UICollectionView Cell Performance Issues with Complex Custom Views in Objective-C
I'm confused about I'm stuck on something that should probably be simple. I'm experiencing severe performance issues when scrolling a `UICollectionView` that uses a complex custom view as its cells. The custom view contains multiple subviews, including labels, images, and buttons. When I scroll the collection view, it stutters, and the scrolling experience is far from smooth. I've implemented the standard methods, such as `cellForItemAtIndexPath:`, and I'm reusing cells properly, but it seems that the layout and rendering of my custom view are causing bottlenecks. Here’s a simplified version of my `UICollectionViewCell` implementation: ```objective-c @interface MyCustomCell : UICollectionViewCell @property (nonatomic, strong) UIImageView *myImageView; @property (nonatomic, strong) UILabel *myLabel; // Other subviews... @end @implementation MyCustomCell - (instancetype)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { _myImageView = [[UIImageView alloc] init]; _myLabel = [[UILabel alloc] init]; // Add subviews and layout constraints } return self; } @end ``` In the `cellForItemAtIndexPath:` method, I also preload images asynchronously, but I’m not sure if I'm doing it efficiently. Here’s how I’m currently setting up the cell: ```objective-c - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath { MyCustomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"MyCustomCellIdentifier" forIndexPath:indexPath]; // Configure cell... // Assume images are preloaded and assigned here return cell; } ``` I get occasional warnings in the console about `"The operation couldn’t be completed. (com.apple.CoreGraphics error 5570.)"`, but it’s not clear what’s causing it. I've already tried profiling with Instruments, and it shows high CPU usage during scrolling. What strategies can I implement to improve the performance of my `UICollectionView` and reduce the stuttering? Are there any best practices for managing complex custom views in cells? Any insights would be greatly appreciated! My development environment is macOS. Has anyone else encountered this? My development environment is Windows 11. What am I doing wrong? This is my first time working with Objective-C 3.9. Hoping someone can shed some light on this.