我在用
imageData = UIImagePNGRepresentation(imgvw.image);
并张贴
[dic setObject:imagedata forKey:@"image"];
后
NSData * data = [NSJSONSerialization dataWithJSONObject：dic options：NSJSONWritingPrettyPrinted error：& theError];
由于未捕获的异常’NSInvalidArgumentException’,现在应用程序正在崩溃终止应用程序,原因：’JSON写入中的无效类型(NSConcreteMutableData)
解决方法
您需要将UIImage转换为NSData,然后将该NSData转换为NSString,它将是您数据的base64字符串表示形式.
从NSData *获得NSString *后,您可以将其添加到密钥@“image”的字典中
要将NSData转换为base64类型NSString *,请参阅以下链接：
How do I do base64 encoding on iphone-sdk?
以更伪的方式,该过程将如下所示
UIImage *my_image; //your image handle
NSData *data_of_my_image = UIImagePNGRepresentation(my_image);
NSString *base64StringOf_my_image = [data_of_my_image convertToBase64String];
//now you can add it to your dictionary
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
[dict setObject:base64StringOf_my_image forKey:@"image"];
if ([NSJSONSerialization isValidJSONObject:dict]) //perform a check
{
NSLog(@"valid object for JSON");
NSError *error = nil;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error];
if (error!=nil) {
NSLog(@"Error creating JSON Data = %@",error);
}
else{
NSLog(@"JSON Data created successfully.");
}
}
else{
NSLog(@"not a valid object for JSON");
}
