iOS 对plist文件进行读写,增删改查的实例

对plist文件进行读写

//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:@"column.plist"]; 
   
  nslog(@"%@",filepatch); 
   
  //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pilst文件进行修改

//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:@"我改名字了哦" forkey:@"name"]; 
  [dd setobject:@"我添加的新内容" forkey:@"content"]; 
  [dd removeobjectforkey:@"age"]; 
   
  //修改成功以后，将这个小字典重新添加到大字典里面 
  [datadictionary setobject:dd forkey:@"一年级"]; 
   
  [datadictionary writetofile:filepatch atomically:yes]; 
  nslog(@"---plist做过操作之后的字典里面内容---%@",datadictionary); 

删除

//清除plist文件，可以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"]; 
    
  //如果文件路径存在的话 
  bool bret = [filemger fileexistsatpath:xiaoxipath]; 
    
  if (bret) { 
      
    nserror *err; 
      
    [filemger removeitematpath:xiaoxipath error:&err]; 
  } 

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