?// SDWebImage? -> ?Core? -> SDImageIOCoder.m- (UIImage *)decodedImageWithData:(NSData *)data options:(nullable SDImageCoderOptions *)options {if (!data) {return nil;}CGFloat scale = 1;NSNumber *scaleFactor = options[SDImageCoderDecodeScaleFactor];if (scaleFactor != nil) {scale = MAX([scaleFactor doubleValue], 1) ;}UIImage *image = [[UIImage alloc] initWithData:data scale:scale];image.sd_imageFormat = [NSData sd_imageFormatForImageData:data];// 大于50k就對圖片進行壓縮if (data.length/1024 > 50) {image = [self compressImageWith:image];}return image; }// add by jack on 20190814 -(UIImage *)compressImageWith:(UIImage *)image {float imageWidth = image.size.width;float imageHeight = image.size.height;float width = 200;//640float height = image.size.height/(image.size.width/width);float widthScale = imageWidth /width;float heightScale = imageHeight /height;// 創建一個bitmap的context// 并把它設置成為當前正在使用的contextUIGraphicsBeginImageContext(CGSizeMake(width, height));if (widthScale > heightScale) {[image drawInRect:CGRectMake(0, 0, imageWidth /heightScale , height)];}else {[image drawInRect:CGRectMake(0, 0, width , imageHeight /widthScale)];}// 從當前context中創建一個改變大小后的圖片UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();// 使當前的context出堆棧UIGraphicsEndImageContext();return newImage; }

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轉載于:https://my.oschina.net/jack088/blog/3092991

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