XCODE - 如何：循环中的 UIAlertView（带有文本字段），直到将正确的值输入到字段中？
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XCODE - How to: UIAlertView (with a text field) on a loop until correct value entered into field?
提问by Alec McLeod
I'm currently working in Xcode on an iOS app...
我目前正在 Xcode 上的 iOS 应用程序中工作...
I've set up a UIAlertView (with a question as the message ) to pop up with a text field to retrieve a response.
我已经设置了一个 UIAlertView（带有一个问题作为消息）来弹出一个文本字段来检索响应。
The desired functionality is that upon entering an incorrect value into the text field, the UIAlert would loop... Until the correct response is entered. At this point, the UIAlert would be dismissed.
所需的功能是在文本字段中输入不正确的值时，UIAlert 将循环......直到输入正确的响应。此时，UIAlert 将被解除。
Heres what I have so far...
这是我到目前为止所拥有的......
- (void)application:(UIApplication *)application
didReceiveLocalNotification:(UILocalNotification *)notification {
NSString* correctAnswer = @"2";
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@"Alarm"
message:@"1 + 1 ="
delegate:self
cancelButtonTitle: nil
otherButtonTitles:@"Continue", nil ];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
UITextField* answerField = [alert textFieldAtIndex:0];
answerField.keyboardType = UIKeyboardTypeNumberPad;
answerField.placeholder = @"answer";
[alert show];
// I feel like this would work, but I know it doesn't...
NSString *answerFieldString = answerField.text;
if ([answerFieldString isEqualToString: correctAnswer ])
{
[alert dismissWithClickedButtonIndex:-1 animated:YES];
}
}
I've done extensive google searching and can't come up with a solution... Any responses would be much appreciated!
我已经进行了广泛的谷歌搜索，但无法提出解决方案......任何答复将不胜感激！
采纳答案by Deepesh
try this...
尝试这个...
- (BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView *)alertView
{
NSString *answerFieldString = answerField.text;
if ([answerFieldString isEqualToString: correctAnswer ])
{
[alertView dismissWithClickedButtonIndex:-1 animated:YES];
}
}
