{"id":15305,"date":"2022-10-11T04:10:58","date_gmt":"2022-10-10T22:40:58","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-image-optimization-like-whatsapp-and-instagram-in-ios-and-android\/"},"modified":"2022-10-11T04:10:58","modified_gmt":"2022-10-10T22:40:58","slug":"solved-image-optimization-like-whatsapp-and-instagram-in-ios-and-android","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-image-optimization-like-whatsapp-and-instagram-in-ios-and-android\/","title":{"rendered":"[Solved] Image optimization like whatsapp and instagram in ios and android"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-40130651\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"40130651\" data-parentid=\"40130578\" data-score=\"2\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Try this code:<\/p>\n<pre><code>+(UIImage *)scaleAndRotateImage:(UIImage *)image {\nint kMaxResolution = 640; \/\/ Or whatever\n\nCGImageRef imgRef = image.CGImage;\n\nCGFloat width = CGImageGetWidth(imgRef);\nCGFloat height = CGImageGetHeight(imgRef);\n\n\nCGAffineTransform transform = CGAffineTransformIdentity;\nCGRect bounds = CGRectMake(0, 0, width, height);\nif (width &gt; kMaxResolution || height &gt; kMaxResolution) {\n    CGFloat ratio = width\/height;\n    if (ratio &gt; 1) {\n        bounds.size.width = kMaxResolution;\n        bounds.size.height = roundf(bounds.size.width \/ ratio);\n    }\n    else {\n        bounds.size.height = kMaxResolution;\n        bounds.size.width = roundf(bounds.size.height * ratio);\n    }\n}\n\nCGFloat scaleRatio = bounds.size.width \/ width;\nCGSize imageSize = CGSizeMake(CGImageGetWidth(imgRef), CGImageGetHeight(imgRef));\nCGFloat boundHeight;\nUIImageOrientation orient = image.imageOrientation;\nswitch(orient) {\n\n    case UIImageOrientationUp: \/\/EXIF = 1\n        transform = CGAffineTransformIdentity;\n        break;\n\n    case UIImageOrientationUpMirrored: \/\/EXIF = 2\n        transform = CGAffineTransformMakeTranslation(imageSize.width, 0.0);\n        transform = CGAffineTransformScale(transform, -1.0, 1.0);\n        break;\n\n    case UIImageOrientationDown: \/\/EXIF = 3\n        transform = CGAffineTransformMakeTranslation(imageSize.width, imageSize.height);\n        transform = CGAffineTransformRotate(transform, M_PI);\n        break;\n\n    case UIImageOrientationDownMirrored: \/\/EXIF = 4\n        transform = CGAffineTransformMakeTranslation(0.0, imageSize.height);\n        transform = CGAffineTransformScale(transform, 1.0, -1.0);\n        break;\n\n    case UIImageOrientationLeftMirrored: \/\/EXIF = 5\n        boundHeight = bounds.size.height;\n        bounds.size.height = bounds.size.width;\n        bounds.size.width = boundHeight;\n        transform = CGAffineTransformMakeTranslation(imageSize.height, imageSize.width);\n        transform = CGAffineTransformScale(transform, -1.0, 1.0);\n        transform = CGAffineTransformRotate(transform, 3.0 * M_PI \/ 2.0);\n        break;\n\n    case UIImageOrientationLeft: \/\/EXIF = 6\n        boundHeight = bounds.size.height;\n        bounds.size.height = bounds.size.width;\n        bounds.size.width = boundHeight;\n        transform = CGAffineTransformMakeTranslation(0.0, imageSize.width);\n        transform = CGAffineTransformRotate(transform, 3.0 * M_PI \/ 2.0);\n        break;\n\n    case UIImageOrientationRightMirrored: \/\/EXIF = 7\n        boundHeight = bounds.size.height;\n        bounds.size.height = bounds.size.width;\n        bounds.size.width = boundHeight;\n        transform = CGAffineTransformMakeScale(-1.0, 1.0);\n        transform = CGAffineTransformRotate(transform, M_PI \/ 2.0);\n        break;\n\n    case UIImageOrientationRight: \/\/EXIF = 8\n        boundHeight = bounds.size.height;\n        bounds.size.height = bounds.size.width;\n        bounds.size.width = boundHeight;\n        transform = CGAffineTransformMakeTranslation(imageSize.height, 0.0);\n        transform = CGAffineTransformRotate(transform, M_PI \/ 2.0);\n        break;\n\n    default:\n        [NSException raise:NSInternalInconsistencyException format:@\"Invalid image orientation\"];\n\n}\n\nUIGraphicsBeginImageContext(bounds.size);\nCGContextRef context = UIGraphicsGetCurrentContext();\n\nif (orient == UIImageOrientationRight || orient == UIImageOrientationLeft) {\n    CGContextScaleCTM(context, -scaleRatio, scaleRatio);\n    CGContextTranslateCTM(context, -height, 0);\n}\nelse {\n    CGContextScaleCTM(context, scaleRatio, -scaleRatio);\n    CGContextTranslateCTM(context, 0, -height);\n}\n\nCGContextConcatCTM(context, transform);\n\nCGContextDrawImage(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, width, height), imgRef);\nUIImage *imageCopy = UIGraphicsGetImageFromCurrentImageContext();\nUIGraphicsEndImageContext();\n\nCGFloat scaleSize = 0.2f;\nUIImage *smallImage = [UIImage imageWithCGImage:imageCopy.CGImage\n                                          scale:scaleSize\n                                    orientation:imageCopy.imageOrientation];\n\nreturn smallImage;\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Image optimization like whatsapp and instagram in ios and android <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Try this code: +(UIImage *)scaleAndRotateImage:(UIImage *)image { int kMaxResolution = 640; \/\/ Or whatever CGImageRef imgRef = image.CGImage; CGFloat width = CGImageGetWidth(imgRef); CGFloat height = CGImageGetHeight(imgRef); CGAffineTransform transform = CGAffineTransformIdentity; CGRect bounds = CGRectMake(0, 0, width, height); if (width &gt; kMaxResolution || height &gt; kMaxResolution) { CGFloat ratio = width\/height; if (ratio &gt; 1) &#8230; <a title=\"[Solved] Image optimization like whatsapp and instagram in ios and android\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-image-optimization-like-whatsapp-and-instagram-in-ios-and-android\/\" aria-label=\"More on [Solved] Image optimization like whatsapp and instagram in ios and android\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[452,3414,1192,3957,471],"class_list":["post-15305","post","type-post","status-publish","format-standard","hentry","category-solved","tag-android","tag-bitmap","tag-image","tag-image-optimization","tag-ios"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] Image optimization like whatsapp and instagram in ios and android - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-image-optimization-like-whatsapp-and-instagram-in-ios-and-android\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Image optimization like whatsapp and instagram in ios and android - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Try this code: +(UIImage *)scaleAndRotateImage:(UIImage *)image { int kMaxResolution = 640; \/\/ Or whatever CGImageRef imgRef = image.CGImage; CGFloat width = CGImageGetWidth(imgRef); CGFloat height = CGImageGetHeight(imgRef); CGAffineTransform transform = CGAffineTransformIdentity; CGRect bounds = CGRectMake(0, 0, width, height); if (width &gt; kMaxResolution || height &gt; kMaxResolution) { CGFloat ratio = width\/height; if (ratio &gt; 1) ... 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