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Support centered bottomTab icons using bottomTabs.titleDisplayMode op…
…tion (#5667) * Support centered bottomTab icons using bottomTabs.titleDisplayMode option * Improve readability, better namings * Rename setTabItemImagesCentered to centerTabItems
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Original file line number | Diff line number | Diff line change |
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#import <UIKit/UIKit.h> | ||
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@interface UITabBar (utils) | ||
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- (void)centerTabItems; | ||
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@end |
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Original file line number | Diff line number | Diff line change |
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#import "UITabBar+utils.h" | ||
#import <objc/runtime.h> | ||
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#define BADGE_OFFSET 0.2 | ||
#define IMAGE_VIEW_TAG 1 | ||
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typedef void (*UITabBarButton_layoutSubviews__IMP)(void); | ||
static UITabBarButton_layoutSubviews__IMP original_UITabBarButton_layoutSubviews; | ||
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@implementation UITabBar (utils) | ||
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- (void)centerTabItems { | ||
[self removeTabBarItemTitles]; | ||
[self swizzleUITabBarButton]; | ||
} | ||
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- (void)removeTabBarItemTitles { | ||
for (UITabBarItem* item in self.items) { | ||
item.title = nil; | ||
} | ||
} | ||
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- (void)swizzleUITabBarButton { | ||
static dispatch_once_t onceToken; | ||
dispatch_once(&onceToken, ^{ | ||
[[self class] swizzleUITabBarButtonLayoutSubviews]; | ||
}); | ||
} | ||
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+ (void)swizzleUITabBarButtonLayoutSubviews { | ||
Class UITabBarButtonClass = NSClassFromString(@"UITabBarButton"); | ||
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SEL layoutSubviewsSEL = @selector(layoutSubviews); | ||
Method layoutSubviewsMethod = class_getInstanceMethod(UITabBarButtonClass, layoutSubviewsSEL); | ||
IMP layoutSubviewsIMP = method_getImplementation(layoutSubviewsMethod); | ||
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original_UITabBarButton_layoutSubviews = layoutSubviewsIMP; | ||
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SEL swizzleUITabBarButton_layoutSubviewsSEL = @selector(swizzleUITabBarButton_layoutSubviews); | ||
Method swizzleUITabBarButton_layoutSubviewsMethod = class_getInstanceMethod(self, swizzleUITabBarButton_layoutSubviewsSEL); | ||
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method_exchangeImplementations(layoutSubviewsMethod, swizzleUITabBarButton_layoutSubviewsMethod); | ||
} | ||
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- (void)swizzleUITabBarButton_layoutSubviews { | ||
original_UITabBarButton_layoutSubviews(); | ||
for (UIView *subView in self.subviews) { | ||
if ([subView isKindOfClass:NSClassFromString(@"UITabBarSwappableImageView")]) { | ||
subView.center = CGPointMake(subView.center.x, subView.superview.frame.size.height / 2); | ||
subView.tag = IMAGE_VIEW_TAG; | ||
} | ||
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if ([subView isKindOfClass:NSClassFromString(@"_UIBadgeView")]) { | ||
UIView* imageView = [subView.superview viewWithTag:IMAGE_VIEW_TAG]; | ||
subView.frame = CGRectMake(subView.frame.origin.x, (imageView.frame.origin.y + imageView.frame.size.height * BADGE_OFFSET) - subView.frame.size.height / 2, subView.frame.size.width, subView.frame.size.height); | ||
} | ||
} | ||
} | ||
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@end |
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Original file line number | Diff line number | Diff line change |
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@@ -18,4 +18,6 @@ | |
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- (void)setTabBarVisible:(BOOL)visible animated:(BOOL)animated; | ||
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- (void)centerTabItems; | ||
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@end |
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Crashed on iPhone5 (ios 10):
UITabBar+utils.m - Line 47
-[UITabBar(utils) swizzleUITabBarButton_layoutSubviews] + 47