UIPickerView中的自动换行 [英] Word wrap in UIPickerView

问题描述

我有一个UIPickerView，我想把文字换行。



这是我的代码：

  - （UIView *）pickerView：（UIPickerView *）pickerView viewForRow：（NSInteger）row forComponent：（NSInteger）component reusingView：（UIView *）view 
 { 
  if （component ==  0 ）{
 UILabel * lView =（UILabel *）视图; 
 
  if （！tView）{
 tView = [[UILabel alloc] init]; 
 [tView setFont：[UIFont systemFontOfSize： 15 ]]; 
 tView.numberOfLines = [种姓数]; 
} 
 tView.text = [categorie objectAtIndex：row]; 
  return  tView; 
} 
  else  {
 UILabel * lView =（UILabel *）view; 
 
  if （！sView）{
 sView = [[UILabel alloc] init]; 
 [sView setFont：[UIFont systemFontOfSize： 15 ]]; 
 sView.numberOfLines = [subCat count]; 
} 
 sView.text = [subCat objectAtIndex：row]; 
  return  sView; 
} 
} 

我尝试设置sView.numberOfLines = 0; （这通常是你如何将UILabel设置为自动换行，或者有超过1行）但是没有用。

解决方案

你还必须设置如 Stackoverflow 中所述的breakmode。如果你想进一步这个也可能很有趣。

I have a UIPickerView, and I would like to make the text word wrap.

Here is my code:

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
    if (component == 0) {
    UILabel *lView = (UILabel *)view;

    if (!tView) {
        tView = [[UILabel alloc] init];
        [tView setFont:[UIFont systemFontOfSize:15]];
        tView.numberOfLines = [categorie count];
    }
    tView.text = [categorie objectAtIndex:row];
    return tView;
    }
    else {
        UILabel *lView = (UILabel *)view;

        if (!sView) {
            sView = [[UILabel alloc] init];
            [sView setFont:[UIFont systemFontOfSize:15]];
            sView.numberOfLines = [subCat count];
        }
        sView.text = [subCat objectAtIndex:row];
        return sView;
    }
}

I tried setting sView.numberOfLines = 0; (which is how you would normally set a UILabel to word wrap, or have more than 1 line) but that didn't work.

解决方案

You must also set the breakmode as described on Stackoverflow. If you want to go further this may also be interesting.

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