我目前正在设置具有以下结构的UIScrollView
UIScrollView
--ContentView (UIView)
--ContainerView1 (UIView)
--UILabel1
--UILabel2
--ContainerView2 (UIView)
--UILabel3
--UILabel4
--ContainerView3 (UIView)
--UILabel5
--UILabel6
我已经为上面的所有元素固定了所有四个边缘,并且还定义了它们的高度限制(如果我不这样做,则会出现零高度的故事板投诉)。
现在,只要我的UILabel从服务器收到文本,我就会为所有标签调用sizeToFit。然后我使用containerViews的lastObject来计算假设的新高度。然后我调用setNeedsLayout。但是,我的应用程序没有任何变化!
这是我用来计算新高度和调整的代码。也许我编程错了?对不起,我对约束的概念不强,可能也设置了错误的约束方式?
- (void) relayoutAllSubViews: (NSArray *) arrayOfContainerViews
{
//Relayout subviews
for (int i = 0; i < [arrayOfContainerViews count]; i++)
{
UIView * indView = [arrayOfContainerViews objectAtIndex:i];
if (indView.hidden == YES)
{
indView.frame = CGRectMake(indView.frame.origin.x, indView.frame.origin.y, indView.frame.size.width, 0);
}
else
{
UIView * lastSubviewInView = [indView.subviews lastObject];
CGFloat subviewEndPos = lastSubviewInView.frame.origin.y + lastSubviewInView.frame.size.height;
if ((subviewEndPos - (indView.frame.origin.y + indView.frame.size.height)) > 0)
{
indView.frame = CGRectMake(indView.frame.origin.x, indView.frame.origin.y, indView.frame.size.width, (subviewEndPos - indView.frame.origin.y));
}
}
}
//Adjust scrollview
UIView * lastView = [self.scrollView.subviews lastObject];
CGFloat newEndPos = lastView.frame.origin.y + lastView.frame.size.height;
self.contentView.bounds = CGRectMake(self.contentView.bounds.origin.x, self.contentView.bounds.origin.y, self.contentView.bounds.size.width, (newEndPos - self.contentView.bounds.origin.y));
self.scrollView.contentSize = self.contentView.bounds.size;
[self.view setNeedsLayout];
}
需要帮助!!
答案 0 :(得分:2)
//使用以下代码设置滚动视图的内容大小。
float newHeight=0.0f;
for(UIView *subViews in [scrollViewObj subviews])
{
if([subViews isKindOfClass:[UIView class]])
{
newHeight=newHeight+(subViews.frame.origin.x+subViews.frame.size.height);
}
}
NSLog(@"%f",newHeight);
[scrollView setContentSize:CGSizeMake(300, newHeight)];//change the width as you need
答案 1 :(得分:0)
//我添加了动态添加子视图高度的代码
float newHeight=0.0f;
for(UIView *subViews in [scrollViewObj subviews])
{
if([subViews isKindOfClass:[UIView class]])
{
if([[subViews subviews] count]>0)
{
float heightOfSubviews=0.0f;
for(UIView *insideSubViews in [subViews subviews])
{
heightOfSubviews=heightOfSubviews+(insideSubViews.frame.origin.y+insideSubViews.frame.size.height);
}
NSLog(@"%f",heightOfSubviews);
[subViews setFrame:CGRectMake(subViews.frame.origin.x, subViews.frame.origin.y, subViews.frame.size.width, heightOfSubviews)];
}
}
}
UIView *viewLastObj=scrollViewObj.subviews.lastObject;
newHeight=viewLastObj.frame.origin.y+viewLastObj.frame.size.height;
NSLog(@"%f",newHeight);
[scrollViewObj setContentSize:CGSizeMake(300, newHeight)];