ios - 仅在iPod中崩溃

Question

CRASH是:

This application is modifying the autolayout engine from a background thread, which can lead to engine corruption and weird crashes.  This will cause an exception in a future release.

显然，问题在于每次更改ui都必须在主线程上完成。从理论上讲这可能有效

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。 ( 对此不确定，因为在我进行测试的所有设备中，这种情况永远不会发生，外面的人会通知我并向我发送错误日志)

My question is:

此代码的哪一部分可能正在修改autoLayout，也许是[cutVideoScroll addSubview:thumbnailsView];？

为什么只在iPod上出现？

更新:

我正在测试。

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

但是错误仍然存​​在。

谢谢你的时间。

Answer 1

正确无误，添加了 subview 以查看触发器layoutSubviews。因此，您应该仅在主线程中添加addViews。

也许您有任何重写的方法专门针对iPhone / iPod编写了一些代码？