Question

（a）如何制作删除线的动画？我尝试了以下但没有工作。

-(void)strikeThrough
{
    NSNumber *strikeSize = [NSNumber numberWithInt:1];

    NSDictionary *strikeThroughAttribute = [NSDictionary dictionaryWithObject:strikeSize forKey:NSStrikethroughStyleAttributeName];

    NSAttributedString* strikeThroughText = [[NSAttributedString alloc] initWithString:_label.text attributes:strikeThroughAttribute];

    _label.attributedText = nil;
    [UIView animateWithDuration:2.0
                     animations:^{ _label.attributedText = strikeThroughText; }
                     completion:^(BOOL finished){ }];
}

（b）此外，删除线的样式与字体不匹配。例如，我使用粉笔字体，但是打击线看起来不像粉笔。怎么处理呢？

非常感谢你的帮助。

Answer 1

拥有动画的一种方法是使用CATransition

    NSNumber *strikeSize = [NSNumber numberWithInt:1];

    NSDictionary *strikeThroughAttribute = [NSDictionary dictionaryWithObject:strikeSize forKey:NSStrikethroughStyleAttributeName];

    NSAttributedString* strikeThroughText = [[NSAttributedString alloc] initWithString:self.mylabel.text attributes:strikeThroughAttribute];

    self.mylabel.attributedText = nil;
    CATransition *transition = [CATransition new];
    transition.delegate = self;
    transition.type = kCATransitionFromLeft;
    transition.duration = 2.0f;
    self.mylabel.attributedText = strikeThroughText;
    [self.mylabel.layer addAnimation:transition forKey:@"transition"];

和完成块

-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
    //Check for CATransition here
}

第二点检查here。该链接简要介绍了其他方法来处理您希望打击的样子，您无法更改它的字体。

希望这有帮助。

UIFont：如何为删除线设置动画并匹配字体样式？

1 个答案: