plist第一次看到这个后缀名文件的时候感觉怪怪的,不过接触久了也就习以为常了,plist是Property List的简称可以理解成属性列表文件,主要用来存储串行化后的对象的文件。扩展名为.plist,因此被称为 plist文件,xCode中默认的是一种树状的结构展现出来数据,可视化的动态增删改查,非常人性化,不过最终的结果是以XML形式存储的,Plist文件可以用于存储用户的一些设置信息,具体根据需求而定。
简单创建文件就是说可以直接从xCode创建,右击项目new File,可以添加一个plist文件:
创建一个UserData.plist文件,之后的内容如下:
右击open as->source code,代码如下:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Login</key> <dict> <key>UserName</key> <string>FlyElephant</string> <key>UserPassWord</key> <string>123456</string> </dict> </dict> </plist>
读取设置的信息:
//读取Property List文件 NSString *userDataPath = [[NSBundle mainBundle] pathForResource:@"UserData" ofType:@"plist"]; NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile:userDataPath]; NSLog(@"%@",data); NSLog(@"用户名:%@ 密码:%@", data[@"Login"][@"UserName"],data[@"Login"][@"UserPassWord"]); [data setObject:@"登录信息" forKey:@"Login"];
文件添加,上面是应用程序中添加文件,这个时候可以选择代码在沙盒中添加,代码如下:
NSArray *sandboxpath= NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); //获取完整路径 NSString *documentsDirectory = [sandboxpath objectAtIndex:0]; NSString *plistPath = [documentsDirectory stringByAppendingPathComponent:@"sandbox.plist"]; //存储根数据 NSMutableDictionary *rootDic = [[NSMutableDictionary alloc ] init]; //字典中的详细数据 NSMutableDictionary *userDataDic = [[NSMutableDictionary alloc]init]; [userDataDic setObject:@"Flephant" forKey:@"UserName"]; [userDataDic setObject:@"http://www.cnblogs.com/xiaofeixiang/" forKey:@"UserPassWord"]; [rootDic setObject:userDataDic forKey:@"Login"]; //写入文件 [rootDic writeToFile:plistPath atomically:YES]; NSLog(@"%@",NSHomeDirectory()); NSLog(@"写入成功");
路径如下,具体路径获取上一篇文章已经可以看到:
读取数据:
//获取路径 NSArray *sandboxpath= NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *filePath = [[sandboxpath objectAtIndex:0] stringByAppendingPathComponent:@"sandbox.plist"]; NSLog(@"%@",NSHomeDirectory()); //获取数据 NSMutableDictionary *searchdata = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath]; NSLog(@"%@",searchdata);
修改文件:
//获取路径 NSString *filepath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"sandbox.plist"]; //所有的数据列表 NSMutableDictionary *datalist= [[[NSMutableDictionary alloc]initWithContentsOfFile:filepath]mutableCopy]; //获取Login节点 NSMutableDictionary *loginData = [datalist objectForKey:@"Login"]; [loginData setValue: @"FlyElephant" forKey:@"UserName"]; [loginData setValue: @"123456" forKey:@"UserPassWord"]; [datalist setValue:loginData forKey:@"Login"]; [datalist writeToFile:filepath atomically:YES]; NSLog(@"修改成功");
删除文件:
NSFileManager *manager=[NSFileManager defaultManager]; //文件路径 NSString *filepath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"sandbox.plist"]; if ([manager removeItemAtPath:filepath error:nil]) { NSLog(@"文件删除成功"); }