Objective-C语言从可变字典中删除条目
示例
-removeObjectForKey：
从字典中删除给定的键及其关联的值。
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithDictionary:@{@"key1":@"Easy",@"key2": @"Tutorials"}];
[dict removeObjectForKey:@"key1"];
NSLog(@"%@",dict);输出值
{
key2 = Tutorials;
}-removeAllObjects
清空字典的条目。
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithDictionary:@{@"key1":@"Eezy",@"key2": @"Tutorials"}];
[dict removeAllObjects];
NSLog(@"%@",dict);输出值
{
}-removeObjectsForKeys：
从字典中删除由给定数组中的元素指定的条目。
NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithDictionary:@{@"key1":@"Easy",@"key2": @"Tutorials"}];
[dict removeObjectsForKeys:@[@"key1"]];
NSLog(@"%@",dict);输出值
{
key2 = Tutorials;
}