ios - 如何将2个UIpickerView添加到一个UIview中？

Question

我有点懵。我有一个主要的 UIView 并且我在主要的中粘贴了 2 个 UIViews。在每个“ child ”-UIView 中，我都有一个 UIPickerView。我的问题是第一个 UIPickerView 具有以下功能，但不知道如何为第二个执行此操作。有人可以帮我吗？

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


-(NSInteger)pickerView:(UIViewController *)pickerView numberOfRowsInComponent:(NSInteger)component{
    if(component==option)
        return[options count];
    return 0;

}


-(NSString *)pickerView:(UIViewController *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    if(component==option)
         return[options objectAtIndex:row];
    return 0;
}


-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    _optionLabel.text=[options objectAtIndex:[myPickerView selectedRowInComponent:0]];
}

那么，有什么方法可以将这些功能复制到我的第二个 pickerView 吗？

Answer 1

您需要像这样设置选择器 View 标签

#Updated

myPickerView.tag = 1;  //It's for first PickerView
directionTranslationPickerView.tag = 2;  //It's for second PickerView

请在创建 pickerview 的地方实现这两行。

    - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
    if (pickerView.tag==1) {
        return 1; //It's for first PickerView
    }else{
        return 1; // It's for second pickerview
    }

}


- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
    if (pickerView.tag==1) {
        if(component==option)
            return[options count]; //It's for first PickerView
        return 0;

    }else{

        // It's for second pickerview
        return 0;

    }

}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    if (pickerView.view.tag==1) {
        if(component==option)
            return[options objectAtIndex:row]; //It's for first PickerView
        return 0;
    }else{
        // It's for second pickerview
    }

}


- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    if (pickerView.view.tag==1) {
        _optionLabel.text=[options objectAtIndex:[myPickerView selectedRowInComponent:0]]; //It's for first PickerView

    }else{
        // It's for second pickerview
    }
}

试试这个可能对你有帮助。注意:您需要为您的 UIPickerView 设置标签 must