Question

CRASH是：

此应用程序正在从后台线程修改autolayout引擎，这可能导致引擎损坏和奇怪的崩溃。这将在将来的版本中引发异常。

很明显，问题是每次更改ui都必须在主线程上完成。理论上这可能有用

dispatch_async(dispatch_get_main_queue(), {
    // code here
})

我的职能是：

- (void)requestInBlock:(NSString *)keyThumbnails withArrayQuantity:(NSMutableArray *)quantityArray andOriginalQuantity:(NSInteger)originalQuantity
{
    int limit = 5;

    NSMutableArray *arrayFive = [[NSMutableArray alloc] init];
    NSInteger idQuantityOriginalCount = [quantityArray count];

    for (NSInteger i = 0; i < MIN(limit, idQuantityOriginalCount); i ++) {
        [arrayFive addObject:[quantityArray objectAtIndex:0]];
        [quantityArray removeObjectAtIndex:0];
    }

    NSInteger idLimitArrayCount = [arrayFive count];

    NSInteger __block countProductsRequestLimit = 0;
    for (NSNumber *j in arrayFive) {
        UIImageView * thumbnailImageView = [[UIImageView alloc] initWithFrame:CGRectMake(xposThumbnails, 0, ratio * 2, 47)];
        [thumbnailsView addSubview:thumbnailImageView];

        NSURL *imageUrl = [NSURL URLWithString:[NSString stringWithFormat:@"https://s3-us-west-2.amazonaws.com/xxxxxxxxxxxxxx/%@_%@.jpg",keyThumbnails,j]];

        [Utils loadFromURL:imageUrl callback:^(UIImage *image) {

            countProductsRequestLimit++;
            countThumbnailsGlobal++;

            [thumbnailImageView setImage:image];
            [cutVideoScroll addSubview:thumbnailsView];

            if (!image) {
                NSMutableDictionary *collectInfoFailImage = [[NSMutableDictionary alloc] init];
                [collectInfoFailImage setValue:thumbnailImageView forKey:@"image"];
                [collectInfoFailImage setValue:imageUrl forKey:@"imageUrl"];
                [thumbnailsWithError addObject:collectInfoFailImage];
                collectInfoFailImage = nil;
            }
            if (countThumbnailsGlobal == originalQuantity) {
                [arrayFive removeAllObjects];
                [self performSelector:@selector(reloadThumbnailsWithError) withObject:nil afterDelay:3];
            } else if (idLimitArrayCount == countProductsRequestLimit) {
                [arrayFive removeAllObjects];
                [self requestInBlock:keyThumbnails withArrayQuantity:quantityArray andOriginalQuantity:originalQuantity];
            }
        }];

        xposThumbnails += (ratio * 2);
    }
    loadingTimeLine.layer.zPosition = -1;
    lblloadingTimeLine.layer.zPosition = -1;
}

我认为错误发生在loadFromURL。（ 对此不太确定，因为在我进行测试的所有设备中，这种情况从未发生过，有人通知我并向我发送了错误日志 ）

我的问题是：

此代码的哪一部分可能正在修改autoLayout，可能是[cutVideoScroll addSubview:thumbnailsView];？
为什么只出现在iPod上？

更新：

我正在测试。

dispatch_async(dispatch_get_main_queue(), ^{
   [thumbnailImageView setImage:image];
   [cutVideoScroll addSubview:thumbnailsView];
});

但错误仍然存在。

感谢您的时间。

Answer 1

你做对了，添加了子视图来查看触发器table.show-my-request-table tr td:first-child { background-color: #ff0000; }。所以你应该只在主线程中添加视图。

也许您在任何覆盖的方法中都有专门用于iPhone / iPod的代码？

Answer 2

这似乎是两件事的组合。

dispatch_async(dispatch_get_main_queue(), ^{
   [thumbnailImageView setImage:image];
   [cutVideoScroll addSubview:thumbnailsView];
});

并且在所有情况下，无论验证thumbnailImageView

，他都被添加到image if (! image)

仅在iPod中崩溃

2 个答案: