objective-c - force NSDictionary to release memory

Question

Somewhere in an ARC project, I have:

//Class1.h
@interface Class1 {
    NSDictionary * dict;
}

@end

//Class1.m
@implementation Class1

-(void)loadDict {
    NSDictionary * dict = [[NSDictionary alloc] init];
    // Now load couple of (NSString *, NSString *) pairs into the dictionary
    ...
}

-(void)releaseAllMemoryUsedByDict {
    //TODO
}

@end

How do I release all the memory occupied by dict, on demand? I guess if I had an NSMutableDictionary, I could call its removeAllObjects method. How would I do it for NSDictionary? Would setting dict = NULL work?

Answer 1

假设nil没有其他对象持有（强烈引用）NSDictionary.

Answer 2

如果您设置NSDictionarytonil或任何对象，它将被释放，假设没有其他对象持有对它的引用（这在 ARC 环境中）。