一件小事，写Plist

今天项目中遇到了想将已有的一个plist文件的key、value互换，从新写入一个新的plist文件。代码如下    

//读取本地的old.plist文件

NSDictionary * facDic=[NSDictionarydictionaryWithContentsOfFile:[[NSBundlemainBundle] pathForResource:@"old"ofType:@"plist"]];

//新建可变字典存储值

NSMutableDictionary *tempDic=[[NSMutableDictionary alloc]init];

for (NSString *keyin [oldallKeys]) {

     [tempDic setValue:key forKey:old[key]];

}

//给出写入的新的plist文件的路径，写入new.plist

NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);

NSMutableString * path = [pathsobjectAtIndex:0];

//得到完整的文件名

NSString *filename=[pathstringByAppendingPathComponent:@"new.plist"];

[tempDic writeToFile:filenameatomically:YES];