ios 将数据写入到文件
原文:http://blog.sina.com.cn/s/blog_7a2f0a83010133u6.html

-(void)writeConfigFile
{
//第一：读取documents路径的方法：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) ; //得到documents的路径，为当前应用程序独享

NSString *documentD = [paths objectAtIndex:0];


NSString *configFile = [documentD stringByAppendingPathComponent:@"collection.plist"]; //得到documents目录下dujw.plist配置文件的路径




NSMutableDictionary *configList =[[NSMutableDictionary alloc] initWithContentsOfFile:configFile]; //初始化字典，读取配置文件的信息
//NSMutableDictionary *configList =[[NSMutableDictionary alloc] dictionaryWithContentsOfFile:configFile];


//第二：写入文件file
//if (!configList) { //第一次，文件没有创建，因此要创建文件，并写入相应的初始值。

configList = [[NSMutableDictionary alloc] initWithObjectsAndKeys: namestr,petHospitalN,
addrestr,petHospitalA,tellNumberstr,petHospitalT,regionstr,PetHospitalR ,Characteristicstr,petHospitalC,nil];

[configList writeToFile:configFile atomically:YES];

//}

[file writeToFile:configFile atomically:YES];
}