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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