UIButton

 

   UIButton

 

   新建一个：有多种 buttonWithType

 

   UIButton * btn = [UIButton buttonWithType:UIButtonTypeCustom];

 

  然后设置 frame

 

   btn.frame = CGRectMake(10, 20 ,100, 200);

 

typedef NS_ENUM(NSInteger, UIButtonType) {
    UIButtonTypeCustom = 0,                         // no button type
    UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0),  // standard system button

    UIButtonTypeDetailDisclosure,
    UIButtonTypeInfoLight,
    UIButtonTypeInfoDark,
    UIButtonTypeContactAdd,
    
    UIButtonTypePlain API_AVAILABLE(tvos(11.0)) API_UNAVAILABLE(ios, watchos), // standard system button without the blurred background view
    
    UIButtonTypeRoundedRect = UIButtonTypeSystem   // Deprecated, use UIButtonTypeSystem instead
};

 

 

  参考： https://www.cnblogs.com/lucky-star-star/p/5630738.html

 

 

 

 

   通过 setTitle 设置按钮文案

 

   [btn setTitle: @"按钮" forState: UIControlStateNormal]

 

 

 

  设置点击事件: 通过 addTarget 和 action 、forControlEvents

 

  [btn addTarget: self action: @selector(login) forControlEvents: UIControlEventTouchUpInside]