- (instancetype)initWithFrame:(CGRect)frame {
 if (self = [super initWithFrame:frame]) {
  [self pressAction];
 }
 return self;
}
// 初始化設(shè)置
- (void)pressAction {
 self.userInteractionEnabled = YES;
 UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressAction:)];
 longPress.minimumPressDuration = 1;
 [self addGestureRecognizer:longPress];
}

1、UIResponder：通過這個類實現(xiàn)UILabel可以響應(yīng)事件(我們知道UIlabel是不能成為響應(yīng)者的，所以這里需要重寫)，控制需要響應(yīng)的事件

 // 使label能夠成為響應(yīng)事件
 - (BOOL)canBecomeFirstResponder {
  return YES;
 }
 // 控制響應(yīng)的方法
 - (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
  return action == @selector(customCopy:);
 }

2、UIPasteboard：該類支持寫入和讀取數(shù)據(jù)，類似剪貼板

 - (void)customCopy:(id)sender {
 UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
 pasteboard.string = self.text;
 }

3、UIMenuController：可以通過這個類實現(xiàn)在點擊內(nèi)容，或者長按內(nèi)容時展示出復(fù)制、剪貼、粘貼等選擇的項，每個選項都是一個UIMenuItem對象

- (void)longPressAction:(UIGestureRecognizer *)recognizer {
 [self becomeFirstResponder];
 UIMenuItem *copyItem = [[UIMenuItem alloc] initWithTitle:@"拷貝" action:@selector(customCopy:)];
 [[UIMenuController sharedMenuController] setMenuItems:[NSArray arrayWithObjects:copyItem, nil]];
 [[UIMenuController sharedMenuController] setTargetRect:self.frame inView:self.superview];
 [[UIMenuController sharedMenuController] setMenuVisible:YES animated:YES];
}

補充：

一、UIResponderStandardEditActions：這是蘋果給NSObject寫的一個分類，其中包含了我們常用的復(fù)制，粘貼，全選等方法

 - (void)cut:(nullable id)sender  NS_AVAILABLE_IOS(3_0);
 - (void)copy:(nullable id)sender  NS_AVAILABLE_IOS(3_0);
 - (void)paste:(nullable id)sender  NS_AVAILABLE_IOS(3_0);
 - (void)select:(nullable id)sender  NS_AVAILABLE_IOS(3_0);
 - (void)selectAll:(nullable id)sender  NS_AVAILABLE_IOS(3_0);
 - (void)delete:(nullable id)sender   NS_AVAILABLE_IOS(3_2);

當(dāng)我們，選中彈出的item時，系統(tǒng)會調(diào)用上面對應(yīng)的方法