是这样 cell 展示一个网页所有内容然后撑开cell刷新cell高度, 然后禁掉滚动事件。这样完美实现一个自适应高度的html/富文本样式。
// 赋值部分 NSUserDefaults 高度保存 写在cell里面
NSUserDefaults *user = [NSUserDefaults standardUserDefaults];
if ([user objectForKey:webHight]) {
self.webviewHight.constant = [NSString stringWithFormat:@"%@", [user objectForKey:webHight]].floatValue;
self.webView.delegate = nil;
[user removeObjectForKey:webHight];
[user synchronize];
}else{
self.webView.delegate = self;
}
UIScrollView *first_tempView = (UIScrollView *)[self.webView.subviews objectAtIndex:0];
first_tempView.scrollEnabled = NO;
#pragma mark ----------------------- webView 代理 加载完后获取高度 ------------------------
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
// 获取webView的高度
CGFloat webViewHeight = [[self.webView stringByEvaluatingJavaScriptFromString:@"document.body.scrollHeight"] floatValue];
NSUserDefaults *user = [NSUserDefaults standardUserDefaults];
[user setObject:[NSString stringWithFormat:@"%f",webViewHeight] forKey:webHight];
[user synchronize];
// 发通知告诉tableview 刷新 tableView接收通知然后reloaddata就可以了
[self sendMessage];
}
#pragma mark ----------------------- 获取高度去刷新 ------------------------
-(void)sendMessage
{
//创建通知
NSNotification *notification =[NSNotification notificationWithName:rechNotifyName object:nil userInfo:nil];
//通过通知中心发送通知
[[NSNotificationCenter defaultCenter] postNotification:notification];
}
#pragma mark ----------------------- 更新高度通知 tableView 里面 ------------------------
-(void)getnote{
//注册通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tongzhi:) name:rechNotifyName object:nil];
}
- (void)tongzhi:(NSNotification *)text{
[_tableView reloadData];
}
// 移除监听的事件
-(void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:self name:rechNotifyName object:nil];
}