iphone-sdk:向 UIAlertview 添加文本字段在 iOS 4 中不起作用? [英] iphone-sdk: Adding a textfield to UIAlertview does not work in iOS 4?

问题描述

我正在尝试将 uitextfield 添加到我的 alterview.当用户尝试输入文本时，alterview 应该向上移动一点，这样键盘就不会重叠，当按下完成键时，键盘应该消失并且 alertview 应该向后移动.

I am trying to add uitextfield to my alterview. When the user tries to enter text the alterview is supposed to shift up a little bit so the keyboard does not overlap and when pressing the done key the keyboard is supposed to disappear and the alertview should shift back.

在 iOS 3.1.2(以及 3.2)中运行它时一切正常，但是当我尝试在 iOS 4 下运行它时，alertview 显示在错误的位置，并且键盘不会消失.有什么建议?这是我的代码:

It all works fine when run it in iOS 3.1.2 (and also in 3.2) but as soon as I try to run it under iOS 4 the alertview is displayed in the wrong position and the keyboard won't disappear. Any suggestions? Here is my code:

- (void)addItemAction{

workoutName = [[UIAlertView alloc] initWithTitle:@"New Workout" message:@"Insert the name of your new workout:
                " delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Done", nil];
workoutName.cancelButtonIndex = 0;
UITextField *titleField = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 90.0, 260.0, 25.0)];
titleField.delegate = self;
titleField.borderStyle = UITextBorderStyleRoundedRect;
titleField.returnKeyType = UIReturnKeyDone;
[workoutName addSubview:titleField];
[workoutName show];


}
- (BOOL)textFieldShouldReturn:(UITextField *)textField {


[textField resignFirstResponder];
return YES;

}

- (void)textFieldDidBeginEditing:(UITextField *)textField {

[UIView beginAnimations:nil context:NULL];
CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0.0, -70.0);
[workoutName setTransform:myTransform];
[UIView commitAnimations];

}

- (void)textFieldDidEndEditing:(UITextField *)textField {

[UIView beginAnimations:nil context:NULL];
CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0.0, 0.0);
[workoutName setTransform:myTransform];
[UIView commitAnimations];
self.newWorkout = textField.text;

}

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex{

if (buttonIndex == 1) {
    if (self.newWorkout != @"TestWorkout"){
    [self.workoutPlanArray insertObject:[NSDictionary dictionaryWithObjectsAndKeys:self.newWorkout, @"titleValue", @"04.08.10", @"dateValue", nil] atIndex:counter];
    counter++;
    [self.tableView reloadData];
    }
}


}

推荐答案

我也在我的应用程序中使用带有文本字段的 alertview，&在 IOS 4.0 上也是如此.它工作正常.

I am also using alertview with a textfield in my application, & that too on ioS 4.0. Its working fine.

这里是示例代码:_

-(void)showAlert{

showAlert=YES; //boolean variable

createNewAlert =[[UIAlertView alloc] initWithTitle:@"ADD item" message:@"Put it blank textfield will cover this" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];

UITextField *txtName = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 45.0, 260.0, 25.0)];
txtName.text=@"";
[txtName setBackgroundColor:[UIColor whiteColor]];
[txtName setKeyboardAppearance:UIKeyboardAppearanceAlert];
[txtName setAutocorrectionType:UITextAutocorrectionTypeNo];

[txtName setTextAlignment:UITextAlignmentCenter];
[createNewAlert addSubview:txtName];


[createNewAlert show];
}

您还可以参考以下两种在键盘通知上调用的方法.

Also you can refer the following two methods which are called on Keyboard notifications.

-(void)keyboardWillShow: (id) notification {

if(showAlert==YES)
{

    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    [createNewAlert setTransform:CGAffineTransformMakeTranslation(0,-60)];
    [createNewAlert show];
    [UIView commitAnimations];
}

}

-(void)keyboardWillHide: (id) notification {

if(showAlert==YES) 
{


        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:0.3];
        [createNewAlert setTransform:CGAffineTransformMakeTranslation(0,+60)];

        [UIView commitAnimations];

}
}

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