Question

我收到以下错误：[__NSArrayM addObject:]，NIL对象。但不是崩溃，我想知道为什么要显示这个提醒。这是我的代码

NSMutableArray *picturesCounts = [NSMutableArray array];
NSMutableArray *bigUrlArray = [NSMutableArray array];
NSMutableArray *pitcturesArray = [NSMutableArray array];
NSInteger i = 1;
for (TNHotelPictures *picture in pictures) {
    NSString *pictureCounts = [NSString stringWithFormat:@"%ld",(long)picture.images.count];
    [picturesCounts addObject:pictureCounts];
    [pitcturesArray addObject:picture.images];

    for (TNHotelDetailPhotoImages *photoImage in picture.images) {
        [bigUrlArray addObject:photoImage.bigUrl];
    }
    i++;
}
NSInteger imageInAllIndex = imageIndex;
NSMutableArray *imagesCount = [NSMutableArray array];
for (NSInteger m = 0; m<i; m++) {
    imagesCount = pitcturesArray[(typeIndex-(m+1))] ;
    imageInAllIndex += imagesCount.count;
}

NSMutableArray *array = [NSMutableArray array];
    for (NSString *url in bigUrlArray)
    {
        if (![url isKindOfClass:[NSString class]])
        {
                return;
        }
    TNHotelPhoto *photo = [[TNHotelPhoto alloc] initWithImageURL:[NSURL URLWithString:url]];
        [array addObject:photo];
    }

TNHotelPhotoSource *source = [[TNHotelPhotoSource alloc] initWithPhotos:array];
TNHotelDetailPhotoBrowserViewController *browserVC = [[TNHotelDetailPhotoBrowserViewController alloc] initWithPhotoSource:source WithImageIndex:imageInAllIndex>=0?imageInAllIndex:0 andImageArray:pictures andTypeIndex:typeIndex];

[UIManager showViewController:browserVC];

}

Answer 1

这意味着该对象已初始化并在内存中保存引用。它不是NIL。

Answer 2

查看您的代码：

for (TNHotelPictures *picture in pictures) {
    NSString *pictureCounts = [NSString stringWithFormat:@"%ld",(long)picture.images.count];
    [picturesCounts addObject:pictureCounts];
    [pitcturesArray addObject:picture.images];

    for (TNHotelDetailPhotoImages *photoImage in picture.images) {
        [bigUrlArray addObject:photoImage.bigUrl];
    }
    i++;
    }

我认为您应该检查picture其属性pictureCounts，images，bigUrl是否为零。

错误：[__ NSArrayM addObject：]，NIL对象

2 个答案: