如何在Xcode中以编程方式向按钮添加动作

我知道如何通过从界面构建器中拖动来将IBAction添加到按钮，但是我想以编程方式添加该动作以节省时间并避免不断地来回切换。该解决方案可能真的很简单，但是我在搜索时似乎找不到任何答案。谢谢！

试试这个：

斯威夫特4

myButton.addTarget(self,
                   action: #selector(myAction),
                   for: .touchUpInside)

目标C

[myButton addTarget:self 
             action:@selector(myAction) 
   forControlEvents:UIControlEventTouchUpInside];

您可以在Apple文档中找到丰富的信息来源。看一下UIButton的文档，它将发现UIButton是UIControl的后代，该控件实现了添加目标的方法。

-

你需要注意是否加冒号或之后不myAction中 action:@selector(myAction)

这是参考。

快速答案：

myButton.addTarget(self, action: "click:", for: .touchUpInside)

func click(sender: UIButton) {
    print("click")
}

说明文件：https : //developer.apple.com/documentation/uikit/uicontrol/1618259-addtarget

CGRect buttonFrame = CGRectMake( 10, 80, 100, 30 );
        UIButton *button = [[UIButton alloc] initWithFrame: buttonFrame];
        [button setTitle: @"My Button" forState: UIControlStateNormal];
        [button addTarget:self action:@selector(btnSelected:) forControlEvents:UIControlEventTouchUpInside];
        [button setTitleColor: [UIColor redColor] forState: UIControlStateNormal];
[view addSubview:button];

试试这个：

首先将其写入您的viewcontroller .h文件中

UIButton *btn;

现在，将此代码写入viewcontrollers viewDidLoad的.m文件中。

btn=[[UIButton alloc]initWithFrame:CGRectMake(50, 20, 30, 30)];
[btn setBackgroundColor:[UIColor orangeColor]];
//adding action programatically
[btn addTarget:self action:@selector(btnClicked:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];

在视图控制器的.m文件中将此外部viewDidLoad方法写入

- (IBAction)btnClicked:(id)sender
{
   //Write a code you want to execute on buttons click event
}

 CGRect buttonFrame = CGRectMake( x-pos, y-pos, width, height );   //
 CGRectMake(10,5,10,10) 

 UIButton *button = [[UIButton alloc] initWithFrame: buttonFrame];

 button setTitle: @"My Button" forState: UIControlStateNormal];

 [button addTarget:self action:@selector(btnClicked:) 
 forControlEvents:UIControlEventTouchUpInside];

 [button setTitleColor: [UIColor BlueVolor] forState:
 UIControlStateNormal];

 [view addSubview:button];




 -(void)btnClicked {
    // your code }

对于Swift 3

首先为按钮操作创建一个功能，然后将该功能添加到您的按钮目标中

func buttonAction(sender: UIButton!) {
    print("Button tapped")
}

button.addTarget(self, action: #selector(buttonAction),for: .touchUpInside)

UIButton *btnNotification=[UIButton buttonWithType:UIButtonTypeCustom];
btnNotification.frame=CGRectMake(130,80,120,40);
btnNotification.backgroundColor=[UIColor greenColor];
[btnNotification setTitle:@"create Notification" forState:UIControlStateNormal];
[btnNotification addTarget:self action:@selector(btnClicked) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btnNotification];


}

-(void)btnClicked
{
    // Here You can write functionality 

}

UIButton继承自UIControl。它具有添加/删除动作的所有方法：UIControl类参考。查看“准备和发送操作消息”部分，其中包括– sendAction:to:forEvent:和– addTarget:action:forControlEvents:。

 UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self 
       action:@selector(aMethod1:)
forControlEvents:UIControlEventTouchUpInside];
[button setTitle:@"Show View" forState:UIControlStateNormal];
button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
[view addSubview:button];