一、简单展示NSFileManager的使用

#import 
     
      int main(int argc, const char * argv[]){    @autoreleasepool {        //创建文件管理对象        NSFileManager *fm = [NSFileManager defaultManager];        //要操作的文件名        NSString *fname = @"myfile";        //获取文件的字典        NSDictionary *attr;        //当前路径        NSString *path;        //获取当前路径        path = [fm currentDirectoryPath];        //NSLog(@"\nThe current path is : %@", path);                //检测文件是否存在        if ([fm fileExistsAtPath: fname] == NO) {            //如果不存在则建立一个文件            [fm createFileAtPath: fname contents: NULL attributes:nil];            //NSLog(@"\nThe file is not exist!");            //return 0;        }        //拷贝创建一个新文件， 新文件若已存在则报错        if ([fm copyItemAtPath: fname toPath: @"newFile" error: NULL] == NO) {            NSLog(@"\n Can't copy the file");            return 1;        }        //检测两个文件内容是否相同        if ([fm contentsEqualAtPath: fname andPath: @"newFile"] == NO) {            NSLog(@"\nThe contents is not same");            return 2;        }        //移动或者改名文件        if ([fm moveItemAtPath: @"newFile"  toPath: @"myFile2" error:NULL] == NO) {            NSLog(@"\nCan't change the name");            return 3;        }        //获取文件数据字典        if ((attr = [fm attributesOfItemAtPath: fname error:NULL]) == nil) {            NSLog(@"\nGet attributets failed");            return 4;        }        //文件大小        NSLog(@"%@", attr[NSFileSize]);        //文件类型        NSLog(@"%@", attr[NSFileType]);        //创建者        NSLog(@"%@", attr[NSFileOwnerAccountName]);        //        NSLog(@"%@", attr[NSFileCreationDate]);        //显示文件内容        NSLog(@"\n Show the file contents");        NSLog(@"\n%@", [NSString stringWithContentsOfFile: fname encoding:NSUTF8StringEncoding error:NULL]);    }    return 0;}
     

 二、通过NSData完成副本制作

1 int main(int argc, const char * argv[]) 2 { 3  4     @autoreleasepool { 5         //通过NSDate来完成文件副本制作 6         NSFileManager *fm = [NSFileManager defaultManager]; 7         NSData *dt; 8          9         dt = [fm contentsAtPath: @"myfile"];10         11         if (dt == nil) {12             NSLog(@"Read file failed....");13             return 0;14         }15         16         //将缓冲区NSData中的内容复制到文件中17         if ([fm createFileAtPath:@"myFavoriteFile" contents: dt attributes:nil] == NO) {18             NSLog(@"Creat backups failed");19             return 1;20         }21         22         //读出文件内容23         NSLog(@"\n%@", [NSString stringWithContentsOfFile:@"myFavoriteFile" encoding: NSUTF8StringEncoding error:NULL]);24     }25     return 0;26 }

三、简单的目录操作

1 #import 
     
       2  3 int main(int argc, const char * argv[]) 4 { 5  6     @autoreleasepool { 7         NSString *newDir = @"newDir"; 8         NSString *currentPath; 9         NSFileManager *fm = [NSFileManager defaultManager];10         11         //获取当前路径12         currentPath = [fm currentDirectoryPath];13         NSLog(@"\nCurrentpath is : \n%@", currentPath);14         15         //在当前目录下新建一个目录16         if ([fm createDirectoryAtPath:newDir withIntermediateDirectories:TRUE attributes:nil error:NULL] == NO) {17             NSLog(@"\nCouldn't creat the directory...");18             return 0;19         }20         21         //更改路径名22         if ([fm moveItemAtPath: newDir toPath: @"changeDir" error:NULL] == NO) {23             NSLog(@"\nChange directory name failed");24             return 2;25         }26         27         //更改当前路径28         if ([fm changeCurrentDirectoryPath:@"changeDir"] == NO) {29             NSLog(@"\nChange current directory failed");30             return 1;31         }32         NSLog(@"\nAfter change current directory.....");33         currentPath = [fm currentDirectoryPath];34         NSLog(@"\nCurrentpath is : \n%@", currentPath);35     }36     return 0;37 }