I have a mutable attributed string without NSStrikethroughStyleAttributeName attribute like this:
NSMutableAttributedString *str1 = [[NSMutableAttributedString alloc] initWithString:@"aaaa" attributes:@{NSStrikethroughStyleAttributeName:[NSNumber numberWithInteger:NSUnderlineStyleSingle]}];
and another mutable attributed string with NSStrikethroughStyleAttributeName attribute like this:
NSMutableAttributedString *str2 = [[NSMutableAttributedString alloc] initWithString:@"bbbb"];
and a whole string containing two strings above:
NSMutableAttributedString *labelString = [[NSMutableAttributedString alloc] init];
[labelString appendAttributedString:str1];
[labelString appendAttributedString:str2];
when I attach the whole string to a UILabel:
_label.attributedText = labelString;
It both display well in iOS7 and iOS8, like this:
aaaa bbbb
But when I exchange their positions:
[labelString appendAttributedString:str2];
[labelString appendAttributedString:str1];
It display correctly in iOS7 but not correctly in iOS8
ios7: bbbb aaaa ios8: bbbbaaaa
It seems that in iOS8, UILabel doesn't render the strikethrough correctly if the first character in the attributed string is not strikethroughed. I think this is a bug in iOS8, is there anyone who encounter the same problem with me?
NSMutableAttributedString *str2 = [[NSMutableAttributedString alloc] initWithString:@"bbbb" attributes:@{NSStrikethroughStyleAttributeName:[NSNumber numberWithInteger:NSUnderlineStyleNone]}];
它应该有所帮助
On iOS8.1.1 we have more problems with setting NSMutableAttributedString , like with NSStrikethroughStyleAttributeName .
If your attributes are not changing try this and it will be.
I started reasoning by the UILabel that is spirit to chaneger attributes, so if we assume that the NSStrikethroughStyleAttributeName not initialized the label text so we will need the initialize it .
What I do is initializing mutableAttributedString by a none NSStrikethroughStyleAttributeName and change this attribute to highlight: result is:
NSMutableAttributedString * string = [[NSMutableAttributedString alloc] initWithString: myString attributes: @ {NSStrikethroughStyleAttributeName: @ (NSUnderlineStyleNone)}];
[string addAttributes: @ {NSStrikethroughStyleAttributeName: @ (NSUnderlineStyleSingle)} range: [myString rangeOfString: mySubString]];
[MyLabel setAttributedText: string];
effective result <= iOS8.1.1
修复了iOS8中的错误:Strike通过字符串的第一个字母和清晰的颜色,然后在你想要的范围内打击文本。
When you are not starting the index from 0, try this:
NSMutableAttributedString *attributedStr = [[NSMutableAttributedString alloc] initWithString:@"Hello"];
[attributedStr addAttributes:@{NSStrikethroughStyleAttributeName : @(NSUnderlineStyleSingle)} range:NSMakeRange(1, str.length)];
[attributedStr addAttributes:@{NSStrikethroughStyleAttributeName : @(NSUnderlineStyleNone)} range:NSMakeRange(0, 1)];
I see the same issue and changing NSStrikethroughStyleAttributeName's value to NSUnderlineStyleNone doesn't fix it. Sure seems like iOS 8 bug.
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