Question

很简单，我想使用UIImagePicker拍摄照片并将其放入NSMutableArray。我在下面的代码如下。相机部件工作正常，出于测试目的，图像显示在名为 photoImageView 的UIImage中。但是我似乎无法将图像添加到数组中。任何帮助都感激不尽。

@property (nonatomic, retain) NSMutableArray *photos;

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *photoTaken = (UIImage *)[info valueForKey:UIImagePickerControllerOriginalImage];
photoImageView.image=photoTaken;
[photos addObject:[UIImage photoTaken];
[picker dismissViewControllerAnimated:YES completion:nil];
}

Answer 1

您是否已将数组实例化到某处（例如viewDidLoad）：

self.photos = [NSMutableArray alloc] init];

Answer 2

1）你是否正在初始化照片NSMutableArray？有时addObject：在尝试将对象插入NULL NSArray时不会抛出错误。

2）

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    UIImage *photoTaken = (UIImage *)[info valueForKey:UIImagePickerControllerOriginalImage];
    if (photoTaken)
    {
        photoImageView.image=photoTaken;
        [photos addObject:photoTaken];
    }else{
        NSLog(@"Selected photo is NULL");
    }
    [picker dismissViewControllerAnimated:YES completion:nil];
}

Answer 3

添加到（Ian L）

后修改如下

     [photos addObject: photoTaken];

Answer 4

photoTaken已经被实例化为UIImage个对象。无需这样做：

[photos addObject : [UIImage photoTaken]];

只需这样做：

[photos addObject : photoTaken];

从UIImagePicker到NSMutableArray的图像

4 个答案: