wait_fences:无法接收回复:10004003

    alert = [[UIAlertView alloc] 
                          initWithTitle:@"Lookup" 
                          message:@"\n\n\n" 
                          delegate:self 
                          cancelButtonTitle:@"Cancel" 
                          otherButtonTitles:@"Submit", nil];

label = [[UILabel alloc] initWithFrame:CGRectMake(12, 40, 260, 25)];
label.font = [UIFont systemFontOfSize:16];
label.textColor = [UIColor whiteColor];
label.backgroundColor = [UIColor clearColor];
label.shadowColor = [UIColor blackColor];
label.shadowOffset = CGSizeMake(0, -1);
label.textAlignment = UITextAlignmentCenter;
label.text = @"Enter 10-Digit ISBN Number";
[alert addSubview:label];

field = [[UITextField alloc] initWithFrame:CGRectMake(16, 83, 252, 25)];
field.font = [UIFont systemFontOfSize:18];
field.backgroundColor = [UIColor whiteColor];
field.keyboardAppearance = UIKeyboardAppearanceAlert;
field.keyboardType = UIKeyboardTypeNumberPad;
field.borderStyle = UITextBorderStyleBezel;
field.delegate = self;
[field becomeFirstResponder];
[alert addSubview:field];
[alert show];

我在网上四处寻找,试图找出问题所在,有些人提到了辞职。我将其添加到了-(void)alertView:(UIAlertView*)alertView没有使用buttonIndex:(NSInteger)buttonIndex解除操作,但它没有执行任何操作。

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
[field resignFirstResponder]
if (buttonIndex == 1) {
    NSLog(@"Submit");
} else {
    NSLog(@"Cancel");
}

然后我添加了一个if语句,试图找出field是否是第一个响应者,但没有得到任何结果。

if([field isFirstResponder]) {
     NSLog(@"field isFirstResponder");
}

有人对我可能做错什么有什么建议吗?