如何調整UITableViewCell的文本大小？

Question

我從服務器獲取一些文本，並將它放到UILabel中，它將被添加到UITableViewCell中，並且每次它可以很小或很大或多行時更改此文本。我的問題是我如何使這個UILabel自動適應文本（多行）並調整UITableViewCell的大小以適應UILabel？

Answer 1

你可以在你的tableView的數據源如下：

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { 
    // for the sake of illustration, say your model for this table is just an array of strings you wish to present. 
    // it's probably more complex, but the idea is to get the string you want to present for the 
    // cell at indexPath 
    NSString *stringForThisCell = [self.model objectAtIndex:indexPath.row]; 

    // you can get fancier here, and dynamically get the font from the UITextView prototype 
    // but for simplicity, just copy the font size you configured the text view with in your nib 
    CGSize size = [stringForThisCell sizeWithFont:[UIFont systemFontOfSize:14.0]]; 

    // this is a little funky, because for it to be just right, you should format your prototype 
    // cell height to be a good-looking height when your text view has a zero height. 
    // the basic idea here is that the cell will get taller as the text does. 
    return tableView.rowHeight + size.height; 
} 

然後，當您將單元配置，獲取字符串和大小相同的方式，並設定UITextView的框架相匹配的大小

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


     NSString *stringForThisCell = [self.model objectAtIndex:indexPath.row]; 
     CGSize size = [stringForThisCell sizeWithFont:[UIFont systemFontOfSize:14.0]]; 
     UITextView *myTextView = (UITextView *)[cell viewWithTag:kMY_TEXT_VIEW_TAG]; // make this tag match a tag you give the text view in the prototype cell 

     myTextView.frame = CGRectMake(myTextView.frame.origin.x, myTextView.frame.origin.y, size.width, size.height); 
     // the rest of your configure cell 
} 

Answer 2

您需要實現這一點： -

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 

{ 
    CGSize labelsize; 
    UILabel * textDesc1 = [[UILabel alloc] init]; 
    [textDesc1 setNumberOfLines:0]; 
    textDesc1.text=[self.blogTextArray objectAtIndex:indexPath.row];//replace with your own text 
    [textDesc1 setFont:[UIFont fontWithName:@"Helvetica" size:14.0]]; 
    labelsize=[textDesc1.text sizeWithFont:textDesc1.font constrainedToSize:CGSizeMake(320, 2000.0) lineBreakMode:UILineBreakModeWordWrap]; 
    [textDesc1 release]; 
    return (CGFloat)labelsize.height; 


} 
- (UITableViewCell *)tableView:(UITableView *)tbleView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    CGSize labelsize; 
    UILabel *commentsTextLabel = [[UILabel alloc] init];; 
    [commentsTextLabel setNumberOfLines:0]; 
    [commentsTextLabel setBackgroundColor:[UIColor clearColor]]; 
    NSString *text=[self.blogTextArray objectAtIndex:indexPath.row];//replace with your own text 
commentsTextLabel.text=text; 
    [commentsTextLabel setFont:[UIFont fontWithName:@"Helvetica"size:14]]; 
    labelsize=[text sizeWithFont:commentsTextLabel.font constrainedToSize:CGSizeMake(320, 2000.0) lineBreakMode:UILineBreakModeWordWrap]; 
    commentsTextLabel.frame=CGRectMake(0, 0, 320, labelsize.height); 
    [cell.contentView addSubview:commentsTextLabel]; 
    [commentsTextLabel release]; 
}