获取DocumentsPath路径简单文件写入

最新推荐文章于 2020-09-24 20:04:24 发布

原创最新推荐文章于 2020-09-24 20:04:24 发布 · 1.3k 阅读

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本文介绍了如何在iOS应用中使用Objective-C进行文件系统操作，包括访问不同类型的目录（如Home、Documents、Library等），以及如何对NSString、NSArray和NSDictionary进行写入和读取操作。

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//访问沙盒路径
    
    
    //1.Home主目录,里面有 :Documents.Library.temp 和一个应用程序
    
   // NSLog(@"Home:%@",NSHomeDirectory());
  
    //2,Documents
    NSString *DocumentsPath=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];
    NSLog(@"Documents:%@",DocumentsPath);
    
    //3.Library
    NSString *LinraryPath=NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES)[0];
    NSLog(@"Library:%@",LinraryPath);
    
    //4.temp

    NSLog(@"temp:%@",NSTemporaryDirectory());
    
    //5.caches
    NSString *cachesPath=NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
    NSLog(@"caches:%@",cachesPath);
    
    
    //6.user
    NSString *userPath=NSUserName();
    NSLog(@"user:%@",userPath);
    
    //7.NSBoundle
    NSString *boundle=[[NSBundle mainBundle]pathForResource:@"89" ofType:@"png"];
    NSLog(@"bundle:%@",boundle);

NSString写入

    //简单文件写入,
    //NSString写入
    //1.写入的路径
    NSString *doucmentPath=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)[0];

    NSLog(@"%@",doucmentPath);
    //2.拼接文件路径
    NSString *filePath=[doucmentPath stringByAppendingString:@"/myText.txt"];
    
    //3.准备写入的内容
    NSString *content=@"Hello World.";
    //4.写入
    [content writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
    //5.读取
    NSString *readString=[NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
    NSLog(@"readString:%@",readString);

NSArray写入

 
    //NSArray写入
    //1.获取doucuments路径
    //2.拼接文件路径
    NSString *arrayFile=[doucmentPath stringByAppendingString:@"/array.plist"];
    //3.准备内容
    NSArray *array=@[@"123",@"456,",@"780"];
    //4.写入
    [array writeToFile:arrayFile atomically:YES];
    //读取
    NSArray *readArray=[NSArray arrayWithContentsOfFile:arrayFile];
    NSLog(@"readArray:%@",readArray);

NSDictionary写入

 
    //NSDictionary写入
    //1.获取doucuments路径
    //2.拼接文件路径
    NSString *dicFile=[doucmentPath stringByAppendingString:@"/dic.plist"];
    //3.准备内容
    NSDictionary *dic=[NSDictionary dictionaryWithObject:@"8888" forKey:@"a"];
    //4.写入
    [dic writeToFile:dicFile atomically:YES];
    //读取
    NSDictionary *readDic=[NSDictionary dictionaryWithContentsOfFile:dicFile];
    NSLog(@"readDic:%@",readDic);