进行旋转

-(CABasicAnimation *)getTransformAnimation{
    CABasicAnimation *animation   = [CABasicAnimation animationWithKeyPath:@"transform.rotation"]; //指定对transform.rotation属性做动画
    animation.duration            = 2.0f; //设定动画持续时间
    animation.byValue             = @(M_PI*2); //设定旋转角度，单位是弧度
    animation.fillMode            = kCAFillModeForwards;//设定动画结束后，不恢复初始状态之设置一
    animation.repeatCount         = 1000;//设定动画执行次数
    animation.removedOnCompletion = NO;//设定动画结束后，不恢复初始状态之设置二
    return animation;
}

将 data 转 String

        var s = String(format: "%@", deviceToken as CVarArg)
        s = s.replacingOccurrences(of: " ", with: "")
        s = s.replacingOccurrences(of: "<", with: "")
        s = s.replacingOccurrences(of: ">", with: "")

圆形图片的切割

func circleImage(_ orign_image:UIImage?) -> UIImage? {   
    if let image = orign_image {
        UIGraphicsBeginImageContext(image.size)
        // 获得上下文
        if let ctx = UIGraphicsGetCurrentContext() {
            // 矩形框
            let rect = CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height)
            // 添加一个圆
            ctx.addEllipse(in: rect)
            // 裁剪(裁剪成刚才添加的图形形状)
            ctx.clip()
            // 往圆上面画一张图片
            image.draw(in: rect)
            // 获得上下文中的图片
            if let newImg = UIGraphicsGetImageFromCurrentImageContext() {
                // 关闭图形上下文
                UIGraphicsEndImageContext()
                return newImg
            }
            // 关闭图形上下文
            UIGraphicsEndImageContext()
        }
    }
    return nil
    
}

设置 UIBarButtonItem

func barButtonItems(withImage image:String,hightLightImage:String,target:Any,action:Selector) -> UIBarButtonItem {
    let btn = UIButton(type: .custom)
    btn.setImage(UIImage(named:image), for: .normal)
    btn.setImage(UIImage(named:hightLightImage), for: .highlighted)
    btn.sizeToFit()
    btn.addTarget(target, action: action, for: .touchUpInside)
    let view = UIView(frame: btn.frame)
    view.addSubview(btn)
    return UIBarButtonItem(customView: view)
}

func barButtonItems(withTitle title:String,target:Any,action:Selector) -> UIBarButtonItem {
    let btn = UIButton(type: .custom)
    btn.setTitle(title, for: .normal)
    btn.setTitleColor(.white, for: .normal)
    btn.sizeToFit()
    btn.addTarget(target, action: action, for: .touchUpInside)
    let view = UIView(frame: btn.frame)
    view.addSubview(btn)
    return UIBarButtonItem(customView: view)
}

找当前控制器

   func findPresentingVC() -> (UIViewController){
    var window = UIApplication.shared.keyWindow
    if window?.windowLevel != UIWindowLevelNormal {
        let windows = UIApplication.shared.windows
        for win in windows {
            if win.windowLevel == UIWindowLevelNormal {
                window = win
                break
            }
        }
    }
    var resulet = window?.rootViewController
    while ((resulet?.presentedViewController) != nil) {
        resulet = resulet?.presentedViewController
    }
    if (resulet?.isKind(of: UITabBarController.self)) ?? false {
        resulet = (resulet as? UITabBarController)?.selectedViewController
    }
    if (resulet?.isKind(of: UINavigationController.self)) ?? false {
        resulet = (resulet as? UINavigationController)?.topViewController
    }
    guard let vc = resulet else {
        return UIViewController()
    }
    return vc
}

常用的正则

/// 手机号
func validateMobile( _ str : String ) -> Bool {
    let Regex = "^((13[0-9])|(15[012356789])|(17[678])|(18[0-9])|(14[57]))\\d{8}$"
    let Test = NSPredicate(format: "SELF MATCHES %@", Regex)
    return Test.evaluate(with: str)
}
/// 车牌
func validateCarNo( _ str : String ) -> Bool {
    let Regex = "[\u{4e00}-\u{9fa5}]{1}[a-zA-Z]{1}[a-zA-Z_0-9]{4}[a-zA-Z_0-9_\u{4e00}-\u{9fa5}]$"
    let Test = NSPredicate(format: "SELF MATCHES %@", Regex)
    return Test.evaluate(with: str)
}
/// 用户名
func validateUserName( _ str : String ) -> Bool {
    let Regex = "^[A-Za-z0-9]{6,20}+$"
    let Test = NSPredicate(format: "SELF MATCHES %@", Regex)
    return Test.evaluate(with: str)
}
/// 密码
func validatePassword( _ str : String ) -> Bool {
    let Regex = "^[a-zA-Z0-9]{6,16}+$"
    let Test = NSPredicate(format: "SELF MATCHES %@", Regex)
    return Test.evaluate(with: str)
}
/// 昵称
func validateNickname( _ str : String ) -> Bool {
    let Regex = "^[\u{4e00}-\u{9fa5}]{4,8}$"
    let Test = NSPredicate(format: "SELF MATCHES %@", Regex)
    return Test.evaluate(with: str)
}
/// 身份证号
func validateIdentityCard( _ str : String ) -> Bool {
    var flag : Bool = true
    if (str as NSString).length <= 0 {
        flag = false
        return flag
    }
    let Regex = "^(\\d{14}|\\d{17})(\\d|[xX])$"
    let Test = NSPredicate(format: "SELF MATCHES %@", Regex)
    return Test.evaluate(with: str)
}
/// 昵称
func validataURL( _ str : String ) -> Bool {
    let Regex = "^http://([\\w-]+\\.)+[\\w-]+(/[\\w-./?%&=]*)?$"
    let Test = NSPredicate(format: "SELF MATCHES %@", Regex)
    return Test.evaluate(with: str)
}