Swift点击浏览图片

//ZScanImage.swift

//点击展示图片

//Created by zhaojinghao on 2017/8/10.

importUIKit

classZScanImage:NSObject{

var oldFrame:CGRect=CGRect.zero

func scanBigImageWithImageView(currentImageview:UIImageView) {

letimage = currentImageview.image

letwindow =UIApplication.shared.keyWindow

letbgView =UIView(frame:CGRect(x:0, y:0, width:UIScreen.main.bounds.width, height:UIScreen.main.bounds.height))

//当前image的原始尺寸->将像素currentImageview.bounds由currentImageview.bounds所在视图转换到目标视图window中，返回在目标视图window中的像素值

oldFrame= currentImageview.convert(currentImageview.bounds, to: window)

bgView.backgroundColor=UIColor.init(red:107/255.0, green:107/255.0, blue:99/255.0, alpha:0.5)

bgView.alpha=0

letimageView =UIImageView(frame:oldFrame)

imageView.image= image

imageView.tag=1024

bgView.addSubview(imageView)

window?.addSubview(bgView)

lettap =UITapGestureRecognizer.init(target:self, action:#selector(hideImageView(tap:)))

bgView.addGestureRecognizer(tap)

UIView.animate(withDuration:0.4, animations: {

vary,width,height:CGFloat//

height = image!.size.height*UIScreen.main.bounds.width/ image!.size.width

y = (UIScreen.main.bounds.height- height) *0.5

width =UIScreen.main.bounds.width

imageView.frame=CGRect(x:0, y: y, width: width, height: height)

bgView.alpha=1.0

}, completion: {

(result)in

})

}

funchideImageView(tap:UITapGestureRecognizer){

letbackGroundV = tap.view

letimageView = tap.view?.viewWithTag(1024)

UIView.animate(withDuration:0.4, animations: {

imageView?.frame=self.oldFrame

backGroundV?.alpha=0

}, completion: {

(result)in

backGroundV?.removeFromSuperview()

})

}