react-native-fast-image/ios/FastImage/FFFastImageView.m

#import "FFFastImageView.h"

@implementation FFFastImageView

- (void)setResizeMode:(RCTResizeMode)resizeMode
{
    if (_resizeMode != resizeMode) {
        _resizeMode = resizeMode;
        self.contentMode = (UIViewContentMode)resizeMode;
    }
}

- (void)setSource:(FFFastImageSource *)source {
    if (_source != source) {
        _source = source;
        // Set headers.
        [source.headers enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSString* header, BOOL *stop) {
            [[SDWebImageDownloader sharedDownloader] setValue:header forHTTPHeaderField:key];
        }];

        // Set priority.
        SDWebImageOptions options = 0;
        options |= SDWebImageRetryFailed;
        switch (source.priority) {
            case FFFPriorityLow:
                options |= SDWebImageLowPriority;
                break;
            case FFFPriorityNormal:
                // Priority is normal by default.
                break;
            case FFFPriorityHigh:
                options |= SDWebImageHighPriority;
                break;
        }

        // Load the new source.
        [self sd_setImageWithURL:source.uri
                placeholderImage:nil
                         options:options
                        progress:^(NSInteger receivedSize, NSInteger expectedSize, NSURL * _Nullable targetURL) {
                            double progress = MIN(1, MAX(0, (double) receivedSize / (double) expectedSize));
                            if (_onFastImageProgress) {
                                _onFastImageProgress(@{ @"progress": @(progress) });
                            }

                        } completed:^(UIImage * _Nullable image,
                                      NSError * _Nullable error,
                                      SDImageCacheType cacheType,
                                      NSURL * _Nullable imageURL) {
                            if (error) {
                                if (_onFastImageError) {
                                    _onFastImageError(@{});
                                }
                            } else {
                                if (_onFastImageLoad) {
                                    _onFastImageLoad(@{});
                                }
                            }
                        }];
    }
}

@end