ios Swift 以编程方式向按钮添加显示操作
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Swift add show action to button programmatically
提问by g_1_k
how can I add action to button programmatically. I need to add show action to buttons in mapView. thanks
如何以编程方式向按钮添加操作。我需要向 mapView 中的按钮添加显示操作。谢谢
let button = UIButton(type: UIButtonType.Custom) as UIButton
回答by Hari c
You can go for below code
`
你可以去下面的代码
`
let btn: UIButton = UIButton(frame: CGRect(x: 100, y: 400, width: 100, height: 50))
btn.backgroundColor = UIColor.green
btn.setTitle("Click Me", for: .normal)
btn.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
btn.tag = 1
self.view.addSubview(btn)
for action
行动
@objc func buttonAction(sender: UIButton!) {
let btnsendtag: UIButton = sender
if btnsendtag.tag == 1 {
dismiss(animated: true, completion: nil)
}
}
回答by Muhammad Raheel Mateen
let button = UIButton(type: UIButtonType.Custom) as UIButton
button.addTarget(self, action: "action:", forControlEvents: UIControlEvents.TouchUpInside)
//then make a action method :
func action(sender:UIButton!) {
print("Button Clicked")
}
回答by Rex
This works in Objective-C
这适用于Objective-C
You can create button like this
你可以像这样创建按钮
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button addTarget:self action:@selector(buttonAction) forControlEvents:UIControlEventTouchDragInside];
[button setTitle:@"Test Headline Text" forState:UIControlStateNormal];
button.frame = CGRectMake(20, 100, 100, 40);
[self.view addSubview:button];
Custom Action
自定义操作
-(void)buttonAction {
NSLog(@"Press Button");
}
This works in latest Swift
这适用于最新的 Swift
Will you please create button like this
你能创建这样的按钮吗
let button = UIButton()
button.frame = CGRect(x: self.view.frame.size.width - 20, y: 20, width: 100, height: 100)
button.backgroundColor = UIColor.gray
button.setTitle("ButtonNameAreHere", for: .normal)
button.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
self.view.addSubview(button)
Custom Action
自定义操作
func buttonAction(sender: UIButton!) {
print("Button tapped")
}
回答by Roberto Frontado
You need to add a Target to the button like Muhammad suggest
您需要像穆罕默德建议的那样向按钮添加一个目标
button.addTarget(self, action: "action:", forControlEvents: UIControlEvents.TouchUpInside)
But also you need a method for that action
但你也需要一个方法来做那个动作
func action(sender: UIButton) {
// Do whatever you need when the button is pressed
}
回答by Mukul Sharma
override func viewDidLoad() {
super.viewDidLoad()
let btn = UIButton()
btn.frame = CGRectMake(10, 10, 50, 50)
btn.setTitle("btn", forState: .Normal)
btn.setTitleColor(UIColor.redColor(), forState: .Normal)
btn.backgroundColor = UIColor.greenColor()
btn.tag = 1
btn.addTarget(self, action: "btnclicked:", forControlEvents: .TouchUpInside) //add button action
self.view.addSubview(btn)
}
回答by Alexey
For Swift 4 use following:
对于 Swift 4，请使用以下内容：
button.addTarget(self, action: #selector(AwesomeController.coolFunc(_:)), for: .touchUpInside)
//later in your AswesomeController
@IBAction func coolFunc(_ sender:UIButton!) {
// do cool stuff here
}
