Swift：一个弹窗提示Toast

一个弹窗提示

toast.gif

调用方式

ToastView.instance.showToast(str)

或自定义显示图片

ToastView.instance.showToast(str, imageName: "icon_sad")

详细代码

import UIKit
//弹窗工具
class ToastView : NSObject{

static var instance : ToastView = ToastView()

var windows = UIApplication.sharedApplication().windows
let rv = UIApplication.sharedApplication().keyWindow?.subviews.first as UIView!

//显示加载圈圈
func showLoadingView() {
    clear()
    let frame = CGRectMake(0, 0, 78, 78)
    
    let loadingContainerView = UIView()
    loadingContainerView.layer.cornerRadius = 12
    loadingContainerView.backgroundColor = UIColor(red:0, green:0, blue:0, alpha: 0.8)
    
    let indicatorWidthHeight :CGFloat = 36
    let loadingIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.WhiteLarge)
    loadingIndicatorView.frame = CGRectMake(frame.width/2 - indicatorWidthHeight/2, frame.height/2 - indicatorWidthHeight/2, indicatorWidthHeight, indicatorWidthHeight)
    loadingIndicatorView.startAnimating()
    loadingContainerView.addSubview(loadingIndicatorView)
    
    let window = UIWindow()
    window.backgroundColor = UIColor.clearColor()
    window.frame = frame
    loadingContainerView.frame = frame
    
    window.windowLevel = UIWindowLevelAlert
    window.center = CGPoint(x: rv.center.x, y: rv.center.y)
    window.hidden = false
    window.addSubview(loadingContainerView)
    
    windows.append(window)
    
}

//弹窗图片文字
func showToast(content:String , imageName:String="icon_cool", duration:CFTimeInterval=1.5) {
    clear()
    let frame = CGRectMake(0, 0, 90, 90)
    
    let toastContainerView = UIView()
    toastContainerView.layer.cornerRadius = 10
    toastContainerView.backgroundColor = UIColor(red:0, green:0, blue:0, alpha: 0.7)
    
    let iconWidthHeight :CGFloat = 36
    let toastIconView = UIImageView(image: UIImage(named: imageName)!)
    toastIconView.frame = CGRectMake((frame.width - iconWidthHeight)/2, 15, iconWidthHeight, iconWidthHeight)
    toastContainerView.addSubview(toastIconView)
    
    let toastContentView = UILabel(frame: CGRectMake(0, iconWidthHeight + 5, frame.height, frame.height - iconWidthHeight))
    toastContentView.font = UIFont.systemFontOfSize(13)
    toastContentView.textColor = UIColor.whiteColor()
    toastContentView.text = content
    toastContentView.textAlignment = NSTextAlignment.Center
    toastContainerView.addSubview(toastContentView)
    
    
    let window = UIWindow()
    window.backgroundColor = UIColor.clearColor()
    window.frame = frame
    toastContainerView.frame = frame
    
    window.windowLevel = UIWindowLevelAlert
    window.center = CGPoint(x: rv.center.x, y: rv.center.y * 16/10)
    window.hidden = false
    window.addSubview(toastContainerView)
    windows.append(window)
    
    toastContainerView.layer.addAnimation(AnimationUtil.getToastAnimation(duration), forKey: "animation")
    
    performSelector(#selector(removeToast(_:)), withObject: window, afterDelay: duration)
}

//移除当前弹窗
func removeToast(sender: AnyObject) {
    if let window = sender as? UIWindow {
        if let index = windows.indexOf({ (item) -> Bool in
            return item == window
        }) {
           // print("find the window and remove it at index \(index)")
            windows.removeAtIndex(index)
        }
    }else{
       // print("can not find the window")
    }
}

//清除所有弹窗
func clear() {
    NSObject.cancelPreviousPerformRequestsWithTarget(self)
    windows.removeAll(keepCapacity: false)
}

}

其中，动画类

class AnimationUtil{

//弹窗动画
static func getToastAnimation(duration:CFTimeInterval = 1.5) -> CAAnimation{
    // 大小变化动画
    let scaleAnimation = CAKeyframeAnimation(keyPath: "transform.scale")
    scaleAnimation.keyTimes = [0, 0.1, 0.9, 1]
    scaleAnimation.values = [0.5, 1, 1,0.5]
    scaleAnimation.duration = duration
    
    // 透明度变化动画
    let opacityAnimaton = CAKeyframeAnimation(keyPath: "opacity")
    opacityAnimaton.keyTimes = [0, 0.8, 1]
    opacityAnimaton.values = [0.5, 1, 0]
    opacityAnimaton.duration = duration
    
    // 组动画
    let animation = CAAnimationGroup()
    animation.animations = [scaleAnimation, opacityAnimaton]
    //动画的过渡效果1. kCAMediaTimingFunctionLinear//线性 2. kCAMediaTimingFunctionEaseIn//淡入 3. kCAMediaTimingFunctionEaseOut//淡出4. kCAMediaTimingFunctionEaseInEaseOut//淡入淡出 5. kCAMediaTimingFunctionDefault//默认
    animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
   
    animation.duration = duration
    animation.repeatCount = 0// HUGE
    animation.removedOnCompletion = false
    
    return animation
}
}