Question

我将UITextField放入UIAlertView并将其向上移动，以便键盘不会用以下代码覆盖它：

[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：

- (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：

@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解除键盘？

谢谢，本

Answer 1

任何使用ARC支持iOS 5.0以上版本的人都可以设置这个直接alertViewStyle属性：

-(void)showAlertWithTextField{
    UIAlertView* dialog = [[UIAlertView alloc] initWithTitle:@"Enter Name" message:@"" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Add", nil];    
    [dialog setAlertViewStyle:UIAlertViewStylePlainTextInput];

    // Change keyboard type
    [[dialog textFieldAtIndex:0] setKeyboardType:UIKeyboardTypeNumberPad];
    [dialog show];
}

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    if (buttonIndex == 1)
        NSLog(@"%@",[[alertView textFieldAtIndex:0]text]);
}

Answer 2

对于那些可能关心的人，这是一个有效的解决方案：

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];

确保您已创建UITextField * nameField;在.h文件中，您可以通过以下操作获取用户键入的文本： inputText = [nameField text];

中的 - （void）alertView：（UIAlertView *）alert clickedButtonAtIndex：（NSInteger）buttonIndex方法。

重要提示：对于iOS 4.0 +，CGAffineTransform会自动完成，因此如果您的目标只是4.0+，则可以将其删除。否则，您需要检查您所在的操作系统并进行相应处理。

Answer 3

值得一试

http://junecloud.com/journal/code/displaying-a-password-or-text-entry-prompt-on-the-iphone.html?cmd=success#comment3870

获得完整而全面的解决方案。

Answer 4

找到文本字段而不保留对其的明确引用的简单方法是设置其标记：

nameField.tag = ALERTVIEW_NAMEFIELD;

确保它与0以及您可能拥有的其他UIView个对象标签不同，包括父对话框！

然后在alertView:clickedButtonAtIndex:处理程序中，您可以通过以下方式检索文本字段：

UITextField *nameField = (UITextField *)[alertView viewWithTag:ALERTVIEW_NAMEFIELD];

Answer 5

找到更明确的解决方案。请查看以下代码段：Username and Password UITextFields in UIAlertView prompt

Answer 6

查看此实施： https://github.com/josecastillo/EGOTextFieldAlertView

Answer 7

一个非常好的方法是，只有在激活键盘时，才能使用UITextFieldDelegate的委托方法移动对话框。见下文。

- (void)textFieldDidBeginEditing:(UITextField *)textField {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5]; 
    [UIView setAnimationDelegate:self];

    CGAffineTransform moveUp = CGAffineTransformMakeTranslation(0.0, -20);
    [dialog setTransform: moveUp];

    [UIView commitAnimations];
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5]; 
    [UIView setAnimationDelegate:self];

    CGAffineTransform moveDown = CGAffineTransformMakeTranslation(0.0, 0.0);
    [dialog setTransform: moveDown];

    [textField resignFirstResponder];

    return YES;
}

Answer 8

适用于iOS5和ARC。

-(void)showAlert {
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"New Album" 
        message:@"Enter a name for the album." 
        delegate:self 
        cancelButtonTitle:@"Cancel" 
        otherButtonTitles:@"Save", nil];
    alertView.alertViewStyle = UIAlertViewStylePlainTextInput;

    UITextField* textfield = [alertView textFieldAtIndex:0];
    textfield.placeholder = @"Title";

    [alertView show];
}

-(void)alertView:(UIAlertView *)alertView 
    didDismissWithButtonIndex:(NSInteger)buttonIndex 
{
    if (buttonIndex != 1) {
        NSLog(@"Cancel");
        return;
    }
    UITextField* textfield = [alertView textFieldAtIndex:0];
    NSLog(@"Save. text: %@", textfield.text);
}

Answer 9

这实际上只是常规UIAlertView代码的一行。希望这有帮助！

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"test" message:@"This is a alert with a textfield" delegate:self cancelButtonTitle:@"YAY" otherButtonTitles:nil];
    alert.alertViewStyle = UIAlertViewStylePlainTextInput;
    [alert show];
    [alert release];

仅在iOS 5或更高版本上运行

Answer 10

想在iWasRobbed的回答中添加一个小调整：

<强> GenericAlertDialogs.m：

+ (void)displayInputDialog:(NSString*)title delegate:(id<UIAlertViewDelegate>)delegate textFiled:(UITextField*)txtField
{
    UIAlertView* dialog = [[UIAlertView alloc] init];
    [dialog setDelegate:delegate];
    [dialog setTitle:title];
    [dialog setMessage:@" "];
    [dialog addButtonWithTitle:@"Cancel"];
    [dialog addButtonWithTitle:@"OK"];

    if(UIInterfaceOrientationIsPortrait([[UIApplication sharedApplication] statusBarOrientation]))
    {
        txtField.frame = CGRectMake(20.0, 45.0, 245.0, 25.0);
    }
    else 
    {
        txtField.frame = CGRectMake(20.0, 30.0, 245.0, 25.0);
    }

    [txtField becomeFirstResponder];
    [txtField setBackgroundColor:[UIColor whiteColor]];
    [dialog addSubview:txtField];
    [dialog show];   
}

其他一些.m文件（实现UIAlertViewDelegate）

 self->txtChangeName = [[UITextField alloc] init];
 [GenericAlertDialogs displayInputDialog:@"Some title...:" 
                                delegate:self 
                               textFiled:txtChangeName];

UIAlertViewDelegate协议处理：

- (void) alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex 
{
    if(buttonIndex == 1)
    {
        if([txtChangeName.text length] > 0)
        {
            self->userInput = [txtChangeName text];
         }
     }
     self->txtChangeName = nil;
}

iOS 4+兼容。

iPhone上的UIAlertView中的UITextField - 如何使其响应？

10 个答案: