编码的Base64图像数据无效

Question

我尝试在Base64中对图像进行编码，并且我得到一个看起来正确的字符串，但是当我尝试在PHP中加载图像时，我从iOS获取了一个不正确的错误文件。 （我的Android版本的应用程序会放入可以读取的有效base64文件）

这是我的代码：

if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
        let imageData = UIImagePNGRepresentation(pickedImage)

        var encodedImageData = imageData!.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0)) as NSString
        let range = NSMakeRange(0, encodedImageData.length)
        encodedImageData = encodedImageData.stringByReplacingOccurrencesOfString("+", withString: "%2B", options: NSStringCompareOptions.LiteralSearch, range: range)
        encodedImageData = encodedImageData.stringByReplacingOccurrencesOfString("/", withString: "%2F", options: NSStringCompareOptions.LiteralSearch, range: range)
        let utilisateurId = PlistManager.sharedInstance.getValueForKey("id")

我尝试了很多配置，但我无法获得一个有效的配置。

在Android尺寸上：

bitmapLoaded.compress(Bitmap.CompressFormat.PNG, 100, baos); //bm is the bitmap object
                 byte[] b = baos.toByteArray();
                 String encodedImage = Base64.encodeToString(b, Base64.DEFAULT);

Answer 1

从相机获取图像。

Bitmap bmp1 = (Bitmap) data.getExtras().get("data");
mBitmap = Bitmap.createScaledBitmap(bmp1, 300, 300, true);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
mBitmap.compress(Bitmap.CompressFormat.JPEG, 70, baos);
byte[] imageByte = baos.toByteArray();
String encoded = Base64.encodeToString(imageByte, Base64.DEFAULT);
Log.d("tag", "base64 : " + encoded);

来自画廊，

Uri selectedImageUri = data.getData();

    String[] filePathColumn = {MediaStore.Images.Media.DATA};
    Cursor cursor = getContentResolver().query(selectedImageUri, filePathColumn, null, null, null);
    cursor.moveToFirst();
    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
    String picturePath = cursor.getString(columnIndex);
    cursor.close();
    Bitmap bmp = BitmapFactory.decodeFile(picturePath);
    Bitmap newbmp = Bitmap.createScaledBitmap(bmp, 600, 600, true);

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    newbmp.compress(Bitmap.CompressFormat.JPEG, 70, baos);
    byte[] imageByte = baos.toByteArray();
    String encoded = Base64.encodeToString(imageByte, Base64.DEFAULT);

已编辑的答案

我们如何在IOS中获得base64

Swift 3（iOS 10 +）

let plainString = "foo"

编码

let plainData = plainString.data(using: String.Encoding.utf8)
let base64String = plainData?.base64EncodedString()
print(base64String!) // Zm9v

解码

if let decodedData = Data(base64Encoded: base64String!),
   let decodedString = String(data: decodedData, encoding:  String.Encoding.utf8) {
  print(decodedString) // foo
}

Swift＆lt; 3

let plainString = "foo"

编码

let plainData = plainString.dataUsingEncoding(NSUTF8StringEncoding)
let base64String = plainData?.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))
print(base64String!) // Zm9v

解码

let decodedData = NSData(base64EncodedString: base64String!, options: NSDataBase64DecodingOptions(rawValue: 0))
let decodedString = NSString(data: decodedData, encoding: NSUTF8StringEncoding)
print(decodedString) // foo

的Objective-C

NSString *plainString = @"foo";

编码

NSData *plainData = [plainString dataUsingEncoding:NSUTF8StringEncoding];
NSString *base64String = [plainData base64EncodedStringWithOptions:0];
NSLog(@"%@", base64String); // Zm9v

解码

NSData *decodedData = [[NSData alloc] initWithBase64EncodedString:base64String options:0];
NSString *decodedString = [[NSString alloc] initWithData:decodedData encoding:NSUTF8StringEncoding];
NSLog(@"%@", decodedString); // foo 

希望这会对你有所帮助。