【每日技术点】13.12.13

1、UITextView在UITableViewCell 中自适应高度的问题

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
   。。。。。。

UITextView * contentView = [[UITextView alloc] initWithFrame:CGRectZero];
        contentView.textColor = [UIColor colorWithRed:80.0/255.0 green:132.0/255.0 blue:183.0/255.0 alpha:1.0];
        [contentView setFont:[UIFont systemFontOfSize:12.0f]];
        [contentView setBackgroundColor:[UIColor clearColor]];
        [contentView setEditable:NO];
        contentView.contentInset = UIEdgeInsetsMake(15,-8,0,18);//这句很重要，因为textview中的text也是有自己的边界的。
        [cellBgView addSubview:contentView];
        
        NSString *text = [contentArray objectAtIndex:[indexPath section]];
        CGSize constraint = CGSizeMake(200, 20000.0f);
        CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:12.0f] constrainedToSize:constraint lineBreakMode:NSLineBreakByWordWrapping];
        [contentView setFrame:CGRectMake(10, 10, 280, MAX(size.height, 44.0f))];

 }

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *text = [contentArray objectAtIndex:[indexPath section]];
    CGSize constraint = CGSizeMake(200, 20000.0f);
    CGSize size = [text sizeWithFont:[UIFont systemFontOfSize:12] constrainedToSize:constraint lineBreakMode:NSLineBreakByWordWrapping];
    CGFloat height = MAX(size.height, 44.0f);
    return height + (10 * 2);
}