swift中UIButton的使用

UIButton的相关操作

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
   
        self.setupButton()
    }

    func setupButton() {
        // 创建button
        /**
         public enum UIButtonType : Int {
         case custom // no button type  定制按钮，前面不带图标，默认文字颜色为白色，无触摸时
         @available(iOS 7.0, *)
         case system // standard system button  前面不带图标，默认文字颜色为蓝色，有触摸时的高亮效果
         case detailDisclosure  前面带“!”图标按钮，默认文字颜色为蓝色，有触摸时的高亮效果
         case infoLight 为感叹号“!”圆形按钮
         case infoDark  为感叹号“!”圆形按钮
         case contactAdd    前面带“+”图标按钮，默认文字颜色为蓝色，有触摸时的高亮效果
         public static var roundedRect: UIButtonType { get } // Deprecated, use UIButtonTypeSystem instead
         }
         */
        let button: UIButton = UIButton(type: .contactAdd)
        button.frame = CGRect(x: 100, y: 100, width: 100, height: 100)
        button.backgroundColor = UIColor.red
        // 设置背景图片
        let image = UIImage(named: "back")
        button.setBackgroundImage(image, for: .normal)
        /**
         public struct UIControlState : OptionSet {
         
         public init(rawValue: UInt)
         public static var normal: UIControlState { get } 普通状态下的文字
         public static var highlighted: UIControlState { get } 触摸状态下的文字
         public static var disabled: UIControlState { get } 禁用状态下的文字
         public static var selected: UIControlState { get } // flag usable by app (see below)
         public static var focused: UIControlState { get } // Applicable only when the screen supports focus
         public static var application: UIControlState { get } // additional flags available for application use
         public static var reserved: UIControlState { get } // flags reserved for internal framework use
         }

         */
        // 设置文字
        button.setTitle("点击", for: .normal)
        // 设置点击事件 (带参数)
        button.addTarget(self, action: #selector(buttonClick(_:)), for: .touchUpInside)
        // 设置点击事件 (不带参数)
        button.addTarget(self, action: #selector(buttonotherClick), for: .touchUpInside)
        // 设置图片
        button.setImage(UIImage(named: "back"), for: .normal)
        // 使禁用模式下按钮也不会变暗
        button.adjustsImageWhenDisabled = false
        // 使触摸模式下按钮也不会变暗
        button.adjustsImageWhenHighlighted = false
        // 设置远角
        button.layer.masksToBounds = true
        button.layer.cornerRadius = 50
        // 设置按钮点击时高亮，默认点击时是高亮状态
        button.showsTouchWhenHighlighted = true
    }
    
    func buttonClick(_ btn: UIButton) {
        
    }
    func buttonotherClick() {
    
    }

}