iphone - 为多个 UIPickerView 设置数据

Question

我有两个 UIPickerViews，数据是从数组中提取的，但我似乎无法单独对它们进行编程。这是我用于 UIPickerViews 的代码:

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    return [treatments count];
}

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    return 1;
}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
      return[[treatments objectAtIndex:row]valueForKey:@"treatmentName"];
}

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
    _buttonText.text = [[treatments objectAtIndex:row]valueForKey:@"treatmentName"];
    if (![_buttonText.text isEqual: @"Pick a Treatment Name"]) {
        _buttonText.textColor = [UIColor blackColor];
    }
}

-(NSInteger)nursePicker:(UIPickerView *)nursePicker numberOfRowsInComponent:(NSInteger)component {
    return [nurses count];
}

- (NSString *)nursePicker:(UIPickerView *)nursePicker titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    return[[nurses objectAtIndex:row]valueForKey:@"nurseName"];
}

当我运行代码时，选择器显示相同的数据

提前致谢

Answer 1

存储对您的两个选择器 View 的引用，并使用作为参数传递给数据源方法的 UIPickerView 以确定您使用的是哪个选择器 View 。

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    if (pickerView == self.nursePicker) {
        return [nurses count];
    }
    else if (pickerView == self.treatmentPicker) {
        return [treatments count];
    }
}

每个数据源方法的想法相同