Constraints priorities updated for page content

Author: ealeksandrov

EAIntroView/EAIntroView.m

@@ -374,7 +374,9 @@ - (UIView *)viewForPage:(EAIntroPage *)page atXIndex:(CGFloat)xIndex {
         titleLabel.translatesAutoresizingMaskIntoConstraints = NO;
 
         [pageView addSubview:titleLabel];
-        [pageView addConstraint:[NSLayoutConstraint constraintWithItem:pageView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:titleLabel attribute:NSLayoutAttributeTop multiplier:1.0 constant:page.titlePositionY]];
+        NSLayoutConstraint *weakConstraint = [NSLayoutConstraint constraintWithItem:pageView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:titleLabel attribute:NSLayoutAttributeTop multiplier:1.0 constant:page.titlePositionY];
+        weakConstraint.priority = UILayoutPriorityDefaultHigh;
+        [pageView addConstraint:weakConstraint];
         [pageView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-10-[titleLabel]-10-|" options:NSLayoutFormatAlignAllTop metrics:nil views:@{@"titleLabel" : titleLabel}]];
     }
 
@@ -391,7 +393,9 @@ - (UIView *)viewForPage:(EAIntroPage *)page atXIndex:(CGFloat)xIndex {
         descLabel.translatesAutoresizingMaskIntoConstraints = NO;
 
         [pageView addSubview:descLabel];
-        [pageView addConstraint:[NSLayoutConstraint constraintWithItem:pageView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:descLabel attribute:NSLayoutAttributeTop multiplier:1.0 constant:page.descPositionY]];
+        NSLayoutConstraint *weakConstraint = [NSLayoutConstraint constraintWithItem:pageView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:descLabel attribute:NSLayoutAttributeTop multiplier:1.0 constant:page.descPositionY];
+        weakConstraint.priority = UILayoutPriorityDefaultHigh;
+        [pageView addConstraint:weakConstraint];
         [pageView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[descLabel]-|" options:NSLayoutFormatAlignAllTop metrics:nil views:@{@"descLabel" : descLabel}]];
     }
 
@@ -440,7 +444,7 @@ - (void)buildTitleView {
     NSDictionary *views = @{@"titleView" : self.titleView};
     NSDictionary *metrics = @{@"titleViewTopPadding" : @(self.titleViewY), @"titleViewHeight" : @(self.titleView.frame.size.height), @"titleViewWidth" : @(self.titleView.frame.size.width)};
 
-    [self.titleViewConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-titleViewTopPadding-[titleView(titleViewHeight)]" options:NSLayoutFormatAlignAllLeft metrics:metrics views:views]];
+    [self.titleViewConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-titleViewTopPadding@750-[titleView(titleViewHeight)]" options:NSLayoutFormatAlignAllLeft metrics:metrics views:views]];
     [self.titleViewConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[titleView(titleViewWidth)]" options:NSLayoutFormatAlignAllTop metrics:metrics views:views]];
     [self.titleViewConstraints addObject:[NSLayoutConstraint constraintWithItem:self.titleView attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeCenterX multiplier:1.0 constant:0.0]];
 
@@ -471,7 +475,7 @@ - (void)buildFooterView {
     NSDictionary *metrics = @{@"pageControlBottomPadding" : @(self.pageControlY - self.pageControl.frame.size.height), @"pageControlHeight" : @(self.pageControl.frame.size.height), @"skipButtonBottomPadding" : @(self.skipButtonY - self.skipButton.frame.size.height), @"skipButtonSideMargin" : @(self.skipButtonSideMargin), @"skipButtonWidth" : @(self.skipButton.frame.size.width), @"skipButtonHeight" : @(self.skipButton.frame.size.height)};
 
     [self.footerConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[pageControl]-|" options:NSLayoutFormatAlignAllCenterX metrics:metrics views:views]];
-    [self.footerConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[pageControl(pageControlHeight)]-pageControlBottomPadding-|" options:NSLayoutFormatAlignAllBottom metrics:metrics views:views]];
+    [self.footerConstraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[pageControl(pageControlHeight)]-pageControlBottomPadding@750-|" options:NSLayoutFormatAlignAllBottom metrics:metrics views:views]];
 
     if (self.skipButton && !self.skipButton.hidden) {
         if(self.skipButtonAlignment == EAViewAlignmentCenter) {