Question

为什么我可以为选择器设置行高或多行，问题我有我的选择器的长文本，或者在选择器中给出一个换行符... xcode 5 ... 我从数组中获取选择器的值。我的自定义Picker的代码是：

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{

    UILabel *label = [[UILabel alloc] init];
    CGRect frame = CGRectMake(0,0,265,40);
    label.backgroundColor = PickColor;
    label.textColor = [UIColor whiteColor];
    label.font = [UIFont fontWithName:@"HelveticaNeue-Bold" size:18 ];
    label.textAlignment = NSTextAlignmentCenter;



    if(component == 0)
    {
        label.text = [_vergehen objectAtIndex:row];
    }
        return label;
}

感谢您的帮助

Answer 1

试试此代码

- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{
  return 50;
}

然后

- (UIView *)pickerView:(UIPickerView *)thePickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
   UILabel *lblTitle = [[UILabel alloc] initWithFrame:CGRectMake(5, 0, 310, 50)];
   lblTitle.numberOfLines=2;
   lblTitle.textColor=[UIColor blackColor];
   lblTitle.font=[UIFont systemFontOfSize:14];
   lblTitle.text=[selectionList objectAtIndex:row];
   return lblTitle;
}

Answer 2

因为您正在创建标签，所以您可以尝试使用UILabel的这个属性：

// UILabel wraps text across multiple lines
label.lineBreakMode = UILineBreakModeWordWrap;

如果设置label.numberOfLines = 0，您应该可以在标签中放置任意数量的行。

Answer 3

在iOS 6.0中不推荐使用

UILineBreakModeWordWrap

textLabel.lineBreakMode = NSLineBreakByWordWrapping;  
textLabel.numberOfLines = 0;

2行（多行）选择器，用于长文本

3 个答案: