OC基础使用(九 NsMutableDictionary 可变字典)

NsMutableDictionary 可变字典
1.创建
NSMutableDictionary *dic = [[NSMutableDictionary alloc] initWithCapacity:0];


2.添加与修改元素
[dic setObject:@"apple" forKey:@"fruit1"];


3.根据key移除元素
[dic removeObjectForKey:@"fruit2"];


4.移除所有
[dic removeAllObjects];