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Bottom nav color ios fix (#8384)

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* fix(bottom-navigation): color in ios fix

* chore: improving fix and added description

* chore: typo fix

* chore: updated comment

* chore: condition check updated
This commit is contained in:
Vasil Trifonov
2020-02-27 10:40:00 +02:00
committed by GitHub
parent 2d4e258a88
commit 062c620acb
1 changed files with 13 additions and 4 deletions
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17
nativescript-core/ui/bottom-navigation/bottom-navigation.ios.ts
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@ -377,7 +377,7 @@ export class BottomNavigation extends TabNavigationBase {
public setTabBarItemColor(tabStripItem: TabStripItem, value: UIColor | Color): void {
const states = getTitleAttributesForStates(tabStripItem.label);
applyStatesToItem(tabStripItem.nativeView, states);
applyStatesToItem(tabStripItem.nativeView, states, this.viewController.tabBar);
}
public setTabBarIconColor(tabStripItem: TabStripItem, value: UIColor | Color): void {
@ -389,7 +389,7 @@ export class BottomNavigation extends TabNavigationBase {
public setTabBarItemFontInternal(tabStripItem: TabStripItem, value: Font): void {
const states = getTitleAttributesForStates(tabStripItem.label);
applyStatesToItem(tabStripItem.nativeView, states);
applyStatesToItem(tabStripItem.nativeView, states, this.viewController.tabBar);
}
public setTabBarItemTextTransform(tabStripItem: TabStripItem, value: TextTransform): void {
@ -519,7 +519,7 @@ export class BottomNavigation extends TabNavigationBase {
updateTitleAndIconPositions(tabStripItem, tabBarItem, controller);
const states = getTitleAttributesForStates(tabStripItem.label);
applyStatesToItem(tabBarItem, states);
applyStatesToItem(tabBarItem, states, this.viewController.tabBar);
controller.tabBarItem = tabBarItem;
tabStripItem._index = i;
@ -719,11 +719,20 @@ function getTitleAttributesForStates(view: View): TabStates {
return result;
}
function applyStatesToItem(item: UITabBarItem, states: TabStates) {
function applyStatesToItem(item: UITabBarItem, states: TabStates, tabBar: UITabBar) {
if (!states) {
return;
}
item.setTitleTextAttributesForState(states.normalState, UIControlState.Normal);
item.setTitleTextAttributesForState(states.selectedState, UIControlState.Selected);
// there's a bug when setting the item color on ios 13 if there's no background set to the tabstrip
// https://books.google.bg/books?id=99_BDwAAQBAJ&q=tabBar.unselectedItemTintColor
// to fix the above issue we are applying the selected fix only for the case, when there is no background set
// in that case we have the following known issue:
// we will set the color to all unselected items, so you won't be able to set different colors for the different not selected items
if (!tabBar.barTintColor && states.normalState[UITextAttributeTextColor] && (majorVersion > 9)) {
tabBar.unselectedItemTintColor = states.normalState[UITextAttributeTextColor];
}
}