通过代码向 UIButton 添加操作（以编程方式）

要向按钮添加方法，请首先创建一个操作方法：

Objective-C

-(void)someButtonAction:(id)sender {
  // sender is the object that was tapped, in this case its the button.
    NSLog(@"Button is tapped"); 
}

迅速

func someButtonAction() {
    print("Button is tapped")
}

现在要将此操作方法添加到按钮，你必须编写以下代码行：

目标 C.

[yourButtonInstance addTarget:self action:@selector(someButtonAction) forControlEvents:UIControlEventTouchUpInside];

迅速

yourButtonInstance.addTarget(self, action: #selector(someButtonAction), forControlEvents: .TouchUpInside)

对于 ControlEvents 参数，ENUM UIControlEvents 的所有成员都有效。