iPhone 上 UIAlertView 中的 UITextField - 如何使其响应? [英] UITextField in UIAlertView on iPhone - how to make it responsive?

问题描述

我将一个 UITextField 放入一个 UIAlertView 并将其向上移动，这样键盘就不会用以下代码覆盖它:

I placed a UITextField into a UIAlertView and moved it up so the keyboard wouldn't cover it up with the following code:

[dialog setDelegate:self];
[dialog setTitle:@"Enter Name"];
[dialog addButtonWithTitle:@"Cancel"];
[dialog addButtonWithTitle:@"OK"];
UITextField * nameField = [[UITextField alloc] initWithFrame:CGRectMake(20.0, 45.0, 245.0, 25.0)];
[nameField setBackgroundColor:[UIColor whiteColor]];
[dialog addSubview:nameField];
CGAffineTransform moveUp = CGAffineTransformMakeTranslation(0.0, 100.0);
[dialog setTransform: moveUp];
[dialog show];

我还有以下代码来处理警报视图:

I also have the following code to deal with the alert view:

- (void) alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex{    
    NSLog(@"%d", (int) buttonIndex);
    if (buttonIndex == 1) { // OK pushed
        NSLog([alert textField].text); // does not log anything
    } else {
        // Cancel pushed
}}

我还有一个 UIAlertViewExtended.h 文件，其中包含:

I also have a UIAlertViewExtended.h file that contains:

@class UITextField, UILabel;

@interface UIAlertView(Extended)

-(UITextField *)textField;

@end

我的问题是如何获取用户输入的文本以及如何关闭键盘?

My question is how do I get the text the user entered and how do I dismiss the keyboard?

谢谢，本

推荐答案

对于那些可能关心的人，这里有一个可行的解决方案:

For those who may care, here's a working solution:

UIAlertView* dialog = [[UIAlertView alloc] init];
[dialog setDelegate:self];
[dialog setTitle:@"Enter Name"];
[dialog setMessage:@" "];
[dialog addButtonWithTitle:@"Cancel"];
[dialog addButtonWithTitle:@"OK"];

nameField = [[UITextField alloc] initWithFrame:CGRectMake(20.0, 45.0, 245.0, 25.0)];
[nameField setBackgroundColor:[UIColor whiteColor]];
[dialog addSubview:nameField];
CGAffineTransform moveUp = CGAffineTransformMakeTranslation(0.0, 100.0);
[dialog setTransform: moveUp];
[dialog show];
[dialog release];
[nameField release];

确保你已经创建了 UITextField * nameField;在您的 .h 文件中，您可以通过执行以下操作获取用户输入的文本:inputText = [nameField text];

Make sure you've created UITextField * nameField; in your .h file, then you can get at the text the user typed in by doing: inputText = [nameField text];

在 - (void) alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex 方法中.

in the - (void) alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex method.

重要说明:对于 iOS 4.0+，CGAffineTransform 是自动完成的，因此如果您只针对 4.0+，则可以忽略这一点.否则，您将需要检查您使用的是哪个操作系统并进行相应处理.

important note: for iOS 4.0+, the CGAffineTransform is done automatically so you can leave that bit out if you're only targeting 4.0+. Otherwise, you will need to check which OS you are on and handle it accordingly.

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