ios - iOS: How to save NSOrderedSet with app related user data?

Question

I need to save NSOrderedSet as a container for an inner NSDictionary objects. I tried to save the set to plist, but this class can't be saved here. Are there any other way to save it easily and don't go to Core Data jungle?

Answer 1

您可以使用NSCoding. 我觉得很方便。

节省：

NSArray *array = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *path = [array[0] stringByAppendingPathComponent:@"my_set"];

NSOrderedSet *my_set = [NSOrderedSet orderedSetWithObjects:@"a", @"b", @"c", nil];
[NSKeyedArchiver archiveRootObject:my_set toFile:path];

取回：

my_set = [NSKeyedUnarchiver unarchiveObjectWithFile:path];

Answer 2

将有序集保存为数组：

NSOrderedSet *set = ... // your ordered set
NSArray *array = [set array];
// Now write the array to the plist

之后，

// read the array from the plist
NSArray *array = ... // array from plist
NSOrderedSet *set = [NSOrderedSet orderedSetWithArray:array];

Answer 3

使用 NSOrderedSet- (NSArray *)array 方法获取数组对象并使用 NSArray 的- (BOOL)writeToFile:(NSString *)path atomically:(BOOL)flag, 写入 plist 文件