swift -> button (UIButton)

 Set the size of the image in the button

        let closeBtn = UIButton.init(type: .system)
        closeBtn.frame = CGRect(x: 0, y: 0, width: 66, height: 66);
        closeBtn.setImage(#imageLiteral(resourceName: "arrow_down"), for: .normal)
        closeBtn.tintColor = UIColor.white
        closeBtn.imageEdgeInsets = UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)

 

 

Bind the long press event to the button 

 

        let btnDelete:UIButton = bomBtn();
        btnDelete.setImage(#imageLiteral(resourceName: "delete"), for: .normal);
        //Bind long press
        let longPress = UILongPressGestureRecognizer(target: self, action: #selector(KeyboardViewController.delLongPress(_:)))
        longPress.minimumPressDuration = 0.5;//Set the long press time, the default is 0.5 seconds
        longPress.numberOfTouchesRequired = 1;//The number of fingers to click
        longPress.allowableMovement = 15;//How many pixels are allowed within the activity
        btnDelete.addGestureRecognizer(longPress)

 

  

 

    func delLongPress(_ gestureRecognizer: UIGestureRecognizer) {
 
        if gestureRecognizer.state == UIGestureRecognizerState.began{//Ensure that it is only executed when pressed
            self.proxy.deleteBackward()
        }

    }

 

** When pressed, change the background color, first prepare a small size bg_blue.png that is all blue, because it will be stretched, so the small point does not matter.

 

let x = UIButton()
x.setBackgroundImage(#imageLiteral(resourceName: "bg_blue"), for: .highlighted)
x.setTitle("我是Title", for: UIControlState.normal);
self.view.addSubview(x);

  

** Set the offset of title display

btn.titleEdgeInsets = UIEdgeInsets(top: 10, left: 0, bottom: 0, right: 0) //= move down 10

 

 

 

** custom button

class DiyBtn:UIButton{
    
    var lb_1:UILabel!;
    override init(frame: CGRect) {
        super.init(frame: frame)
    }
    init(text:String,frame:CGRect) {
        super.init(frame:frame);
        
        
        lb_1 = UILabel(frame: frame);
        lb_1.text = text;
        lb_1.textAlignment = .center
        lb_1.backgroundColor = UIColor.blue;
        self.addSubview(lb_1)
        
        
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

 

use

        let bt = DiyBtn(text: "I am the title", frame: CGRect(x: 80, y: 80, width: 120, height: 120))
        self.view.addSubview(bt)
        bt.lb_1.text = "I have been modified";

 

Eventually it says "I have been modified"