本文實例為大家分享了WKWebView仿微信加載進度條的具體代碼，供大家參考，具體內容如下
WKWebView添加了estimatedProgress屬性（double類型），我們可以利用該屬性來設置UIProgressView
github代碼倉庫上存放的Demo
為頁面添加UIProgressView屬性
@property (nonatomic, strong) WKWebView *mywebView;@property (nonatomic, strong) UIProgressView *progressView;//設置加載進度條
懶加載UIProgressView
-(UIProgressView *)progressView{ if (!_progressView) { _progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault]; _progressView.frame = CGRectMake(0, 64, screen_width, 5); [_progressView setTrackTintColor:[UIColor colorWithRed:240.0/255 green:240.0/255 blue:240.0/255 alpha:1.0]]; _progressView.progressTintColor = [UIColor greenColor]; } return _progressView;}在初始化WKWebView時（我是在懶加載時） kvo 添加監控
[_mywebView addObserver:self forKeyPath:NSStringFromSelector(@selector(estimatedProgress)) options:0 context:nil];
頁面開始加載時，隱藏進度條
//開始加載-(void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation{ //開始加載的時候，讓進度條顯示 self.progressView.hidden = NO;}kvo 監聽進度
//kvo 監聽進度-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{ if ([keyPath isEqualToString:NSStringFromSelector(@selector(estimatedProgress))] && object == self.mywebView) { [self.progressView setAlpha:1.0f]; BOOL animated = self.mywebView.estimatedProgress > self.progressView.progress; [self.progressView setProgress:self.mywebView.estimatedProgress animated:animated]; if (self.mywebView.estimatedProgress >= 1.0f) { [UIView animateWithDuration:0.3f delay:0.3f options:UIViewAnimationOptionCurveEaseOut animations:^{ [self.progressView setAlpha:0.0f]; } completion:^(BOOL finished) { [self.progressView setProgress:0.0f animated:NO]; }]; } }else{ [super observeValueForKeyPath:keyPath ofObject:object change:change context:context]; }}在dealloc方法里移除監聽
-(void)dealloc{ [self.mywebView removeObserver:self forKeyPath:NSStringFromSelector(@selector(estimatedProgress))];}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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