Fixes iOS 13 reverting back to Times New Roman when changing the font size of default system fonts

Author: Mathbl

FSCalendar/FSCalendarAppearance.m

@@ -29,52 +29,52 @@ - (instancetype)init
 {
     self = [super init];
     if (self) {
-        
+
         _titleFont = [UIFont systemFontOfSize:FSCalendarStandardTitleTextSize];
         _subtitleFont = [UIFont systemFontOfSize:FSCalendarStandardSubtitleTextSize];
         _weekdayFont = [UIFont systemFontOfSize:FSCalendarStandardWeekdayTextSize];
         _headerTitleFont = [UIFont systemFontOfSize:FSCalendarStandardHeaderTextSize];
-        
+
         _headerTitleColor = FSCalendarStandardTitleTextColor;
         _headerDateFormat = @"MMMM yyyy";
         _headerMinimumDissolvedAlpha = 0.2;
         _weekdayTextColor = FSCalendarStandardTitleTextColor;
         _caseOptions = FSCalendarCaseOptionsHeaderUsesDefaultCase|FSCalendarCaseOptionsWeekdayUsesDefaultCase;
-        
+
         _backgroundColors = [NSMutableDictionary dictionaryWithCapacity:5];
         _backgroundColors[@(FSCalendarCellStateNormal)]      = [UIColor clearColor];
         _backgroundColors[@(FSCalendarCellStateSelected)]    = FSCalendarStandardSelectionColor;
         _backgroundColors[@(FSCalendarCellStateDisabled)]    = [UIColor clearColor];
         _backgroundColors[@(FSCalendarCellStatePlaceholder)] = [UIColor clearColor];
         _backgroundColors[@(FSCalendarCellStateToday)]       = FSCalendarStandardTodayColor;
-        
+
         _titleColors = [NSMutableDictionary dictionaryWithCapacity:5];
         _titleColors[@(FSCalendarCellStateNormal)]      = [UIColor blackColor];
         _titleColors[@(FSCalendarCellStateSelected)]    = [UIColor whiteColor];
         _titleColors[@(FSCalendarCellStateDisabled)]    = [UIColor grayColor];
         _titleColors[@(FSCalendarCellStatePlaceholder)] = [UIColor lightGrayColor];
         _titleColors[@(FSCalendarCellStateToday)]       = [UIColor whiteColor];
-        
+
         _subtitleColors = [NSMutableDictionary dictionaryWithCapacity:5];
         _subtitleColors[@(FSCalendarCellStateNormal)]      = [UIColor darkGrayColor];
         _subtitleColors[@(FSCalendarCellStateSelected)]    = [UIColor whiteColor];
         _subtitleColors[@(FSCalendarCellStateDisabled)]    = [UIColor lightGrayColor];
         _subtitleColors[@(FSCalendarCellStatePlaceholder)] = [UIColor lightGrayColor];
         _subtitleColors[@(FSCalendarCellStateToday)]       = [UIColor whiteColor];
-        
+
         _borderColors[@(FSCalendarCellStateSelected)] = [UIColor clearColor];
         _borderColors[@(FSCalendarCellStateNormal)] = [UIColor clearColor];
-        
+
         _borderRadius = 1.0;
         _eventDefaultColor = FSCalendarStandardEventDotColor;
         _eventSelectionColor = FSCalendarStandardEventDotColor;
-        
+
         _borderColors = [NSMutableDictionary dictionaryWithCapacity:2];
-        
+
 #if TARGET_INTERFACE_BUILDER
         _fakeEventDots = YES;
 #endif
-        
+
     }
     return self;
 }
@@ -492,22 +492,22 @@ - (FSCalendarCellShape)cellShape
 
 - (void)setTitleTextSize:(CGFloat)titleTextSize
 {
-    self.titleFont = [UIFont fontWithName:self.titleFont.fontName size:titleTextSize];
+    self.titleFont = [self.titleFont fontWithSize:titleTextSize];
 }
 
 - (void)setSubtitleTextSize:(CGFloat)subtitleTextSize
 {
-    self.subtitleFont = [UIFont fontWithName:self.subtitleFont.fontName size:subtitleTextSize];
+    self.subtitleFont = [self.subtitleFont fontWithSize:subtitleTextSize];
 }
 
 - (void)setWeekdayTextSize:(CGFloat)weekdayTextSize
 {
-    self.weekdayFont = [UIFont fontWithName:self.weekdayFont.fontName size:weekdayTextSize];
+    self.weekdayFont = [self.weekdayFont fontWithSize:weekdayTextSize];
 }
 
 - (void)setHeaderTitleTextSize:(CGFloat)headerTitleTextSize
 {
-    self.headerTitleFont = [UIFont fontWithName:self.headerTitleFont.fontName size:headerTitleTextSize];
+    self.headerTitleFont = [self.headerTitleFont fontWithSize:headerTitleTextSize];
 }
 
 - (void)invalidateAppearance