无法更改 UICollectionView (iOS) 上的背景颜色
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Unable to change background color on UICollectionView (iOS)
提问by daydr3am3r
I'm writing my first iOS app and I seam to be having some problems in changing the backgroundColor of a UICollectionView.
我正在编写我的第一个 iOS 应用程序，但我在更改 UICollectionView 的背景颜色时遇到了一些问题。
The app has a navigation controller and certain views. Initially, I was able to change the color in my AppDelegate implementation file:
该应用程序具有导航控制器和某些视图。最初，我能够更改 AppDelegate 实现文件中的颜色：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
feedsList = [[FeedsListTVC alloc] init];
rootNC = [[RootNC alloc] init];
rootNC.viewControllers = [NSMutableArray arrayWithObjects:feedsList, nil];
self.window.rootViewController = rootNC;
return YES;
}
Using
使用
self.window.backgroundColor = [UIColor whiteColor];
I was able to change the background color on all my views. However, I decided to add one more view (the UICollectionView) and to set it as the main view. So I changed the AppDelegate to this:
我能够更改所有视图的背景颜色。但是，我决定再添加一个视图（UICollectionView）并将其设置为主视图。所以我把 AppDelegate 改成这样：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
CollectionViewLayoutCVL *collectionViewLayout = [[CollectionViewLayoutCVL alloc] init];
self.viewController = [[MainViewControllerCVC alloc] initWithCollectionViewLayout:collectionViewLayout];
rootNC = [[RootNC alloc] init];
rootNC.viewControllers = [NSMutableArray arrayWithObjects:viewController, nil];
self.window.rootViewController = rootNC;
return YES;
}
From my point of view this looks mostly the same.
从我的角度来看，这看起来基本相同。
I also tried this inside the implementation file of the UICollectionView but this changes the color of the view controller not the color of the Collection's view as far as I can tell:
我也在 UICollectionView 的实现文件中尝试过这个，但是据我所知，这改变了视图控制器的颜色而不是集合视图的颜色：
self.view.backgroundColor = [UIColor whiteColor];
Any ideas?
有任何想法吗？
回答by Saheb Roy
self.collectionView.backgroundColor = [UIColor yourColor];
self.collectionView.backgroundColor = [UIColor yourColor];
Hope this helps
希望这可以帮助
回答by Desert Rose
UIView *redView = [UIView new];
redView.backgroundColor = [UIColor redColor];
_collectionView.backgroundView = redView;
