ios 文字 控件 自适应 高度 宽度 CustomCell 自适应高度＋uilabel自动换行＋ UITextView 根据内容自动调整高度

CustomCell 自适应高度＋label自动换行＋ UITextView 根据内容自动调整高度

TextView在上下左右分别有一个8px的padding，当使用[NSString sizeWithFont:constrainedToSize:lineBreakMode:]时，需要将UITextView.contentSize.width减去16像素（左右的padding 2 x 8px）。同时返回的高度中再加上16像素（上下的padding），这样得到的才是UITextView真正适应内容的高度。

示例代码如下：

1 + (float) heightForTextView: (UITextView *)textView WithText: (NSString*) strText{
2 floatfPadding = 16.0;// 8.0px x 2
3 CGSize constraint = CGSizeMake(textView.contentSize.width - fPadding, CGFLOAT_MAX);
4
5 CGSize size = [strText sizeWithFont: textView.font constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
6
7 floatfHeight = size.height + 16.0;
8
9 returnfHeight;
10 }

CustomCell 自适应高度 //Customiz the height of table view cell - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { Status * sts = [statuses objectAtIndex:indexPath.row]; NSString *cellText = sts.text; UIFont *cellFont = [UIFont fontWithName:@"Helvetica" size:17.0]; CGSize constraintSize = CGSizeMake(240.0f, MAXFLOAT); CGSize labelSize = [cellText sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap]; return labelSize.height + 20; } // Customize the appearance of table view cells. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; //cell.textLabel.lineBreakMode = UILineBreakModeWordWrap; // cell.textLabel.numberOfLines = 0; //cell.textLabel.font = [UIFont fontWithName:@"Helvetica" size:17.0]; } Status *sts = [statuses objectAtIndex:indexPath.row]; //cell.textLabel.text = sts.user.screenName; //cell.detailTextLabel.text = sts.text; UILabel * label = [[UILabel alloc]initWithFrame:CGRectMake(80, 0, 240, 20)]; label.text = sts.user.screenName; [cell addSubview:label]; [label release]; NSString *cellText = sts.text; UIFont *cellFont = [UIFont fontWithName:@"Helvetica" size:12.0]; CGSize constraintSize = CGSizeMake(240.0f, MAXFLOAT); CGSize labelHeight = [cellText sizeWithFont:cellFont]; CGSize labelSize = [cellText sizeWithFont:cellFont constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap]; UILabel* tv = [[UILabel alloc]initWithFrame:CGRectMake(80, 20, labelSize.width, labelSize.height)]; tv.text = sts.text; tv.textColor = [UIColor yellowColor]; tv.numberOfLines = ceil(labelSize.height/labelHeight.height); tv.lineBreakMode = UILineBreakModeWordWrap; tv.backgroundColor = [UIColor grayColor]; //[label sizeToFit]; [cell addSubview:tv]; [tv release]; // Configure the cell. return cell; } UILabel 自动换行 CGSizetitleBrandSizeForHeight = [titleBrand.textsizeWithFont:titleBrand.font]; CGSizetitleBrandSizeForLines = [titleBrand.textsizeWithFont:titleBrand.fontconstrainedToSize:CGSizeMake(infoWidth,MAXFLOAT)lineBreakMode:UILineBreakModeWordWrap]; titleBrand.numberOfLines=ceil(titleBrandSizeForLines.height/titleBrandSizeForHeight.height); if(titleBrand.numberOfLines<=1) { titleBrand.frame=CGRectMake(5,titleBrand.frame.size.height, infoWidth, titleBrandSizeForHeight.height); }else{ titleBrand.frame=CGRectMake(5,titleBrand.frame.size.height, infoWidth,titleBrand.numberOfLines*titleBrandSizeForHeight.height); } UITextView根据内容自动调整高度 - (void)textViewDidChange:(UITextView*)textView{ if(textView.text.length> 20)//一行最多多少字节 { <wbr><wbr><wbr><wbr><wbr>//TextView底面背景图片根据内容自动调整高度</wbr></wbr></wbr></wbr></wbr> UIImage*img = [UIImageimageWithContentsOfFile:[[NSBundlemainBundle]pathForResource:@"inputbox"ofType:@"png"]]; [BgImagesetImage:[imgstretchableImageWithLeft<wbr>CapWidth<span style="color:rgb(0,0,0)">:</span><span style="color:rgb(62,1,216)">21</span>topCapHeight<span style="color:rgb(0,0,0)">:</span><span style="color:rgb(62,1,216)">14</span><span style="color:rgb(0,0,0)">]];</span></wbr> UIFont*font = [UIFontsystemFontOfSize:12]; CGSizesize = [textView.textsizeWithFont:fontconstrainedToSize:CGSizeMake(320,140)lineBreakMode:UILineBreakModeWordWrap]; BgImage.frame=CGRectMake(0,202-size.height+15,320, size.height+28); InputTextVeiw.contentInset=UIEdgeInsetsZero;//以换行为基准 [textViewsetFrame:CGRectMake(51,210-size.height+18,200, size.height+5)]; } }