为什么collectionViewCells不在iOS中显示？

您好，我可以从gallery中获取图像，但是collectionViewCells没有显示在UI上。我拖放collectionView提供了到委托和数据源方法的连接。但是为什么没有获取collectionViewCells。我编写了这样的代码

- (void)viewDidLoad  
{ 
imagesArray = [NSMutableArray array]; 
[self.collectionView registerNib:[UINib nibWithNibName:@"MyCell" bundle:nil] forCellWithReuseIdentifier:@"CELL"]; 
}   

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info  
{ 
inputImage= info[UIImagePickerControllerEditedImage]; [imagesArray addObject:inputImage];
[picker dismissViewControllerAnimated:YES completion:nil];
} 

-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView; {
return 1;
} 

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

- (MyCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 
{ 
MyCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CELL" forIndexPath:indexPath];
if(!cell) { 
cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CELL"forIndexPath:indexPath];
}
recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image =[imagesArray objectAtIndex:indexPath.row];        
[collectionView reloadData];
return cell;
}

---

请任何人向我建议如何执行此操作。非常感谢您的帮助

请确保您有带数据的

imageArray

。并尝试在

imagePickerController:didFinishPickingMediaWithInfo:

方法中重新加载

collectionView

- (void)viewDidLoad { 
 imagesArray = [NSMutableArray array]; 
 [self.collectionView registerNib:[UINib nibWithNibName:@"MyCell" bundle:nil] forCellWithReuseIdentifier:@"CELL"]; 
      }  

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 

inputImage= info[UIImagePickerControllerEditedImage];
[imagesArray addObject:inputImage];
[self.collectionView reloadData];
[picker dismissViewControllerAnimated:YES completion:nil];
}

-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView; {
return 1;
}

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

- (MyCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 
{ 
MyCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CELL" forIndexPath:indexPath];
if(!cell) { 
cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"CELL"forIndexPath:indexPath];
}
recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image =[imagesArray objectAtIndex:indexPath.row]; 
return cell;
}

---

问题是您正在调用cellForItemAtIndexPath中的重载数据。这将导致无限循环。

是否将单元格设置为xib文件，而不是脚本？将recipeImageView的子视图添加到单元格中。[cell.contentview addsubview:recipeImageView]；我制作了cell in.xib rdelmarIs recipeImageView如果你记录它的话会显示为非零吗？是的，它显示为非零..我可以以NSMutableArrays的形式获取图像，谢谢你给出了很好的答案rdelmar..现在工作了