Question

我知道如何通过从界面构建器拖动来向按钮添加IBAction，但我想以编程方式添加动作以节省时间并避免不断地来回切换。解决方案可能非常简单，但我在搜索时似乎无法找到任何答案。谢谢！

Answer 1

试试这个：

Swift 4

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

<强>目标C

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

您可以在Apple的文档中找到丰富的信息来源。看一下UIButton's documentation，它将揭示UIButton是UIControl,的后代，它实现了add targets的方法。

-

你需要注意在myAction之后是否添加冒号 action:@selector(myAction)

这是reference。

Answer 2

快速回答：

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

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

文档：https://developer.apple.com/documentation/uikit/uicontrol/1618259-addtarget

Answer 3

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];

Answer 4

 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 }

Answer 5

试试这个：

首先在viewcontroller的.h文件中写这个

UIButton *btn;

现在将它写在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];

将此视图外部的viewDidLoad方法写入视图控制器的.m文件中

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

Answer 6

适用于Swift 3

首先为按钮操作创建一个函数，然后将该函数添加到按钮目标

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

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

Answer 7

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 

}

Answer 8

UIButton继承自UIControl。这包含添加/删除操作的所有方法：UIControl Class Reference。请查看“准备和发送操作消息”部分，其中包含– sendAction:to:forEvent:和– addTarget:action:forControlEvents:。

Answer 9

 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];

Answer 10

IOS 14 SDK：您可以使用闭包回调添加操作：

let button = UIButton(type: .system, primaryAction: UIAction(title: "Button Title", handler: { _ in
            print("Button tapped!")
        }))

获取对控制发送者的引用

let textField = UITextField()
textField.addAction(UIAction(title: "", handler: { action in
    let textField = action.sender as! UITextField
    print("Text is \(textField.text)")
}), for: .editingChanged)

source

如何在xcode中以编程方式向按钮添加操作

10 个答案: