Question

如何使用从AlertView输入的文本？在这个例子中，我使用AlertView输入一个电话号码，然后存储在textfield.text（下面的代码）中。我想在同一.m文件中包含的另一个方法中使用此数据。如何从另一种方法中正确引用此输入（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之一。第一个选项是为您的班级中的电话号码设置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，您可以使用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);
}

使用AlertView文本输入

1 个答案: