在 iPhone 中显示带有文本框的警报视图

是否可以像 AppStore 应用程序一样显示带有文本框的警报视图。 它在这样的对话框中要求输入密码。 我至少见过一些其他第三方应用程序在使用它。它是私有 API 吗？

这是来自 Tharindu Madushana 的“Apple 批准”的操作方法。我从他在此页面的评论中得到了它：http://iosdevelopertips.com/undocumented/alert-with-textfields.html

// Ask for Username and password.
UIAlertView *alertview = [[UIAlertView alloc] initWithTitle:@"Twitter Details!" message:@"\n \n \n" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];

// Adds a username Field
UITextField *utextfield = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 45.0, 260.0, 25.0)]; 
utextfield.placeholder = @"Username";
[utextfield setBackgroundColor:[UIColor whiteColor]]; 
[alertview addSubview:utextfield];

// Adds a password Field
UITextField *ptextfield = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 80.0, 260.0, 25.0)]; 
ptextfield.placeholder = @"Password";
[ptextfield setSecureTextEntry:YES];

[ptextfield setBackgroundColor:[UIColor whiteColor]]; [alertview addSubview:ptextfield];
// Move a little to show up the keyboard
CGAffineTransform transform = CGAffineTransformMakeTranslation(0.0, 80.0);
[alertview setTransform:transform];

// Show alert on screen.
[alertview show];
[alertview release];

//...
// Don't forget to release these after getting their values
[utextfield release];
[ptextfield release];

最后取回文本

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0)
        return; //Cancel

    UITextField *field = (UITextField *)[[alertView subviews] lastObject];
    NSLog (@"%@", field.text);
}