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iOS中WKWebView仿微信加载进度条

2023-08-23 04:49:05 475

本文实例为大家分享了WKWebView仿微信加载进度条的具体代码，供大家参考，具体内容如下

WKWebView添加了estimatedProgress属性（double类型），我们可以利用该属性来设置UIProgressView

github代码仓库上存放的Demo

为页面添加UIProgressView属性

@property(nonatomic,strong)WKWebView*mywebView;
@property(nonatomic,strong)UIProgressView*progressView;//设置加载进度条

懒加载UIProgressView

-(UIProgressView*)progressView{
if(!_progressView){
_progressView=[[UIProgressViewalloc]
initWithProgressViewStyle:UIProgressViewStyleDefault];
_progressView.frame=CGRectMake(0,64,screen_width,5);

[_progressViewsetTrackTintColor:[UIColorcolorWithRed:240.0/255
green:240.0/255
blue:240.0/255
alpha:1.0]];
_progressView.progressTintColor=[UIColorgreenColor];


}
return_progressView;
}

在初始化WKWebView时（我是在懒加载时）kvo添加监控

[_mywebViewaddObserver:self
forKeyPath:NSStringFromSelector(@selector(estimatedProgress))
options:0
context:nil];

页面开始加载时，隐藏进度条

//开始加载
-(void)webView:(WKWebView*)webView
didStartProvisionalNavigation:(WKNavigation*)navigation{
//开始加载的时候，让进度条显示
self.progressView.hidden=NO;
}

kvo监听进度

//kvo监听进度
-(void)observeValueForKeyPath:(NSString*)keyPath
ofObject:(id)object
change:(NSDictionary*)change
context:(void*)context{

if([keyPathisEqualToString:NSStringFromSelector(@selector(estimatedProgress))]
&&object==self.mywebView){
[self.progressViewsetAlpha:1.0f];
BOOLanimated=self.mywebView.estimatedProgress>self.progressView.progress;
[self.progressViewsetProgress:self.mywebView.estimatedProgress
animated:animated];

if(self.mywebView.estimatedProgress>=1.0f){
[UIViewanimateWithDuration:0.3f
delay:0.3f
options:UIViewAnimationOptionCurveEaseOut
animations:^{
[self.progressViewsetAlpha:0.0f];
}
completion:^(BOOLfinished){
[self.progressViewsetProgress:0.0fanimated:NO];
}];
}
}else{
[superobserveValueForKeyPath:keyPath
ofObject:object
change:change
context:context];
}
}

在dealloc方法里移除监听

-(void)dealloc{
[self.mywebViewremoveObserver:self
forKeyPath:NSStringFromSelector(@selector(estimatedProgress))];
}

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。

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iOS中WKWebView仿微信加载进度条

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