blocks|key|317254|text|Swift+iOS8|type|unstyled|depth|inlineStyleRanges|entityRanges|data|317255|//+prgm+mark+----+

//+convert+images+into+base64+and+keep+them+into+string

func+convertImageToBase64(image:+UIImage)+->+String+{

++++var+imageData+=+UIImagePNGRepresentation(image)
++++let+base64String+=+imageData.base64EncodedStringWithOptions(.allZeros)

++++return+base64String

}//+end+convertImageToBase64


//+prgm+mark+----

//+convert+images+into+base64+and+keep+them+into+string

func+convertBase64ToImage(base64String:+String)+->+UIImage+{

++++let+decodedData+=+NSData(base64EncodedString:+base64String,+options:+NSDataBase64DecodingOptions(rawValue:+0)+)

++++var+decodedimage+=+UIImage(data:+decodedData!)

++++return+decodedimage!

}//+end+convertBase64ToImage|code-block|syntax|javascript|317256|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Swift iOS8 </p>

<pre><code>// prgm mark ---- 

// convert images into base64 and keep them into string

func convertImageToBase64(image: UIImage) -&gt; String {

    var imageData = UIImagePNGRepresentation(image)
    let base64String = imageData.base64EncodedStringWithOptions(.allZeros)

    return base64String

}// end convertImageToBase64


// prgm mark ----

// convert images into base64 and keep them into string

func convertBase64ToImage(base64String: String) -&gt; UIImage {

    let decodedData = NSData(base64EncodedString: base64String, options: NSDataBase64DecodingOptions(rawValue: 0) )

    var decodedimage = UIImage(data: decodedData!)

    return decodedimage!

}// end convertBase64ToImage
</code></pre>


blocks|key|534211|text|@implementation+UIImage+(Extended)

-+(NSString+*)base64String+{
++++NSData+*+data+=+[UIImagePNGRepresentation(self)+base64EncodedDataWithOptions:NSDataBase64Encoding64CharacterLineLength];
++++return+[NSString+stringWithUTF8String:[data+bytes]];
}

@end|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|534212|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>@implementation UIImage (Extended)

- (NSString *)base64String {
    NSData * data = [UIImagePNGRepresentation(self) base64EncodedDataWithOptions:NSDataBase64Encoding64CharacterLineLength];
    return [NSString stringWithUTF8String:[data bytes]];
}

@end
</code></pre>


blocks|key|317328|text|在swift+2.0中使用此扩展(归功于Jonas+Franz)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|317329|extension+UIImage{
++func+toBase64()+->+String{
++++let+imageData+=+UIImagePNGRepresentation(self)!
++++return+imageData.base64EncodedStringWithOptions(.Encoding64CharacterLineLength)
++}
}|code-block|syntax|javascript|317330|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>In swift 2.0 use this extension (credit to Jonas Franz)</p>

<pre><code>extension UIImage{
  func toBase64() -&gt; String{
    let imageData = UIImagePNGRepresentation(self)!
    return imageData.base64EncodedStringWithOptions(.Encoding64CharacterLineLength)
  }
}
</code></pre>


blocks|key|317364|text|在Swift+3.0和Xcode+8.0中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|317365|编码：|317366|let+userImage:UIImage+=+UIImage(named:+"Your-Image_name")!
let+imageData:NSData+=+UIImagePNGRepresentation(userImage)!+as+NSData
let+dataImage+=+imageData.base64EncodedString(options:+.lineLength64Characters)|code-block|syntax|javascript|317367|解码：|317368|let+imageData+=+dataImage
let+dataDecode:NSData+=+NSData(base64Encoded:+imageData!,+options:.ignoreUnknownCharacters)!
let+avatarImage:UIImage+=+UIImage(data:+dataDecode+as+Data)!
yourImageView.image+=+avatarImage|317369|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

