添加到收藏夹功能iPhone
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我正在尝试在我的应用程序上使用“添加到收藏夹”功能。我似乎无法正常工作。基本上，每次我的手机重新启动时，所有收藏夹都会从数组和字典中删除。无论如何，有没有保存此数据的信息，以便每次启动应用程序时都可以保存和还原这些数据？非常感谢。
以下是一些代码：在appDidFinishLaunching中：
//============== Add To Favourites ==============
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@\"Saved.data\"];
NSArray *pathsArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryArray = [pathsArray objectAtIndex:0];
NSString *filePathArray = [documentsDirectoryArray stringByAppendingPathComponent:@\"savedArray.data\"];
delegateFavouritesDictionary = [NSMutableDictionary dictionary];
[delegateFavouritesDictionary writeToFile:filePath atomically:YES];
delegateFavouritesArray = [[NSMutableArray alloc]init];
self.addToFavouritesArray = [[NSMutableArray alloc] init];
self.addToFavouritesDictionary = [NSMutableDictionary dictionary];
TabBar_NavigationBasedAppDelegate *mainDelegate = (TabBar_NavigationBasedAppDelegate *)[[UIApplication sharedApplication]delegate];
//addToFavouritesArray = [[NSMutableArray alloc] init];
NSMutableArray *tempArray1 = mainDelegate.delegateFavouritesArray;
//NSMutableDictionary *tempDictionary1 = mainDelegate.delegateFavouritesDictionary;
addToFavouritesArray = tempArray1;
//self.addToFavouritesDictionary = tempDictionary1;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@\"Saved.data\"];
addToFavouritesDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];
NSString *ID = [[NSUserDefaults standardUserDefaults]objectForKey:@\"ID\"];
if([[addToFavouritesDictionary allKeys] containsObject:ID]) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@\"Saved.data\"];
[addToFavouritesDictionary removeObjectForKey:ID];
[addToFavouritesArray removeObject:Name];
[favouritesButton setTitle:@\"+ Favourites\" forState:(UIControlState)UIControlStateNormal];
[addToFavouritesDictionary writeToFile:filePath atomically: YES];
NSLog(@\"New Dictionary: %@\", addToFavouritesDictionary);
} else {
[addToFavouritesArray addObject:Name];
NSString *ID = [[NSUserDefaults standardUserDefaults]objectForKey:@\"ID\"];
[addToFavouritesDictionary setObject:Name forKey:ID];
[favouritesButton setTitle:@\"- Favourites\" forState:(UIControlState)UIControlStateNormal];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@\"Saved.data\"];
[addToFavouritesDictionary writeToFile:filePath atomically: YES];
NSLog(@\"Mutable Dictionary: %@\", addToFavouritesDictionary);
//[addToFavouritesDictionary release];
}
TabBar_NavigationBasedAppDelegate *mainDelegate = (TabBar_NavigationBasedAppDelegate *)[[UIApplication sharedApplication]delegate];
favouritesArray = [[NSMutableArray alloc] init];
NSMutableArray *tempArray1 = mainDelegate.delegateFavouritesArray;
favouritesArray = tempArray1;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@\"Saved.data\"];
favouritesDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];
没有找到相关结果
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