ios开发中，读写文件

NSString *file = @"/Users/onlyou1991/Desktop/11.txt”;

//读取文件成字符串

NSString *dataStr = [[NSString alloc]initWithContentsOfFile:file encoding:NSUTF8StringEncoding error:nil];

//以回车换行分割字符串

NSArray *aryStr = [dataStr componentsSeparatedByString:@"\r\n”];

//将字符串str写入到文件中

[str writeToFile:file2 atomically:YES];