//獲取文件路徑

    NSString *path = [[NSBundlemainBundle] pathForResource:@"user.plist"ofType:@""];

    //獲取數據

    NSMutableDictionary* dict =  [ [ NSMutableDictionaryalloc ] initWithContentsOfFile:path ];

    NSString* object = [ dict objectForKey:@"aaa" ];

    NSLog(object);

 摘自 凡娃軟件

    //修改數據

    NSMutableDictionary* dict = [ [ NSMutableDictionaryalloc ] initWithContentsOfFile:path ];

    [ dict setObject:textview.text forKey:@"bbb" ];

    [ dict writeToFile:path atomically:YES ];