AndView | 各种自定义View、动画、界面设计、图标

There are several problems with your code, but first of all, I would recommend a different approach to accomplish what you want. As you can see below, using an instance of UIViewController is not the recommended way. Instead, use a storyboard to set up your view controller and it's components. Your code will be much smaller and your design will be easy to understand and change.

You can read more about UIViewController here

You rarely create instances of the UIViewController class directly. Instead, you create instances of UIViewController subclasses and use those objects to provide the specific behaviors and visual appearances that you need.

Here is another potential. Is fullpageCampaign.mainImage residing remotely or locally? If remotely located, then you should consider changing to NSURLSession instead.

Read more about NSData:dataWithContentsOfURL here

Do not use this synchronous method to request network-based URLs. For network-based URLs, this method can block the current thread for tens of seconds on a slow network, resulting in a poor user experience, and in iOS, may cause your app to be terminated.

Another minor thing is that you add the button to the image view. While this is OK, and might work when you allow user interaction for the image view, a cleaner way to do it is to create a UIView container to hold the image view and the button. The container can then also be the view that you attach the tap gesture recognizer to. That way, the image view can stay as a pure image.

First, create a sub-class of UIIViewController. It should look something like this:

FullPageViewController.h