UIPickerView titleForRow 未调用 - 使用两个选择器的视图

Question

我目前正在处理带有两个 pickerView 的单个视图。
我发现了类似的东西：

- (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）根本没有调用方法 titleForRow。
有什么想法吗？提前致谢

塞拉芬

Answer 1

你设置了委托/数据源吗？

Answer 2

问题已解决：
viewForRow，我需要更改我所做的自定义标签：

- (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 ;
}