iOS 简单文件操作

小灰灰 2022-09-24 01:25 188阅读 0赞

#import <Foundation/Foundation.h>
    
    int main(int argc, const char * argv[]) {
        @autoreleasepool {
     
            
            
    //------文件名处理----------常用NSString提供操作文件路径名方法
            
            
           // 返回路径的组成部分
           NSString *path = @"/Users/yubo/text.txt";
           NSArray *array = [path pathComponents];
           NSLog(@"array--%@",array);
            
            // 返回最后组成的部分---文件的名称
            NSString *str = [path lastPathComponent];
            NSLog(@"str-->%@",str);
            
            // 追加
            path = [path stringByAppendingPathComponent:@"maizi"];
            NSLog(@"%@",path);
    
            
            
            
    //-------文件数据源处理  NSData， 数据进行编码和解码处理-----------
            
            NSString *msg = @"maizi_today";
            NSData *data = [msg dataUsingEncoding:NSUTF8StringEncoding];
            msg = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
            NSLog(@"msg-->%@",msg);
            
            
            
    //--------- 开始文件真正的操作方法。
            
    //        Documents：存放长期使用的文件(一般存放目录)
    //        Library：系统存放文件
    //        tmp：临时文件，app重启时，该目录下得文件清空
            
            
            
            NSArray *documentArrary = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, true);
            
            NSLog(@"%@",documentArrary);
            
            
            NSArray *libArray = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, true);
            
            NSLog(@"%@",libArray);
            
            
    // 文件操作类处理---------------------NSFileManager
            
            
            // 创建文件
            
            NSString *homePath = NSHomeDirectory();
            NSLog(@"%@",homePath);
            
            homePath =  [homePath stringByAppendingPathComponent:@"Document/file_maizi.txt"];
            
            NSFileManager *fileManager = [NSFileManager defaultManager];
            NSString *fileContent = @"码农的自我修养";
            NSData *fileData = [fileContent dataUsingEncoding:NSUTF8StringEncoding];
            bool flag = [fileManager createFileAtPath:homePath contents:fileData attributes:nil];
            if (flag) {
                NSLog(@"文件创建成功");
            }else{
                NSLog(@"文件创建失败");
            }
            
            // 创建文件
            NSString  *filePaths = NSHomeDirectory();
            filePaths = [filePaths stringByAppendingPathComponent:@"maiziTest/maiziFile"];
            NSError *error;
            NSFileManager *manager = [NSFileManager defaultManager];
            bool fileFlag = [manager createDirectoryAtPath:filePaths withIntermediateDirectories:true attributes:nil error:&error];
            if (fileFlag) {
                NSLog(@"文件创建成功");
            }
            
            
            // 读取文件
            NSData *datas = [manager contentsAtPath:homePath];
            NSString *dataMsg = [[NSString alloc]initWithData:datas encoding:NSUTF8StringEncoding];
            NSLog(@"文件内容--->%@",dataMsg);
            
            
            // 移动文件
            bool moveFlag = [manager moveItemAtPath:homePath toPath:filePaths error:&error];
            if (moveFlag) {
                
                NSLog(@"文件移动成功");
            }else{
            
                NSLog(@"%@",error.description);
            
            }
            
            
            // 复制文件
            
            bool copyFlag = [manager copyItemAtPath:homePath toPath:filePaths error:&error];
            if (copyFlag) {
                NSLog(@"复制文件成功");
            }else{
              
                NSLog(@"error is %@",error.description);
            
            }
            
            // 删除文件
            
    //        bool exist = [manager fileExistsAtPath:homePath];
    //        if (exist) {
    //            
    //            bool  removeFlag = [manager removeItemAtPath:homePath error:&error];
    //            if (removeFlag) {
    //                  NSLog(@"删除成功");
    //            }
    //        }
            // 查看文件属性
            NSDictionary *dic = [manager attributesOfItemAtPath:filePaths error:nil];
            NSLog(@"%@",dic);
            
            
            
            
            
            
    //--------------   NSFileHandle       文件的读写操作
            
            
            
                // 字符串直接写入文件
            
                NSString *strA = @"------我是麦子";
                bool writerSuccess = [strA writeToFile:homePath atomically:NO encoding:NSUTF8StringEncoding error:nil];
                if (writerSuccess) {
                    NSLog(@"文件写入成功");
                }
            
               NSString *contentA = [NSString stringWithContentsOfFile:homePath encoding:NSUTF8StringEncoding error:nil];
            
               NSLog(@"%@",contentA);
            
              // NSdata 直接读写
            
             NSData *dataA = [NSData dataWithContentsOfFile:homePath];
            NSString *strB = [[NSString alloc]initWithData:dataA encoding:NSUTF8StringEncoding];
             NSLog(@"---->%@",strB);
            
            
            NSString *strC = @"我是Data数据，你是哪一位";
            NSData *dataC = [strC dataUsingEncoding:NSUTF8StringEncoding];
            bool dataSuccess = [dataC writeToFile:homePath atomically:NO];
            
            
            dataA = [NSData dataWithContentsOfFile:homePath];
            NSString *newWord = [[NSString alloc]initWithData:dataA encoding:NSUTF8StringEncoding];
            NSLog(@"-data直接获取数据--->%@",newWord);
           
            
            
            
            // NSArray 直接写入文件----------这种直接写入的，会默认给你创建文件,但是不会给你创建文件夹。
            NSArray *dataArray = @[@"android",@"ios"];
            NSString *arrayFile = NSHomeDirectory();
            arrayFile = [arrayFile stringByAppendingPathComponent:@"Documents/array.plist"];
            bool  success2 = [dataArray writeToFile:arrayFile atomically:true];
            if (success2) {
                NSLog(@"写入成功");
            }else{
                NSLog(@"写入失败");
               
            }
            
            
            // dictory 字典写入文件
            
            NSDictionary *fileDic = @{ @"name" : @"maizi_today",
                                   @"age"  : @"27"
                                   
                                   };
            NSString  *dicFile = NSHomeDirectory();
            dicFile = [dicFile stringByAppendingPathComponent:@"Document/dicFile.plist"];
            
            bool dicSuccess = [fileDic writeToFile:dicFile atomically:true];
            if (dicSuccess) {
                 NSLog(@"字典保存成功");
            }else{
                 NSLog(@"字典保存失败");
            }
            
            
            
            // 文件进行处理，内容文件追加处理。
            
            NSString *strD = @"无线互联";
            
            NSString *fileD = NSHomeDirectory();
            fileD = [fileD stringByAppendingPathComponent:@"hahaha.txt"];
            
            bool successD = [strD writeToFile:fileD atomically:true encoding:NSUTF8StringEncoding error:nil];
            if (successD) {
                NSLog(@"写入成功");
            }
            
            // 追加--写
            
            NSFileHandle *handle = [NSFileHandle fileHandleForWritingAtPath:fileD];
            [handle seekToEndOfFile];
            
            NSString *msgD = @".......我是新加入的字符串.......";
            NSData *dataD = [msgD dataUsingEncoding:NSUTF8StringEncoding];
            
            [handle writeData:dataD];
            // 记得关闭文件。
            [handle closeFile];
            
            
            
            NSString *newMsg = [NSString stringWithContentsOfFile:fileD encoding:NSUTF8StringEncoding error:nil];
            NSLog(@"newMsg--->%@",newMsg);
            
            
        }
        return 0;
    }