<h1>In Swift 3.0 and Xcode 8.0</h1>

<h2>Encoding :</h2>

<pre><code>let userImage:UIImage = UIImage(named: "Your-Image_name")!
let imageData:NSData = UIImagePNGRepresentation(userImage)! as NSData
let dataImage = imageData.base64EncodedString(options: .lineLength64Characters)
</code></pre>

<h2>Decoding :</h2>

<pre><code>let imageData = dataImage
let dataDecode:NSData = NSData(base64Encoded: imageData!, options:.ignoreUnknownCharacters)!
let avatarImage:UIImage = UIImage(data: dataDecode as Data)!
yourImageView.image = avatarImage
</code></pre>


blocks|key|317285|text|Swift-Extension：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|317286|extension+UIImage{
+++++func+toBase64()+->+String{
++++++++++var+imageData+=+UIImagePNGRepresentation(self)
++++++++++return+imageData.base64EncodedStringWithOptions(.allZeros)
+++++}
}|code-block|syntax|javascript|317287|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Swift-Extension:</p>

<pre><code>extension UIImage{
     func toBase64() -&gt; String{
          var imageData = UIImagePNGRepresentation(self)
          return imageData.base64EncodedStringWithOptions(.allZeros)
     }
}
</code></pre>


blocks|key|534506|text|我尝试了所有的解决方案，没有一个对我有效(使用Swift+4)，这是对我有效的解决方案，如果将来有人面临同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|534507|let+temp+=+base64String.components(separatedBy:+",")
let+dataDecoded+:+Data+=+Data(base64Encoded:+temp[1],+options:+
+.ignoreUnknownCharacters)!
let+decodedimage+=+UIImage(data:+dataDecoded)

yourImage.image+=+decodedimage|code-block|syntax|javascript|534508|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>I tried all the solutions, none worked for me (using Swift 4), this is the solution that worked for me, if anyone in future faces the same problem.</p>

<pre><code>let temp = base64String.components(separatedBy: ",")
let dataDecoded : Data = Data(base64Encoded: temp[1], options: 
 .ignoreUnknownCharacters)!
let decodedimage = UIImage(data: dataDecoded)

yourImage.image = decodedimage
</code></pre>


blocks|key|317557|text|使用便捷初始化器进行解码-+Swift+5|type|unstyled|depth|inlineStyleRanges|entityRanges|data|317558|extension+UIImage+{
++++convenience+init?(base64String:+String)+{
++++++++guard+let+data+=+Data(base64Encoded:+base64String)+else+{+return+nil+}
++++++++self.init(data:+data)
++++}
}+|code-block|syntax|javascript|317559|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Decoding using convenience initialiser - Swift 5</p>
<pre><code>extension UIImage {
    convenience init?(base64String: String) {
        guard let data = Data(base64Encoded: base64String) else { return nil }
        self.init(data: data)
    }
} 
</code></pre>


blocks|key|534332|text|See+my+class+-++AppExtension.swift


//+MARK:+-+UIImage+(Base64+Encoding)

public+enum+ImageFormat+{
++++case+PNG
++++case+JPEG(CGFloat)
}

extension+UIImage+{

++++public+func+base64(format:+ImageFormat)+->+String+{
++++++++var+imageData:+NSData
++++++++switch+format+{
++++++++case+.PNG:+imageData+=+UIImagePNGRepresentation(self)
++++++++case+.JPEG(let+compression):+imageData+=+UIImageJPEGRepresentation(self,+compression)
++++++++}
++++++++return+imageData.base64EncodedStringWithOptions(.allZeros)
++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|534333|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>See my class -  AppExtension.swift


// MARK: - UIImage (Base64 Encoding)

public enum ImageFormat {
    case PNG
    case JPEG(CGFloat)
}

extension UIImage {

    public func base64(format: ImageFormat) -&gt; String {
        var imageData: NSData
        switch format {
        case .PNG: imageData = UIImagePNGRepresentation(self)
        case .JPEG(let compression): imageData = UIImageJPEGRepresentation(self, compression)
        }
        return imageData.base64EncodedStringWithOptions(.allZeros)
    }
}
</code></pre>


blocks|key|534520|text|Swift+4.2+%7C+Xcode+10|type|unstyled|depth|inlineStyleRanges|entityRanges|data|534521|extension+UIImage+{

