使用JSQMessagesCollectionView时，“ UICollectionView必须使用非nil布局参数初始化”

Question

I am using JSQMessagesViewController to add chat functionality to my app. Inside a UIViewController, I initialised a JSQMessagesCollectionView thus:

JSQMessagesCollectionView *jsq = [[JSQMessagesCollectionView alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
[self.view addSubview:jsq];

This however, is giving me this error:

'NSInvalidArgumentException', reason: 'UICollectionView must be initialized with a non-nil layout parameter'

How would I include the view inside my view controller? A brief explanation would be much appreciated.

Answer 1

In JSQMessagesCollectionView , there is no public method to initialize the class from your class. But there is one private init method available ie - (instancetype)initWithFrame:(CGRect)frame collectionViewLayout:(UICollectionViewLayout *)layout .

This is the reason you are getting nil .

As per documentation, better to use JSQMessagesViewController .

Hope the solution helps.