无法在 iOS7 上将 UITextField 添加到 UIAlertView...适用于 iOS 6 [英] Unable to add UITextField to UIAlertView on iOS7...works in iOS 6

问题描述

以下代码适用于 iOS6(及更早版本)，但 UITextField 在 iOS7 中不显示...关于如何在 iOS7 中的 UIAlterView 中显示 UITextField 的任何想法?

The code below works on iOS6 (and before) but the UITextField does not display in iOS7...any ideas on how to get a UITextField to display in an UIAlterView in iOS7?

UIAlertView* dialog = [[UIAlertView alloc] init];
[dialog setDelegate:self];
[dialog setTitle:@"Enter ESC Score"];
[dialog setMessage:@" "];
[dialog addButtonWithTitle:@"Cancel"];
[dialog addButtonWithTitle:@"OK"];
dialog.tag = 5;

nameField = [[UITextField alloc] initWithFrame:CGRectMake(20.0, 45.0, 245.0, 25.0)];
[nameField setKeyboardType:UIKeyboardTypeNumberPad];
[nameField becomeFirstResponder];
[nameField setBackgroundColor:[UIColor whiteColor]];
[dialog addSubview:nameField];
CGAffineTransform moveUp = CGAffineTransformMakeTranslation(0.0, 0.0);
[dialog setTransform: moveUp];
[dialog show];
[dialog release];

[nameField release];

iOS6 代码运行显示:

Code run for iOS6 displays this:

iOS7 中的相同代码显示了这个(注意 UITextField 是如何丢失的并且没有键盘):

same code in iOS7 displays this (notice how UITextField is missing and there is no keyboard):

推荐答案

你不能轻易改变 iOS 7 中 UIAlertView 的视图层次结构.(你也不应该；文档明确告诉你不要这样做.)转到在开发者论坛上查看有关它的长时间讨论.

You can't easily alter the view hierarchy of a UIAlertView in iOS 7. (Nor should you; the documentation specifically tells you not to.) Head over to the developer forums to see a long discussion about it.

在您的情况下，另一种选择是设置 alert.alertViewStyle = UIAlertViewStylePlainTextInput; 这将为您添加一个文本字段.您可以使用 UITextField *textField = [alertView textFieldAtIndex:0]; 在 UIAlertView 委托回调中访问它.

One alternative in your case is to set alert.alertViewStyle = UIAlertViewStylePlainTextInput; This will add a text field for you. You can access it in the UIAlertView delegate callback by using UITextField *textField = [alertView textFieldAtIndex:0];.

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