iOS 对plist增改操作

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 = [[NSMutableDictionary alloc ] 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 = [[NSMutableDictionary alloc ] init];

    //定义第一个插件的属性

    NSMutableDictionary *plugin1 = [[NSMutableDictionary alloc]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 = [[NSMutableDictionary alloc]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 = [[[NSMutableDictionary alloc]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= [[[NSMutableDictionary alloc]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。