NSMutableData对象中移除最末六位的字节,对象如下:
NSMutableData *reducedDataPacket = [[NSMutableData alloc] init];
reducedDataPacket = [myCompressedData copy];
NSRange range = NSMakeRange([reducedDataPacket length]-6, 6);
[reducedDataPacket replaceBytesInRange:range withBytes:NULL length:0];
但是执行会引发崩溃:
-[NSConcreteData replaceBytesInRange:withBytes:length:]: unrecognized selector sent to instance 0x1f037870
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSConcreteData replaceBytesInRange:withBytes:length:]: unrecognized selector sent to instance 0x1f037870
感谢您的回答!