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=[pathArrayobjectAtIndex:0]; //获取文件的完整路径 NSString*filePatch=[pathstringByAppendingPathComponent:@"column.plist"]; NSLog(@"%@",filePatch); //写入数据到plist文件 NSMutableDictionary*dic1=[NSMutableDictionarydictionaryWithObjectsAndKeys:@"小小虎",@"name",@"5",@"age",@"boy",@"sex",nil]; NSMutableDictionary*dic2=[NSMutableDictionarydictionaryWithObjectsAndKeys:@"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=[NSMutableDictionarydictionary]; [dataDicsetObject:dic1forKey:@"一年级"]; [dataDicsetObject:dic2forKey:@"二年级"]; //写入plist里面 [dataDicwriteToFile:filePatchatomically:YES]; //读取plist文件的内容 NSMutableDictionary*dataDictionary=[[NSMutableDictionaryalloc]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=[dataDictionaryobjectForKey:@"一年级"]; [ddsetObject:@"我改名字了哦"forKey:@"name"]; [ddsetObject:@"我添加的新内容"forKey:@"content"]; [ddremoveObjectForKey:@"age"]; //修改成功以后，将这个小字典重新添加到大字典里面 [dataDictionarysetObject:ddforKey:@"一年级"]; [dataDictionarywriteToFile:filePatchatomically: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=[NSFileManagerdefaultManager];
NSString*xiaoXiPath=[[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES)objectAtIndex:0]stringByAppendingPathComponent:@"xiaoxi.plist"];
//如果文件路径存在的话
BOOLbRet=[fileMgerfileExistsAtPath:xiaoXiPath];
if(bRet){
NSError*err;
[fileMgerremoveItemAtPath:xiaoXiPatherror:&err];
}
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