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我想做一個簡單的例子。UINavgationController中的UICollectionView
我有一個rootViewController這是一個UINavgationController，並且在那UINavgationController有一個UIViewController。現在我想在UIViewController中創建UICollectionView，但是出現錯誤。
這裏是代碼：
#import "AppDelegate.h"
#import "XJViewController.h"
@interface AppDelegate()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
XJViewController *xjv = [[XJViewController alloc]init];
UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:xjv];
self.window.rootViewController = nav;
[self.window makeKeyAndVisible];
return YES;
}
#import <UIKit/UIKit.h>
@interface XJViewController : UIViewController<UICollectionViewDelegate,UICollectionViewDataSource>
@end
#import "XJViewController.h"
@interface XJViewController()
@end
@implementation XJViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor whiteColor];
self.title = @"XJ";
self.navigationController.navigationBar.barTintColor = [UIColor redColor];
NSDictionary *dicColor = @{NSForegroundColorAttributeName : [UIColor whiteColor]};
self.navigationController.navigationBar.titleTextAttributes = dicColor;
UICollectionViewFlowLayout *fLayout = [[UICollectionViewFlowLayout alloc]init];
UICollectionView *cv = [[UICollectionView alloc]initWithFrame:self.view.bounds collectionViewLayout:fLayout];
[cv registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"myeCell"];
cv.dataSource = self;
cv.delegate = self;
[self.view addSubview:cv];
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return 4;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"myCell" forIndexPath:indexPath];
cell.backgroundColor = [UIColor redColor];
return cell;
}
***終止應用程序由於未捕獲的異常 'NSInternalInconsistencyException'，理由是：「不能出列類型的視圖 ：UICollectionElementKindCell與標識了myCell - 必須 註冊一個筆尖或類的標識符或連接原型 單元格中的故事板'
請幫我弄清楚什麼是概率lem是。