使用GridView使用exc_bad_access，可能的内存管理失败了吗？

Question

I have the following code that tries to set up a GridView and I have a GridviewController subclass that manages the datasource. This is the code that is used to set it up.

            AQGridView* gridView = [[AQGridView alloc] initWithFrame:frame];
            NUBMyCpGridviewController* controller = [[NUBMyCpGridviewController alloc] init];
            gridView.dataSource = controller;
            gridView.delegate = controller;
            [gridView reloadData];

However, the app crashes when it tries to access the datasource. This is the line (in the Gridview class) that gives the tries to call the method and crashes it:

AQGridViewCell * cell = [_dataSource gridView: self cellForItemAtIndex: index];

The error is exc_bad_access. What could be the problem? Is it because the object is being released too early? How can I rectify it?

Answer 1

You're right; the problem is most likely that your NUBMyCpGridviewController is being deallocated. Based on your code snippet it looks like no one is retaining it.

My suggestion would be to make it a strong @property of whichever class your snippet code is being executed in.