@ Bilobatum'un cevabını genişletmek ve bu kategoriyi başka bir sorudan kullanmak. Bunu ben pişirdim:
Kullanım:
UILabel *labelWithImage = [UILabel new];
labelWithImage.text = @"Tap [new-button] to make a new thing!";
NSAttributedString *stringWithImage = [labelWithImage.attributedText attributedStringByReplacingOccurancesOfString:@"[new-button]" withImage:[UIImage imageNamed:@"MyNewThingButtonImage"] scale:0];
labelWithImage.attributedText = stringWithImage;
Uygulama:
@interface NSMutableAttributedString (InlineImage)
- (void)replaceCharactersInRange:(NSRange)range withInlineImage:(UIImage *)inlineImage scale:(CGFloat)inlineImageScale;
@end
@interface NSAttributedString (InlineImages)
- (NSAttributedString *)attributedStringByReplacingOccurancesOfString:(NSString *)string withInlineImage:(UIImage *)inlineImage scale:(CGFloat)inlineImageScale;
@end
.
@implementation NSMutableAttributedString (InlineImages)
- (void)replaceCharactersInRange:(NSRange)range withInlineImage:(UIImage *)inlineImage scale:(CGFloat)inlineImageScale {
if (floorf(inlineImageScale) == 0)
inlineImageScale = 1.0f;
// Create resized, tinted image matching font size and (text) color
UIImage *imageMatchingFont = [inlineImage imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
{
// Font size
NSDictionary *attributesForRange = [self attributesAtIndex:range.location effectiveRange:nil];
UIFont *fontForRange = [attributesForRange valueForKey:NSFontAttributeName];
CGSize imageSizeMatchingFontSize = CGSizeMake(inlineImage.size.width * (fontForRange.capHeight / inlineImage.size.height), fontForRange.capHeight);
// Some scaling for prettiness
CGFloat defaultScale = 1.4f;
imageSizeMatchingFontSize = CGSizeMake(imageSizeMatchingFontSize.width * defaultScale, imageSizeMatchingFontSize.height * defaultScale);
imageSizeMatchingFontSize = CGSizeMake(imageSizeMatchingFontSize.width * inlineImageScale, imageSizeMatchingFontSize.height * inlineImageScale);
imageSizeMatchingFontSize = CGSizeMake(ceilf(imageSizeMatchingFontSize.width), ceilf(imageSizeMatchingFontSize.height));
// Text color
UIColor *textColorForRange = [attributesForRange valueForKey:NSForegroundColorAttributeName];
// Make the matching image
UIGraphicsBeginImageContextWithOptions(imageSizeMatchingFontSize, NO, 0.0f);
[textColorForRange set];
[inlineImage drawInRect:CGRectMake(0 , 0, imageSizeMatchingFontSize.width, imageSizeMatchingFontSize.height)];
imageMatchingFont = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
// Text attachment with image
NSTextAttachment *textAttachment = [NSTextAttachment new];
textAttachment.image = imageMatchingFont;
NSAttributedString *imageString = [NSAttributedString attributedStringWithAttachment:textAttachment];
[self replaceCharactersInRange:range withAttributedString:imageString];
}
@end
@implementation NSAttributedString (InlineImages)
- (NSAttributedString *)attributedStringByReplacingOccurancesOfString:(NSString *)string withInlineImage:(UIImage *)inlineImage scale:(CGFloat)inlineImageScale {
NSMutableAttributedString *attributedStringWithImages = [self mutableCopy];
[attributedStringWithImages.string enumerateOccurancesOfString:string usingBlock:^(NSRange substringRange, BOOL *stop) {
[attributedStringWithImages replaceCharactersInRange:substringRange withInlineImage:inlineImage scale:inlineImageScale];
}];
return [attributedStringWithImages copy];
}
@end