iOS 对plist增改操作

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这篇文章是自己通过实践获取,在网上查过很多资料,也走了不上的弯路,由于刚开始学子不久,只是把自己遇到的问题贡献给大家

一,创建文件   

    

    //获取路径对象

   NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);

   //获取完整路径

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *plistPath = [documentsDirectory stringByAppendingPathComponent:@"test.plist"];

   NSMutableDictionary *dictplist = [[NSMutableDictionaryalloc ] init];

   //设置属性值

    [dictplist setObject:@"张三" forKey:@"name"];

    [dictplist setObject:@"李四"forKey:@"name1"];

    [dictplist setObject:@"王五"forKey:@"name2"];

   //写入文件

    [dictplist writeToFile:plistPath atomically:YES];

这个是创建了一个简单的plist文件,创建后的图1为:


下面是创建了一种多键值的plist文件,代码和图如下:

 

//获取路径对象

   NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);  

   //获取完整路径

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *plistPath = [documentsDirectory stringByAppendingPathComponent:@"test.plist"];

   NSMutableDictionary *dictplist = [[NSMutableDictionaryalloc ] init];

   //定义第一个插件的属性

   NSMutableDictionary *plugin1 = [[NSMutableDictionaryalloc]init];

    [plugin1 setObject:@"张三"forKey:@"name1"];

    [plugin1 setObject:@"李四"forKey:@"name2"];

   //定义第二个插件的属性

   NSMutableDictionary *plugin2 = [[NSMutableDictionaryalloc]init];

    [plugin2 setObject:@"王五"forKey:@"name1"];

    [plugin2 setObject:@"赵斌"forKey:@"name2"];

   //设置属性值

    [dictplist setObject:plugin1 forKey:@"初一班"];

    [dictplist setObject:plugin2 forKey:@"初二班"];

   //写入文件

    [dictplist writeToFile:plistPath atomically:YES];

      

图2:

    

针对图1进行修改的程序,代码如下:

    NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES)       objectAtIndex:0]stringByAppendingPathComponent:@"test.plist"];    

   NSMutableDictionary *applist = [[[NSMutableDictionaryalloc]initWithContentsOfFile:path]mutableCopy];    

    NSString *name = [applist objectForKey:@"name"];    

    name = @"山山";   

    [applist setObject:name forKey:@"name"];

    [applist writeToFile:path atomically:YES];

执行后如下图:

    


针对图2进行修改的程序,代码如下:

   

   

      [dictplist writeToFile:plistPath atomically:YES];

   NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"test.plist"];

    

   //根据路径获取test.plist的全部内容

    NSMutableDictionary *infolist= [[[NSMutableDictionaryalloc]initWithContentsOfFile:path]mutableCopy];

    

    

    //获取初一班的信息

    NSMutableDictionary *info = [infolist objectForKey:@"初一班"];

    

    NSString *name1 = [info objectForKey:@"name1"];

    

    name1 = @"山山";

    

    [info setValue:name1 forKey:@"name1"];

    [infolist setValue:info forKey:@"初一班"];

    [infolist writeToFile:path atomically:YES];


图如下:

    

以上两个修改信息的地方,必须要加入红色标记的方法,才能在表里进行增改操作。

以上是个人的学习心得,请大家多多指教。

    

    



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