使用AlertView文本输入

Question

如何使用从AlertView输入的文本？在本例中，我使用AlertView输入一个电话号码，然后存储在textfield.text中(下面的代码)。我想在包含在同一个.m文件中的另一个方法中使用这些数据。如何正确引用其他方法中的输入(电话号码)数据？

- (void) alertView: (UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    // Capture the phone number input from the alert pop-up window. UIAlertView Delegate added to allow the OS trigger this method to read the data.

    if (alertView.tag == 12) {
        if (buttonIndex == 1) {
            UITextField *textfield = [alertView textFieldAtIndex:0];
            NSLog(@"phonenumber: %@", textfield.text);

        }

    }

}

Answer 1

你可能需要做两件事中的一件。第一个选项是在类中为您的电话号码设置一个ivar或属性：

@implementation SomeViewController {
    NSString* _phoneNumber;
}

- (void) alertView: (UIAlertView *)alertView clickedButtonAtIndex (NSInteger)buttonIndex
{
    // Capture the phone number input from the alert pop-up window. UIAlertView Delegate added to allow the OS trigger this method to read the data.

    if (alertView.tag == 12) {
        if (buttonIndex == 1) {
            UITextField *textfield = [alertView textFieldAtIndex:0];
            _phoneNumber = textField.text;
        }
    }
}

- (void)someOtherMethod {
    NSLog(@"phonenumber: %@", _phoneNumber);
}
@end

或者，您可以让其他方法将电话号码文本作为参数：

- (void) alertView: (UIAlertView *)alertView clickedButtonAtIndex (NSInteger)buttonIndex
{
    // Capture the phone number input from the alert pop-up window. UIAlertView Delegate added to allow the OS trigger this method to read the data.

    if (alertView.tag == 12) {
        if (buttonIndex == 1) {
            UITextField *textfield = [alertView textFieldAtIndex:0];
            [self someOtherMethodThatHandlesAPhoneNumber:textField.text];
        }
    }
}

- (void)someOtherMethodThatHandlesAPhoneNumber:(NSString*)phoneNumber {
    NSLog(@"phonenumber: %@", phoneNumber);
}