Question

我目前正在使用两个pickerViews处理单个View 我找到了类似的东西：

- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component
{
if([thePickerView isEqual:pickerView ]){ 
    return [arrayNo count];
}
else if([thePickerView isEqual:pickerView2]){       
    return [arrayRootNote count];
}

else{
    return 0;
}

}  
- (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
 if([thePickerView isEqual:pickerView])
 { 
   return [arrayNo objectAtIndex:row];
}
else if([thePickerView isEqual:pickerView2]){       
    return [arrayRootNote objectAtIndex:row];
}

else{
    return [arrayRootNote objectAtIndex:row];
}

 NSLog(@"I am a called method"); 
}

我想要的是更改每个选择器的标题（由两个NSMutableArrays填充）。问题是这两个选择器显示了pickerView的“ArrayNo”。

我发现调试器（和NSLog）根本没有调用titleForRow方法。
任何的想法？提前致谢

塞拉芬

Answer 1

你设置了委托/数据源吗？

Answer 2

解决问题：
viewForRow，我需要更改自己做的自定义标签：

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

 CGRect rect = CGRectMake(0, 0, 188.25, 70.4);
 UILabel *label = [[UILabel alloc]initWithFrame:rect];
CGAffineTransform rotate = CGAffineTransformMakeRotation(3.14/2);
rotate = CGAffineTransformScale(rotate, 0.22, 1.7);

[label setTransform:rotate];
//label.text = [arrayNo objectAtIndex:row];           THAT was the error.

if([thePickerView isEqual:pickerView])                THAT is the solution.
{ 
 label.text = [arrayNo objectAtIndex:row];
   }
else if([thePickerView isEqual:pickerView2]){       
 label.text = [arrayRootNote objectAtIndex:row];
}

label.font = [UIFont fontWithName:@"Georgia" size:50];
label.textAlignment = UITextAlignmentCenter;
label.numberOfLines = 2;
label.lineBreakMode = UILineBreakModeWordWrap;
label.backgroundColor = [UIColor clearColor];
label.clipsToBounds = YES;
return label ;
}

UIPickerView titleForRow未调用 - 使用两个选择器查看

2 个答案: