UIMenuItem 模仿扣扣，微信聊天记录中长按转发，复制，粘贴等功能_ios开发仿微信聊天选择复制文本-优快云博客

本文链接：https://blog.youkuaiyun.com/wyy520pro/article/details/51965324

本文介绍了如何在iOS应用中通过UIMenuItem实现类似QQ和微信聊天记录中的长按操作，包括复制、剪切、转发、收藏和删除功能。通过添加长按手势识别器，响应长按事件，并设置菜单项，最终实现在视图上长按时弹出相应的操作选项。

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简单的介绍一个小控件基本用法，具体功能就不写了，根据个人喜好添加功能

（1）.在-viewDidLoad()中添加长按手势

UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressGestureAction:)];
longPressGesture.minimumPressDuration = 2;
[self.view addGestureRecognizer:longPressGesture];

(2).长按手势相应事件

//长按手势
-(void)longPressGestureAction:(UILongPressGestureRecognizer *)longPressGesture
{

    if (longPressGesture.state == UIGestureRecognizerStateBegan) {
        [self.view becomeFirstResponder];
        UIMenuItem *item1 = [[UIMenuItem alloc]initWithTitle:@"复制" action:@selector(copyAction)];
        UIMenuItem *item2 = [[UIMenuItem alloc]initWithTitle:@"剪切" action:@selector(cutAction)];
        UIMenuItem *item3 = [[UIMenuItem alloc]initWithTitle:@"转发" action:@selector(transmitAction)];
        UIMenuItem *item4 = [[UIMenuItem alloc]initWithTitle:@"收藏" action:@selector(collectAction)];
        UIMenuItem *item5 = [[UIMenuItem alloc]initWithTitle:@"删除" action:@selector(deleteAction)];
        UIMenuController *menu =[UIMenuController sharedMenuController];
        [menu setMenuItems:[NSArray arrayWithObjects:item1,item2,item3,item4,item5,nil]];
        [menu setTargetRect:self.view.bounds inView:self.view];
        [menu setMenuVisible:YES animated:YES];
        [menu setArrowDirection:UIMenuControllerArrowDown];
        ;

    }
}

(3). 必须响应事件的两个条件

//必须带的条件一
-(BOOL)canBecomeFirstResponder{
    return YES;
}
//条件二
-(BOOL)canPerformAction:(SEL)action withSender:(id)sender{
    if (action == @selector(copyAction)||action == @selector(cutAction)||action == @selector(transmitAction)||action == @selector(collectAction)||action == @selector(deleteAction)) {
        return YES;
    }else{
        return NO;   //默认系统菜单项
    }
}

（4）.添加菜单栏中各个功能

-(void)copyAction{
    NSLog(@"复制");
}
-(void)cutAction{
    NSLog(@"剪切");
}
-(void)transmitAction{
    NSLog(@"转发");
}
-(void)collectAction{
    NSLog(@"收藏");
}
-(void)deleteAction{
    NSLog(@"删除");
}