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Text node to gracefully fail upon font failure

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This commit is contained in:
Shannon Ma
2015-07-31 12:24:04 -07:00
parent 15133fdbf7
commit d5de2a22fd
1 changed files with 9 additions and 2 deletions
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11
AsyncDisplayKit/Details/ASTextNodeCoreTextAdditions.m
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@@ -11,6 +11,8 @@
#import <CoreText/CTFont.h>
#import <CoreText/CTStringAttributes.h>
#import "ASAssert.h"
#pragma mark - Public
BOOL ASAttributeWithNameIsUnsupportedCoreTextAttribute(NSString *attributeName)
{
@@ -65,8 +67,13 @@ NSDictionary *NSAttributedStringAttributesForCoreTextAttributes(NSDictionary *co
CTFontRef coreTextFont = (__bridge CTFontRef)coreTextValue;
NSString *fontName = (__bridge_transfer NSString *)CTFontCopyPostScriptName(coreTextFont);
CGFloat fontSize = CTFontGetSize(coreTextFont);
cleanAttributes[NSFontAttributeName] = [UIFont fontWithName:fontName size:fontSize];
UIFont *font = [UIFont fontWithName:fontName size:fontSize];
ASDisplayNodeCAssertNotNil(font, @"unable to load font %@ with size %f", fontName, fontSize);
if (font == nil) {
// Gracefully fail if we were unable to load the font.
font = [UIFont systemFontOfSize:fontSize];
}
cleanAttributes[NSFontAttributeName] = font;
}
// kCTKernAttributeName -> NSKernAttributeName
else if ([coreTextKey isEqualToString:(NSString *)kCTKernAttributeName]) {