字符串写入文件

#import <Foundation/Foundation.h>//写入文件int main(int argc, const char * argv[]){    @autoreleasepool {        NSString * str = @"你是一只小狗 ";        //创建路径        NSString * path =@"/Users/ms/Desktop/hello/my.txt";        NSError * error;        //第一个参数给出路径        //atomically:YES                BOOL isWriteSucess = [str writeToFile:path atomically:YES encoding:NSUTF8StringEncoding error:&error];                if(isWriteSucess)        {            NSLog(@"写入成功");        }        else        {            NSLog(@"写入失败");        }        //NSLog(@"%@",error);    }        return 0;}