Question

在我的选择器视图中，我有一个“自定义”选项，该选项应弹出UIAlertView以供用户输入新值，该值将保存在选择器的plist源中以供将来参考。正在重复调用xxxEditingDidBegin（永无止境）。

我推测它是因为我的UIAlertView触发了选择器关闭。

我该怎么做？

- (IBAction)serviceTypeFieldEditingDidEnd:(UITextField *)sender 
{
    UIPickerView *picker = [sender.inputView.subviews objectAtIndex:0];
    NSString *selText = [serviceTypeArray objectAtIndex: [picker selectedRowInComponent:0]];
    sender.text = selText;

    if (NSOrderedSame==[selText compare:@"Custom"])
    {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Custom Role" 
                                                            message:@"Enter Role Title" 
                                                           delegate:self 
                                                  cancelButtonTitle:@"Cancel" 
                                                  otherButtonTitles:@"Ok", nil];
        alertView.alertViewStyle = UIAlertViewStylePlainTextInput;
        [alertView show]; 
    }
}

Answer 1

实施类似

的方法

- (IBAction)doSelectDate:(UIDatePicker *)sender 
{
UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Hi" message:@"AlertView is shwoing" delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
        [alert show];
        [alert release];
}

并将上述方法与UIPickerView的ValueChanged事件连接;

Answer 2

我像这样修理了

- (void)pickerView:(UIPickerView *)pickerView  didSelectRow:(NSInteger)row 
                                                inComponent:(NSInteger)component 
{
    NSString *rowString = [serviceTypeArray objectAtIndex:row];

    if ([rowString compare:@"Custom"] == NSOrderedSame)
    {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Custom Role" 
                                                            message:@"Enter Role Title" 
                                                           delegate:self 
                                                  cancelButtonTitle:@"Cancel" 
                                                  otherButtonTitles:@"Ok", nil];
        alertView.alertViewStyle = UIAlertViewStylePlainTextInput;
        [alertView show]; 
    }
    else 
    {
        _serviceType.text = rowString;
    }
}

如何在UIPickerView中选择项目时显示UIAlertView

2 个答案: