要实现长按弹出菜单栏需要做到以下三点：
1、在view（cell）或者viewController中调用-becomeFirstResponder方法；
2、你的view获得或者view controller需要实现 -canBecomeFirstResponder 方法,返回YES;
3、你的view获得或者view controller需要实现-canPerformAction:action withSender:sender 方法来隐藏或者现实响应的item；
cell中关键代码展示：
1.添加longpress事件
-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
if (self=[super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
[self addGestureRecognizer: [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longTap:)]];
}
return self;
}
2.处理长按事件
#pragma mark - target
- (void)longTap:(UILongPressGestureRecognizer *)gestureRecognizer
{
if ([gestureRecognizer state]==UIGestureRecognizerStateBegan)
{
[self becomeFirstResponder];
//得到菜单栏
UIMenuController *menuController = [UIMenuController sharedMenuController];
UIMenuItem *copyItem = [[UIMenuItem alloc] initWithTitle:@"复制" action:@selector(copyItemClicked:)];
UIMenuItem *colloctionItem = [[UIMenuItem alloc] initWithTitle:@"收藏" action:@selector(collectionItemClicked:)];
[menuController setMenuItems:[NSArray arrayWithObjects:copyItem,colloctionItem, nil]];
//设置菜单栏位置
[menuController setTargetRect:self.contentLabel.frame inView:self.contentLabel.superview];
//显示菜单栏
[menuController setMenuVisible:YES animated:YES];
}
}
3.实现默认方法
#pragma mark 处理action事件
-(BOOL)canPerformAction:(SEL)action withSender:(id)sender{
if(action ==@selector(copyItemClicked:)){
return YES;
}else if (action==@selector(collectionItemClicked:)){
return YES;
}
return [super canPerformAction:action withSender:sender];;
}
#pragma mark 实现成为第一响应者方法
- (BOOL)canBecomeFirstResponder
{
return YES;
}
4.处理item点击事件
#pragma mark method
- (void)copyItemClicked:(id)sender
{
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
[pasteboard setString:self.contentLabel.text];
}
-(void)collectionItemClicked:(id)sender{
}
在外层controller
#pragma mark scrollView delegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
if ([UIMenuController sharedMenuController].isMenuVisible) {//如果显示就隐藏
[[UIMenuController sharedMenuController] setMenuVisible:NO animated:YES];
}
}
