Suppose I have an object. This object has keys. I want to iterate through all of the keys to see if each of them has a given value. If I can make a dictionary object that has the same keys and values, then I can get an array of all of the object's keys by calling the dictionary's "allKeys" method.
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iOS Iterating through all of an object's keys
- Thread starter moonman239
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Yeah. What is the best way to iterate through all of an object's keys, besides creating an NSArray and manually entering the names of all of the keys?
Look at the NSEnumerator class.
For an example of it, see the NSDictionary method keyEnumerator.
Other collections, such as NSSet and NSArray, also have methods that return an NSEnumerator.
Whether an NSEnumerator object is the "best way" depends on several factors. Without more details, "best" is impossible to determine.
For an example of it, see the NSDictionary method keyEnumerator.
Other collections, such as NSSet and NSArray, also have methods that return an NSEnumerator.
Whether an NSEnumerator object is the "best way" depends on several factors. Without more details, "best" is impossible to determine.
NSFastEnumeration or NSDictionary methods could work for you as well.
check out the documentation there are a few variations on the theme that might work better for you.
Code:
- (void)enumerateKeysAndObjectsUsingBlock:(void (^)(id key, id obj, BOOL *stop))block
or
- (NSArray *)allKeysForObject:(id)anObject
or
- (NSSet *)keysOfEntriesWithOptions:(NSEnumerationOptions)opts passingTest:(BOOL (^)(id key, id obj, BOOL *stop))predicateEdit:
or as chown33 said