swift版webview加载网页进度条效果
本文实例为大家分享了swift版webview加载网页展示的具体代码，供大家参考，具体内容如下
比较简单，直接上代码
importUIKit
importWebKit
importSnapKit
classCMWebVC:
UIViewController
,WKNavigationDelegate{
varwebUrl:String?
varwebView:WKWebView=WKWebView()
varprogressView:UIProgressView=UIProgressView()
varcloseBtn:UIButton!
overridefuncinitVC(){
webView.addObserver(self,forKeyPath:"estimatedProgress",options:NSKeyValueObservingOptions.new,context:nil)
webView.navigationDelegate=self
}
deinit{
webView.removeObserver(self,forKeyPath:"estimatedProgress")
webView.navigationDelegate=nil
}
overridefuncviewDidLoad(){
super.viewDidLoad()
//webview
view.addSubview(webView)
webView.snp.makeConstraints{(make)in
make.width.height.equalToSuperview()
}
//progressview
view.addSubview(progressView)
progressView.snp.makeConstraints{(make)in
make.width.equalToSuperview()
make.height.equalTo(3)
make.top.equalToSuperview()
}
progressView.tintColor=UIColor.ColorBgTheme()
progressView.isHidden=true
//loadurl
ifwebUrl!=nil{
webView.load(URLRequest(url:URL(string:webUrl!)!))
}
//shear
self.showRightItem(image:"nav_share"){
}
}
overridefuncviewWillAppear(_animated:Bool){
super.viewWillAppear(animated)
self.closeButton()
}
overridefuncviewWillDisappear(_animated:Bool){
self.closeBtn.removeFromSuperview()
}
funccloseButton(){
ifself.closeBtn==nil{
self.closeBtn=UIButton(frame:CGRect(x:44,y:0,width:44,height:44))
self.closeBtn.setTitle("关闭",for:.normal)
self.closeBtn.setTitleColor(UIColor.black,for:.normal)
self.closeBtn.addAction({(button)in
self.navigationController!.popViewController(animated:true)
})
self.navigationController?.navigationBar.addSubview(self.closeBtn)
}
}
overridefuncobserveValue(forKeyPathkeyPath:String?,ofobject:Any?,change:[NSKeyValueChangeKey:Any]?,context:UnsafeMutableRawPointer?){
//加载进度
ifkeyPath=="estimatedProgress"{
letnewprogress=change?[.newKey]!as!Float
letoldprogress=change?[.oldKey]as?Float??0.0
//不要让进度条倒着走...有时候goback会出现这种情况
ifnewprogress
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。