Ios NSMutableArray在向数组添加UIImage后返回nil

我想获取在photoLibrary中拍摄的最后一张照片，并将其添加到将在UIActivityViewController中使用的数组中。显示UIActivityViewController时，图像不会显示，并且似乎从未将UIImage添加到阵列中

这是我的

NSMutableArray *items = [[NSMutableArray alloc]init];
[items addObject:@"someText"];

PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init];
fetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:YES]];
PHFetchResult *fetchResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:fetchOptions];
PHAsset *lastAsset = [fetchResult lastObject];


__block UIImage *shareImage;

PHImageRequestOptions* options = [[PHImageRequestOptions alloc]init];
options.resizeMode = PHImageRequestOptionsResizeModeExact;
options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
options.version = PHImageRequestOptionsVersionUnadjusted;
options.synchronous = YES;


[[PHImageManager defaultManager] requestImageForAsset:lastAsset


    targetSize:PHImageManagerMaximumSize
    contentMode:PHImageContentModeDefault
    options:PHImageRequestOptionsVersionCurrent
    resultHandler:^(UIImage *result, NSDictionary *info) {

    dispatch_async(dispatch_get_main_queue(), ^{



    shareImage = result;
    [items addObject:shareImage];  });



}];

NSMutableArray *activityItems = [NSMutableArray arrayWithArray:items];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
[self presentViewController:activityViewController animated:YES completion:nil];

任何帮助都将不胜感激。我对iOS开发和编程都是新手，我在这方面经历了一段非常艰难的时光

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谢谢

您的

项目

数组中实际添加了

UIImage

。创建

activityItems

数组并显示

UIActivityViewController

时，添加

UIImage

的块可能尚未完成。如果您将呈现逻辑添加到块中（将图像添加到阵列后），它应该可以工作

- (void)yourMethod {
    NSMutableArray *items = [[NSMutableArray alloc] init];
    [items addObject:@"someText"];

    PHFetchOptions *fetchOptions = [[PHFetchOptions alloc] init];
    fetchOptions.sortDescriptors = @[[NSSortDescriptor sortDescriptorWithKey:@"creationDate" ascending:YES]];
    PHFetchResult *fetchResult = [PHAsset fetchAssetsWithMediaType:PHAssetMediaTypeImage options:fetchOptions];
    PHAsset *lastAsset = [fetchResult lastObject];

    PHImageRequestOptions *options = [[PHImageRequestOptions alloc]init];
    options.resizeMode = PHImageRequestOptionsResizeModeExact;
    options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;
    options.version = PHImageRequestOptionsVersionUnadjusted;
    options.synchronous = YES;

    [[PHImageManager defaultManager] requestImageForAsset:lastAsset
                                               targetSize:PHImageManagerMaximumSize
                                              contentMode:PHImageContentModeDefault
                                                  options:PHImageRequestOptionsVersionCurrent
                                            resultHandler:^(UIImage *result, NSDictionary *info) {
                                                dispatch_async(dispatch_get_main_queue(), ^{
                                                    [items addObject:result];

                                                    [self presentActivityControllerWithItems:items];
                                                });
                                            }];
}

- (void)presentActivityControllerWithItems:(NSArray *)items {
    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
    [self presentViewController:activityViewController animated:YES completion:nil];
}

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你的代码很难读懂。请将其粘贴回去，并按照您在屏幕上看到的格式对其进行格式化。此外，您还没有具体说明出了什么问题。好的，我调整了代码，并在问题中添加了更多细节。调用UIActivityViewController时，UIImage未显示。似乎未将UIImage添加到阵列中。谢谢你的回复。这也正是我所想的。您是说我应该在[items addObject:shareImage]；？下安装UIActivityViewController吗？？这就是我所做的，但它不起作用。谢谢你的回复！文本（它是用UIImage实现的。安德烈，你帮了我很大的忙！！非常感谢你的帮助。