<?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"];

    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");

    //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);

    //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");

    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");}