iPhone开发－创建、读取、写入文件
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?? //获取数据?
?? NSData *reader = [NSData dataWithContentsOfFile:path];
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?? //获取字节的个数
??? int length = [reader length];
??? NSLog(@"------->bytesLength:%d", length);
??? for(int i = 0; i < length; i++)
??? {
??????? //读取数据
??? ??? [reader getBytes:&b range:NSMakeRange(i, sizeof(b))];
??? ??? NSLog(@"-------->data%d:%d", i, b);????
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??? }
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