1.效果图
工具条滚动隐藏与出现.gif
2.关键代码
#pragma mark - 关键代码：动画设置
- (void)setIsExpand:(BOOL)isExpand{
[UIView animateWithDuration:0.25 delay:0.0 usingSpringWithDamping:0.4 initialSpringVelocity:10.0 options:UIViewAnimationOptionTransitionCurlUp animations:^{
self.bottomCon.constant = isExpand?44.0f:0.0f;
[self.view layoutIfNeeded];
} completion:^(BOOL finished) {
_isExpand = isExpand;
}];
[self.navigationController setNavigationBarHidden:!isExpand animated:YES];
#pragma clang diagnostic push
#pragma clang diagnostic ignored"-Wdeprecated-declarations"
[[UIApplication sharedApplication] setStatusBarHidden:!isExpand withAnimation:NO];
#pragma clang diagnostic pop
}
#pragma mark - 关键代码：滚动方向判断
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
self.lastContentOffset = scrollView.contentOffset.y;
}
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
if (self.lastContentOffset < scrollView.contentOffset.y) {
NSLog(@"向上滚动");
if (self.isExpand) {
self.isExpand = NO;
}
}else{
NSLog(@"向下滚动");
if (!self.isExpand) {
self.isExpand = YES;
}
}
}
