iOS Plist文件操做之寫入/讀取/刪除

• 寫入數據到plist文件

•   //獲取路徑對象
      NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
      NSString *path = [pathArray objectAtIndex:0];
      //獲取文件的完整路徑
      NSString *filePatch = [path stringByAppendingPathComponent:@"xiaoxi.plist"];
      
      //上面3句能夠寫成這一句
  //    NSString *filePatch = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"xiaoxi.plist"];
      
  //    NSLog(@"------filepath---%@",filePatch);
      /*
       *
       下面是個人plist路徑,在桌面空白處點擊一下，前往－按住option-資源庫-Developer-CoreSimulator-Devices......就按照下面路徑找到plist所在的位置
       *
      /Users/baiteng01/Library/Developer/CoreSimulator/Devices/92444384-5241-4934-B078-1A7241F1B687/data/Containers/Data/Application/73005382-D1FB-4BC2-BB4E-1FBC64284141/Documents/xiaoxi.plist
       *
       */
      
      //寫入數據到plist文件
      NSMutableDictionary *dic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"小小虎",@"name",@"5",@"age",@"boy",@"sex",nil];
      
      NSMutableDictionary *dic2 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"小小兮",@"name",@"6",@"age",@"girl",@"sex",nil];
      
      //將上面2個小字典保存到大字典裏面
      NSMutableDictionary *dataDic = [NSMutableDictionary dictionary];
      [dataDic setObject:dic1 forKey:@"一年級"];
      [dataDic setObject:dic2 forKey:@"二年級"];
      //寫入plist裏面
      [dataDic writeToFile:filePatch atomically:YES];
      
      //讀取plist文件的內容
      NSMutableDictionary *dataDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:filePatch];
      NSLog(@"---plist一開始保存時候的內容---%@",dataDictionary);

• 對plist文件內容進行/刪除/修改/添加/寫入操做

•  //修改字典裏面的內容,先按照結構取到你想修改內容的小字典
      NSMutableDictionary *dd = [dataDictionary objectForKey:@"一年級"];
      [dd setObject:@"我更名字了哦" forKey:@"name"];
      [dd setObject:@"我添加的新內容" forKey:@"content"];
      [dd removeObjectForKey:@"age"];
      
      //修改爲功之後，將這個小字典從新添加到大字典裏面
      [dataDictionary setObject:dd forKey:@"一年級"];
      
      [dataDictionary writeToFile:filePatch atomically:YES];
      NSLog(@"---plist作過操做以後的字典裏面內容---%@",dataDictionary);

• 刪除plist文件

•     //清除plist文件，能夠根據我上面講的方式進去本地查看plist文件是否被清除
      NSFileManager *fileMger = [NSFileManager defaultManager];
      
      NSString *xiaoXiPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"xiaoxi.plist"];
      
      //若是文件路徑存在的話
      BOOL bRet = [fileMger fileExistsAtPath:xiaoXiPath];
      
      if (bRet) {
          
          NSError *err;
          
          [fileMger removeItemAtPath:xiaoXiPath error:&err];
      }