UITableViewCell嵌套UIWebView

来源:互联网 发布:程序员做量化 编辑:程序博客网 时间:2024/06/03 05:20


1、 获取UIWebView高度


- (void)webViewDidFinishLoad:(UIWebView *)webView{    // 如果要获取webView高度必须在网页加载完成之后获取    // 方法一    CGFloat height = [self.webView sizeThatFits:CGSizeZero].height;    // 方法二    CGFloat height = webView.scrollView.contentSize.height;    // 方法三 (不推荐使用,当webView.scalesPageToFit = YES计算的高度不准确)    CGFloat height = [[self.webView stringByEvaluatingJavaScriptFromString:@"document.body.offsetHeight"] floatValue];}


2、UIWebView加载完成后cell高度的更新,使用通知来实现


TableViewCell.m- (void)webViewDidFinishLoad:(UIWebView *)webView{    CGSize fittingSize = [self.webView sizeThatFits:CGSizeZero];    self.height = fittingSize.height;    self.webView.frame = CGRectMake(0, 0, fittingSize.width, fittingSize.height);    // 用通知发送加载完成后的高度    [[NSNotificationCenter defaultCenter] postNotificationName:@"WEBVIEW_HEIGHT" object:self userInfo:nil];}


ViewController.m- (void)viewDidLoad{    [super viewDidLoad];    // 用于缓存cell高度    self.heightDic = [[NSMutableDictionary alloc] init];    // 注册加载完成高度的通知    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(noti:) name:@"WEBVIEW_HEIGHT" object:nil];}- (void)noti:(NSNotification *)sender{    TableViewCell *cell = [sender object];    if (![self.heightDic objectForKey:[NSString stringWithFormat:@"%ld",cell.tag]]||[[self.heightDic objectForKey:[NSString stringWithFormat:@"%ld",cell.tag]] floatValue] != cell.height)    {        [self.heightDic setObject:[NSNumber numberWithFloat:cell.height] forKey:[NSString stringWithFormat:@"%ld",cell.tag]];       [self.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:cell.tag inSection:0]] withRowAnimation:UITableViewRowAnimationNone];    }}



参考:

http://www.jianshu.com/p/e199496a8b8a


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