++++///+EZSE:+Returns+base64+string
++++public+var+base64:+String+{
++++++++return+self.jpegData(compressionQuality:+1.0)!.base64EncodedString()
++++}
}|code-block|syntax|javascript|534522|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Swift 4.2 | Xcode 10</p>

<pre><code>extension UIImage {

    /// EZSE: Returns base64 string
    public var base64: String {
        return self.jpegData(compressionQuality: 1.0)!.base64EncodedString()
    }
}
</code></pre>


blocks|key|317507|text|//convert+Image+to+Base64+(Encoding)

let+strBase64+=+imageData.base64EncodedString(options:+.lineLength64Characters)

print(strBase64)

//+convert+Base64+to+Image+(Decoding)

let+dataDecoded:NSData+=+NSData(base64EncodedString:+strBase64,+options:+NSDataBase64DecodingOptions(rawValue:+0))!

let+decodedimage:UIImage+=+UIImage(data:+dataDecoded)!

print(decodedimage)

yourImageView.image+=+decodedimage|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|317508|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>//convert Image to Base64 (Encoding)

let strBase64 = imageData.base64EncodedString(options: .lineLength64Characters)

print(strBase64)

// convert Base64 to Image (Decoding)

let dataDecoded:NSData = NSData(base64EncodedString: strBase64, options: NSDataBase64DecodingOptions(rawValue: 0))!

let decodedimage:UIImage = UIImage(data: dataDecoded)!

print(decodedimage)

yourImageView.image = decodedimage
</code></pre>


blocks|key|317246|text|对于iOS+7%2B，Objective-C，下面是如何从图像URL开始进行转换的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|317247|NSURL+*url+=+[NSURL+URLWithString:self.groove.thumbnailURL];

UIImage+*image+=+[UIImage+imageWithData:[NSData+dataWithContentsOfURL:url]];

NSString+*base64String+=+[UIImagePNGRepresentation(image)
base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];|code-block|syntax|javascript|317248|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>For iOS 7+, Objective-C, here's how to make the conversion starting with an image URL:</p>

<pre><code>NSURL *url = [NSURL URLWithString:self.groove.thumbnailURL];

UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:url]];

NSString *base64String = [UIImagePNGRepresentation(image)
base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
</code></pre>


blocks|key|534455|text|Swift+3.0和Xcode+8.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|534456|let+imageData+=+UIImageJPEGRepresentation(imageView.image!,+1)

++++let+base64String+=+(imageData!+as+Data).base64EncodedString(options:+NSData.Base64EncodingOptions(rawValue:+0))
++++print(base64String)|code-block|syntax|javascript|534457|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Swift 3.0 and Xcode 8.0</p>

<pre><code>let imageData = UIImageJPEGRepresentation(imageView.image!, 1)

    let base64String = (imageData! as Data).base64EncodedString(options: NSData.Base64EncodingOptions(rawValue: 0))
    print(base64String)
</code></pre>


<p>Does anyone know how to convert a <code>UIImage</code> to a Base64 string, and then reverse it?</p>

<p>I have the below code; the original image before encoding is good, but I only get a blank image after I encode and decode it.</p>

<pre><code>NSData *imageData = UIImagePNGRepresentation(viewImage);

NSString *b64EncStr = [self encode: imageData];

NSString *base64String = [self encodeBase64:imageData];
</code></pre>


Convert between UIImage and Base64 string

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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有人知道如何将UIImage转换为Base64字符串，然后将其反转吗？我有以下代码；编码前的原始图像是好的，但我只有在编码和解码后才得到空白图像。NSData *imageData = UIImagePNGRepresentation(viewImage);NSString *b64EncStr = [self encode: imageData];NSString *base64String =

问在UIImage和Base64字符串之间转换
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回答 12

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问在UIImage和Base64字符串之间转换
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