一个基本的UIButton以编程的方式？例如，在我的视图控制器中，当执行viewDidLoad方法三UIButtonS将动态创建，并设置其布局或属性。

Answer 1

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];

Answer 2

- (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];  }

Answer 3

目标-CUIButton *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);  }斯威夫特    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)}SWIFT 3及以上  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)")}斯威夫特例如，从SWIFUIDeveloper门户import SwiftUIstruct 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 DEBUGstruct ContentView_Previews : PreviewProvider {     static var previews: some View {         ContentView()     }}#endif