static BOOL SDImageCacheOldShouldDecompressImages = YES;
static BOOL SDImagedownloderOldShouldDecompressImages = YES;

- (void)viewDidLoad {
    [super viewDidLoad];

    //設(shè)置圖片緩存方式 防止圖片過大崩潰的情況
    SDImageCache *canche = [SDImageCache sharedImageCache];
    SDImageCacheOldShouldDecompressImages = canche.config.shouldDecompressImages;
    canche.config.shouldDecompressImages = NO;
    
    SDWebImageDownloader *downloder = [SDWebImageDownloader sharedDownloader];
    SDImagedownloderOldShouldDecompressImages = downloder.shouldDecompressImages;
    downloder.shouldDecompressImages = NO;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
    [[SDWebImageManager sharedManager].imageCache clearMemory];
    [[SDWebImageManager sharedManager].imageCache clearDiskOnCompletion:nil];
    
}

- (void)dealloc {    

    [[SDImageCache sharedImageCache] clearMemory];
    
    SDImageCache *canche = [SDImageCache sharedImageCache];
    canche.config.shouldDecompressImages = SDImageCacheOldShouldDecompressImages;
    
    SDWebImageDownloader *downloder = [SDWebImageDownloader sharedDownloader];
    downloder.shouldDecompressImages = SDImagedownloderOldShouldDecompressImages;
}