比如要实现一个view的出现和隐藏，我用过以下三种方式分别实现过，记录如下：
//1.通过改变frame的y坐标来做动画实现（其中flag是为了控制动画执行完毕后才执行下一次动画）
if (!self.flag && self.commentBar.frame.origin.y == self.view.frame.size.height - 50) {
[UIView animateWithDuration:0.2 animations:^{
self.flag = YES;
CGRect frame = self.commentBar.frame;
frame.origin.y += 50;
self.commentBar.frame = frame;
} completion:^(BOOL finished) {
self.flag = NO;
}];
}
-(void)showInView:(UIView *)View{
YQShareButton *btn =[self viewWithTag:105];
if (_favoritesId == 0)
{
[btn setImage:[UIImage imageNamed:@"ic_collect_empty"] forState:UIControlStateNormal];
[btn setTitle:@"收藏" forState:UIControlStateNormal];
}
else
{
[btn setImage:[UIImage imageNamed:@"ic_dia_collect(1)"] forState:UIControlStateNormal];
[btn setTitle:@"取消收藏" forState:UIControlStateNormal];
}
[View addSubview:self];
[self mas_makeConstraints:^(MASConstraintMaker *make) {
make.edges.mas_equalTo(UIEdgeInsetsZero);
}];
//动画之前一定要先调用这个额
[View layoutIfNeeded];
[self.shareViewBottomHideConst uninstall];
[self.shareViewBottomShowConst install];
[UIView animateWithDuration:0.2 animations:^{
[View layoutIfNeeded];
}];
}
[self.shareViewBottomShowConst uninstall];
[self.shareViewBottomHideConst install];
[UIView animateWithDuration:0.2 animations:^{
[self layoutIfNeeded];
} completion:^(BOOL finished) {
[self removeFromSuperview];
}];
