UITapGestureRecognizer calling another class

问题

I am having an issue setting up a UITapGestureRecognizer calling a shared class across my app.

Basically I have a bunch of images that if tapped will popup another view with that image and comments. Instead of using initWithTarget using self I want to call the function from a shared class that can be loaded into each type of Navigation Controller.

I am able to initialize ImageClass *imageClass = [[ImageClass alloc]init] and call the functions fine by [imageClass DoThis] however when I add it to a UITapGestureRecognizer the app crashes.

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:imageClass action:@selector(DoThis)];

Also if I include the DoThis function and initWithTarget:self everything works as expected however I'd like to not write the DoThis function into every View Controller if possible I'd like it to fire directly from the UITapGestureRecognizer.

Thanks in advance for any insight you can give me into what I'm doing wrong.

回答1:

Alright basically I the imageClass object was getting deallocated every time a new image appeared. I moved that logic to the controller and all started working fine.

Thanks for helping out MSK!

来源：https://stackoverflow.com/questions/12287217/uitapgesturerecognizer-calling-another-class