nsmutabledata专题
Object-C 中各数据类型转换 NSData NSMutableData NSString Byte UIImage 合并音频
1，NSData 与 NSString NSData –> NSString NSString *aString = [[NSString alloc] initWithData:adata encoding:NSUTF8StringEncoding];11 NSString –> NSData NSString *aString = @"1234";NSData *aD