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。

转载自：http://my.oschina.net/panyong/blog/262992