Question

我正在尝试修复iOS 7+警报，允许我输入4位数代码，此时出现提示，但输入字段为空白且不允许我输入任何内容。以下方法用于调用引脚代码选项，从segmentedAction开始，如下所示;

-(void)segmentedAction:(id)sender{


        UISegmentedControl *control = (UISegmentedControl *)sender;

        NSString *pincode = [self.objSettingAdapter getPinCode];
        NSString *patternCode = [self.objSettingAdapter getPatternCode];
        NSInteger pincodetype = control.selectedSegmentIndex;


        if ((![pincode length]>0) && pincodetype==0) {

            [self takePinInputFromUser:@"Choose Your PIN Code"];

        }else if((![patternCode length]>0) && pincodetype==1) {

            [self takePatterInputFromUser:@"Draw Pattern"];

        }else {

            [self.objSettingAdapter setPinCodeType:control.selectedSegmentIndex];
        }

}

-(void)buttonAction:(id)sender{

    UIButton *btn = (UIButton *)sender;

    NSString *pincode = [self.objSettingAdapter getPinCode];
    NSString *patternCode = [self.objSettingAdapter getPatternCode];

    if ([btn.titleLabel.text isEqualToString:@"Reset PIN"] && (![pincode length]>0)) {

        [self takePinInputFromUser:@"Choose Your PIN Code"];

    }else if ([btn.titleLabel.text isEqualToString:@"Reset Pattern"] && (![patternCode length]>0)) {

        [self takePatterInputFromUser:@"Draw Pattern"];
    }else {

        [self.objSettingAdapter setPinCodeType:([btn.titleLabel.text isEqualToString:@"Reset PIN"] ? 0 : 1)];
    }

}


    -(void)takePinInputFromUser:(NSString *)title{

        AlertPinCode *prompt = [AlertPinCode alloc];
        prompt = [prompt initWithTitle:title message:@"\n\n" delegate:self cancelButtonTitle:@"Cancel" okButtonTitle:@"Done"];
        [prompt show];
    }

- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{

    AlertPinCode *alertPin = (AlertPinCode *) alertView;

    if (buttonIndex != [alertView cancelButtonIndex])
    {
        NSString *userPin = [alertPin enteredText];

        if ([userPin length]<4) {

            [alertPin dismissWithClickedButtonIndex:0 animated:YES];
            [self takePinInputFromUser:@"Chose 4 Digit PIN Code"];

        }else {

            [self.objSettingAdapter setPinCodeType:0];
            [self.objSettingAdapter setPinCode:userPin];

        }
    }    

}

Answer 1

请尝试以下操作。

    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:nil preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:nil];

    __weak typeof(UIAlertController) *weakAlertController = alertController;
    UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        __strong typeof(UIAlertController) *strongAlertController = weakAlertController;
        UITextField *digitTextField = [strongAlertController.textFields firstObject];
        NSString *pinCode = digitTextField.text;
        NSLog(@"pin code: %@", pinCode);
        // Do something with the PIN code
    }];

    [alertController addAction:cancelAction];
    [alertController addAction:okAction];
    [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
        textField.placeholder = @"Input 4 Digit PIN Code";
    }];

    [self presentViewController:alertController animated:YES completion:nil];

Answer 2

您可以使用 UIAlertViewController

UIAlertView不允许在iOS 10中输入文本

2 个答案: