根据HTML的contentSize自适应WKWebView的高度
static CGFloat oldHeight=0;
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{
if ([object isEqual:self.webView.scrollView]&&[keyPath isEqualToString:@"contentSize"]) {
NSLog(@"height=================%@",change[NSKeyValueChangeNewKey]);
CGFloat height = self.webView.scrollView.contentSize.height;
if (oldHeight != height) {
oldHeight = height;
if (height<=self.webView.frame.size.height) {
[self.webView mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(height/2);
}];
} else {
[self.webView mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(height);
}];
}
}
}
}
