如何以编程方式显示 UIMenu？

Question

我已将两个 UILongPressGestureRecognizer 对象分配给 UIButton。

第一个，名为longPressGestureRecognizer并且minimumPressDuration = 0.5

第二个，被命名为longPressGestureRecognizer并且具有minimumPressDuration = 1.5

self.longPressGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];

        self.longPressGestureRecognizer.delegate = self;
        
        self.longPressGestureRecognizer.minimumPressDuration = 0.5;
        
        self.longPressGestureRecognizer.numberOfTouchesRequired = 1;
        
        self.longPressGestureRecognizer.numberOfTapsRequired = 0;
        
        self.longPressGestureRecognizer.allowableMovement = 10.0;
        
        [self.customButton addGestureRecognizer:self.longPressGestureRecognizer];
     
        self.prolongedPressGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(prolongedPress:)];
        
        self.prolongedPressGestureRecognizer.delegate = self;
        
        self.prolongedPressGestureRecognizer.minimumPressDuration = 1.5;
        
        self.prolongedPressGestureRecognizer.numberOfTouchesRequired = 1;
        
        self.prolongedPressGestureRecognizer.numberOfTapsRequired = 0;
        
        self.prolongedPressGestureRecognizer.allowableMovement = 10.0;
        
        [self.customButton addGestureRecognizer:self.prolongedPressGestureRecognizer];

场景：

当第一个开火时，我希望发生一些事情。

当第二个触发时，我希望显示上下文菜单。

目前，我没有办法做到这一点。

解决方案：

1. 是否可以延迟上下文菜单出现的时间？ 我确定内部有一个长按手势识别器可以显示菜单。 我可以修改这个手势识别器吗？

2. 是否可以以编程方式显示菜单？

        NSMutableArray* actions = [[NSMutableArray alloc] init];

        [actions addObject:[UIAction actionWithTitle:@"Edit"
                                               image:nil
                                          identifier:nil
                                             handler:^(__kindof UIAction* _Nonnull action) {
            
            // ...
        }]];

        UIMenu* menu =
        [UIMenu menuWithTitle:@""
                     children:actions];
        
        self.customButton.menu = menu;

Answer 1

你可能需要这样的东西。 self.layoutButton 将菜单显示为主要操作。 这意味着正常的水龙头。 不是主要动作是长按。

NSMutableArray<UIAction *> *actions = [NSMutableArray array];
__weak __typeof__(self) blockSelf = self;
for (NSString *type in sortedKeys) {
        ZoneLayout *layout = [LayoutManager layoutByType:type];
        UIAction *action = [UIAction actionWithTitle:layout.title image:nil identifier:type
                                             handler:^(__kindof UIAction * _Nonnull action) {
                __strong __typeof__(blockSelf) strongSelf = blockSelf;
                if (strongSelf) {
                        strongSelf.layoutType = type;
                        [strongSelf setupZoneLayoutMenu];
                }
        }];
        if ([self.layoutType isEqualToString:type])
                action.state = UIMenuElementStateOn;
        else
                action.state = UIMenuElementStateOff;
        [actions addObject:action];
}
ZoneLayout *layout = [LayoutManager layoutByType:self.layoutType];
if (layout != nil)
        [self.layoutButton setTitle:layout.title forState:UIControlStateNormal];
else
        [self.layoutButton setTitle:@"-" forState:UIControlStateNormal];
self.layoutButton.menu = [UIMenu menuWithChildren:actions];
self.layoutButton.showsMenuAsPrimaryAction = YES;