简单的theos调整失败

Question

我是Theos的新手，所以我决定尝试从教程中进行简单的调整。调整编译和安装正确，但是当我使用iOS 8.1 SDK在iOS 8.4的iPad mini上进行测试时，它无法正常工作。这是我使用的教程代码的副本：

%hook SBApplicationIcon
    -(void)launch
    {
    NSString *appName = [self displayName];
    NSString *message = [NSString stringWithFormat:@"The app %@ has been launched", appName, nil];
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:appName message:message delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alert show];
        [alert release];
        %orig;
    }
    %end