小编Nil*_*Jha的帖子

我正在尝试对 collectionView 中的单元格重新排序，但未调用 collectionView delgate 方法。我已经正确设置了代表。

• (void)collectionView:(UICollectionView *)collectionView moveItemAtIndexPath:(NSIndexPath )sourceIndexPath toIndexPath:(NSIndexPath )destinationIndexPath

这是我的工作代码。

- (void)viewDidLoad {
    [super viewDidLoad];
    UILongPressGestureRecognizer *longGesture=[[UILongPressGestureRecognizer alloc] init];
    [longGesture addTarget:self action:@selector(handleGesture:)];
    [self.collectionView addGestureRecognizer:longGesture];
    NSLog(@"The array is %@",dataArray);
    self.collectionView.delegate=self;
    [_collectionView reloadData];
    // Do any additional setup after loading the view, typically from a nib.
}

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return [dataArray count];
}

// The cell that is returned must be retrieved from a call to -dequeueReusableCellWithReuseIdentifier:forIndexPath:
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    MyCollectionViewCell *cell …

NSData *_secretData = [strValue dataUsingEncoding:NSUTF8StringEncoding]

我正在尝试在 Xamarin iOS 中转换它。但我没有在 Xamarin iOS 中获得 dataUsingEncoding 选项