圖片 64 位編碼 轉換 小記

accepted

Swift First we need to have image's NSData //Use image name from bundle to create NSData let image : UIImage = UIImage(named:"imageNameHere")! //Now use image to create into NSData format let imageData:NSData = UIImagePNGRepresentation(image)! //OR next possibility //Use image's path to create NSData let url:NSURL = NSURL(string : "urlHere")! //Now use image to create into NSData format let imageData:NSData = NSData.init(contentsOfURL: url)! Swift 2.0 > Encoding let strBase64:String = imageData.base64EncodedStringWithOptions(.Encoding64CharacterLineLength) Swift 2.0 > Decoding let dataDecoded:NSData = NSData(base64EncodedString: strBase64, options: NSDataBase64DecodingOptions.IgnoreUnknownCharacters)! Encoding : let strBase64 = imageData.base64EncodedStringWithOptions(.allZeros) print(strBase64) Decoding : let dataDecoded:NSData = NSData(base64EncodedString: strBase64, options: NSDataBase64DecodingOptions(rawValue: 0))! let decodedimage:UIImage = UIImage(data: dataDecoded)! print(decodedimage) yourImageView.image = decodedimage Objective-C iOS7 > version You can use NSData's base64EncodedStringWithOptions Encoding : - (NSString *)encodeToBase64String:(UIImage *)image { return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength]; } Decoding : - (UIImage *)decodeBase64ToImage:(NSString *)strEncodeData { NSData *data = [[NSData alloc]initWithBase64EncodedString:strEncodeData options:NSDataBase64DecodingIgnoreUnknownCharacters]; return [UIImage imageWithData:data]; } iOS 6.1 and < version First Option : Use this link to encode and decode image Add Base64 class in your project. Encoding : NSData* data = UIImageJPEGRepresentation(yourImage, 1.0f); NSString *strEncoded = [Base64 encode:data]; Decoding : NSData* data = [Base64 decode:strEncoded ];; image.image = [UIImage imageWithData:data]; Another Option: Use QSUtilities for encoding and decoding

 

 

參考連接：

1.https://stackoverflow.com/questions/11251340/convert-between-uiimage-and-base64-string

2.https://matrixzk.github.io/blog/20150122/load-image-encoded-with-base64/