iOS开发-UILabel实现长按复制等功能

最近有个需求是要仿照微信朋友圈中长按文字弹出复制的功能,总结如下

参考文章:https://blog.csdn.net/u011347072/article/details/49506977

第一种方法

@interface CopyLable0 : UILabel

@end


@interface CopyLable0 ()

@property (nonatomic, strong) UIPasteboard *pasteboard;

@end

@implementation CopyLable0

- (instancetype)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        self.numberOfLines = 0;
        self.pasteboard = [UIPasteboard generalPasteboard];
        [self attachLongTapHandle];
    }
    return self;
}


- (void)attachLongTapHandle {
    self.userInteractionEnabled = YES;
    UILongPressGestureRecognizer *longPress = [UILongPressGestureRecognizer bk_recognizerWithHandler:^(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location) {
        // 防止长按之后连续触发该事件
        if (sender.state == UIGestureRecognizerStateBegan) {
            // UILabel成为第一响应者
            [self becomeFirstResponder]; 
            UIMenuController *menuVC = [UIMenuController sharedMenuController];
            [menuVC setTargetRect:self.frame inView:self.superview];
            [menuVC setMenuVisible:YES animated:YES];
        }
    }];
    [self addGestureRecognizer:longPress];
}

- (BOOL)canBecomeFirstResponder {
    return YES;
}

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    if (action == @selector(copy:)) {
        return YES;
    }
    if (action == @selector(paste:)) {
        return YES;
    }
    if (action == @selector(delete:)) {
        return YES;
    }
    if (action == @selector(selectAll:)) {
        return YES;
    }
    if (action == @selector(cut:)) {
        return YES;
    }
    return NO;
}

- (void)copy:(id)sender {
     NSLog(@"copy");
     self.pasteboard.string = self.text;
}

- (void)paste:(id)sender {
     NSLog(@"paste");
}

- (void)delete:(id)sender {
   NSLog(@"delete");
}

- (void)selectAll:(id)sender {
    NSLog(@"selectAll");
}

- (void)cut:(id)sender {
    NSLog(@"cut");
}
@end

第二种方法

@interface CopyLabel1 : UILabel

@end

@interface CopyLabel1 ()

@property (nonatomic, strong) UIPasteboard *pasteBoard;

@end

@implementation CopyLabel1

- (instancetype)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        self.numberOfLines = 0;
        [self attachLongPress];
        self.pasteBoard = [UIPasteboard generalPasteboard];
    }
    return self;
}

- (void)attachLongPress{
    self.userInteractionEnabled = YES;
    
    UILongPressGestureRecognizer *longPress = [UILongPressGestureRecognizer bk_recognizerWithHandler:^(UIGestureRecognizer *sender, UIGestureRecognizerState state, CGPoint location) {
         // 防止长按之后连续触发该事件
        if (sender.state == UIGestureRecognizerStateBegan) {
            [self becomeFirstResponder];
            UIMenuItem *copyMenuItem = [[UIMenuItem alloc]initWithTitle:@"复制" action:@selector(copyAction:)];
            UIMenuItem *pasteMenueItem = [[UIMenuItem alloc]initWithTitle:@"粘贴" action:@selector(pasteAction:)];
            UIMenuItem *cutMenuItem = [[UIMenuItem alloc]initWithTitle:@"剪切" action:@selector(cutAction:)];
            UIMenuController *menuController = [UIMenuController sharedMenuController];
            [menuController setMenuItems:[NSArray arrayWithObjects:copyMenuItem, pasteMenueItem,cutMenuItem, nil]];
            [menuController setTargetRect:self.frame inView:self.superview];
            [menuController setMenuVisible:YES animated:YES];
        }

    }];
    [self addGestureRecognizer:longPress];
}

- (BOOL)canBecomeFirstResponder {
    return YES;
}

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    if (action == @selector(copyAction:)) {
        return YES;
    }
    if (action == @selector(pasteAction:)) {
        return YES;
    }
    if (action == @selector(cutAction:)) {
        return YES;
    }
    return NO; //隐藏系统默认的菜单项
}

- (void)copyAction:(id)sender {
    self.pasteBoard.string = self.text;
    NSLog(@"粘贴的内容为%@", self.pasteBoard.string);
}

- (void)pasteAction:(id)sender {
    self.text = self.pasteBoard.string;
}

- (void)cutAction:(id)sender  {
    self.pasteBoard.string = self.text;
    self.text = nil;
}