这里是我想要的代码如何转换图像的NSData这NSData的要的NSString
NSData *imageData = [[NSData alloc]initWithData:UIImagePNGRepresentation(myImage.image)];
imageClass.imageString = [[NSString alloc]initWithData:imageData encoding:NSUTF8StringEncoding];
NSLog(@"String is :%@",imageClass.imageString); // getting NULL
获取字符串是:空
检查这个答案:http://stackoverflow.com/questions/8804359/saving-images-in-string-format-to-use -in-xml-not-working ..有一个用于base64编码和解码的实现 – sujith1406 2012-02-16 09:18:30