iOS Plist文件操做之写入/读取/删除

• 写入数据到plist文件

•   //获取路径对象
      NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
      NSString *path = [pathArray objectAtIndex:0];
      //获取文件的完整路径
      NSString *filePatch = [path stringByAppendingPathComponent:@"xiaoxi.plist"];
      
      //上面3句能够写成这一句
  //    NSString *filePatch = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"xiaoxi.plist"];
      
  //    NSLog(@"------filepath---%@",filePatch);
      /*
       *
       下面是个人plist路径,在桌面空白处点击一下，前往－按住option-资源库-Developer-CoreSimulator-Devices......就按照下面路径找到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
       *
       */
      
      //写入数据到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];
      
      //将上面2个小字典保存到大字典里面
      NSMutableDictionary *dataDic = [NSMutableDictionary dictionary];
      [dataDic setObject:dic1 forKey:@"一年级"];
      [dataDic setObject:dic2 forKey:@"二年级"];
      //写入plist里面
      [dataDic writeToFile:filePatch atomically:YES];
      
      //读取plist文件的内容
      NSMutableDictionary *dataDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:filePatch];
      NSLog(@"---plist一开始保存时候的内容---%@",dataDictionary);

• 对plist文件内容进行/删除/修改/添加/写入操做

•  //修改字典里面的内容,先按照结构取到你想修改内容的小字典
      NSMutableDictionary *dd = [dataDictionary objectForKey:@"一年级"];
      [dd setObject:@"我更名字了哦" forKey:@"name"];
      [dd setObject:@"我添加的新内容" forKey:@"content"];
      [dd removeObjectForKey:@"age"];
      
      //修改为功之后，将这个小字典从新添加到大字典里面
      [dataDictionary setObject:dd forKey:@"一年级"];
      
      [dataDictionary writeToFile:filePatch atomically:YES];
      NSLog(@"---plist作过操做以后的字典里面内容---%@",dataDictionary);

• 删除plist文件

•     //清除plist文件，能够根据我上面讲的方式进去本地查看plist文件是否被清除
      NSFileManager *fileMger = [NSFileManager defaultManager];
      
      NSString *xiaoXiPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"xiaoxi.plist"];
      
      //若是文件路径存在的话
      BOOL bRet = [fileMger fileExistsAtPath:xiaoXiPath];
      
      if (bRet) {
          
          NSError *err;
          
          [fileMger removeItemAtPath:xiaoXiPath error:&err];
      }