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I want to use static NSMutableDictionary. Can you please help how to use static NSMutableDictionary in class.
Is it right way? .h file
+(NSMutableDictionary*)contactsToAssignBill;
+(void)setContactsToAssignBill:(NSMutableDictionary*)value;
.m file
static NSMutableDictionary * contactsToAssignBill;
+(NSMutableDictionary*)contactsToAssignBill
{
if (!contactsToAssignBill)
contactsToAssignBill = [[NSMutableDictionary alloc] init];
return contactsToAssignBill;
}
+(void)setContactsToAssignBill:(NSMutableDictionary *)value
{
if(contactsToAssignBill != value)
{
[contactsToAssignBill release];
contactsToAssignBill = [value mutableCopy];
}
}
714
The NSMutableDictionary class declares the programmatic interface to objects that manage mutable associations of keys and values. It adds modification operations to the basic operations it inherits from NSDictionary . NSMutableDictionary is “toll-free bridged” with its Core Foundation counterpart, CFMutableDictionary .
Use -mutableCopy . NSDictionary *d; NSMutableDictionary *m = [d mutableCopy]; Note that -mutableCopy returns id ( Any in Swift) so you will want to assign / cast to the right type. It creates a shallow copy of the original dictionary.
In general, the collection classes (for example, NSMutableArray , NSMutableDictionary ) are not thread-safe when mutations are concerned. That is, if one or more threads are changing the same array, problems can occur.
An object representing a static collection of key-value pairs, for use instead of a Dictionary constant in cases that require reference semantics.
This is the right way to do that. Just bear in mind that the dictionary won't get deallocated at any point.
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