iOS 获取webView的title
[self.webView addObserver:self forKeyPath:@"title" options:NSKeyValueObservingOptionNew context:NULL];
[self.webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionNew context:NULL];
-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)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];
}
}
}
