WKWebView进度及title
WKWebView进度及title
WKWebView 的estimatedProgress和title 都是KVO模式,所以可以添加监控:
[webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionNew context:NULL];
[webView addObserver:self forKeyPath:@"title" options:NSKeyValueObservingOptionNew context:NULL];
监控的实现方法:
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { if ([keyPath isEqualToString:@"estimatedProgress"]) { if (object == webView) { [self.progressView setAlpha:1.0f]; [self.progressView setProgress:self.currentSubView.webView.estimatedProgress animated:YES]; if(self.currentSubView.webView.estimatedProgress >= 1.0f) { [UIView animateWithDuration:0.3 delay:0.3 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]; } } else if ([keyPath isEqualToString:@"title"]) { if (object == self.webView) { self.title = self.webView.title; } else { [super observeValueForKeyPath:keyPath ofObject:object change:change context:context]; } } else { [super observeValueForKeyPath:keyPath ofObject:object change:change context:context]; } }
这里的进度增加了动画,类似safari的进度效果
需要注意的是销毁的时候一定要移除监控
[webView removeObserver:self forKeyPath:@"estimatedProgress"]; [webView removeObserver:self forKeyPath:@"title"];