Question

我发现了UILabel的一些奇怪的行为，带有属性文本和表情符号图标。不知道如何解决它。

以下是我每次在文本字段中更改文字时的代码。

NSLog(@"bef %@", self.textView.attributedText);
self.textView.attributedText = [[NSMutableAttributedString alloc] initWithString:self.textView.text];
NSLog(@"after %@", self.textView.attributedText);

输出是：

bef qwe{
    NSFont = "<UICTFont: 0x7fc88b0e23d0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSOriginalFont = "<UICTFont: 0x7fc88b0e23d0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
}{
    NSFont = "<UICTFont: 0x7fc88a4d6aa0> font-family: \"Apple Color Emoji\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSOriginalFont = "<UICTFont: 0x7fc88b0e23d0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
}1{
    NSFont = "<UICTFont: 0x7fc88b0e23d0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
}
2014-11-06 15:49:04.256 Inbot Dev[31162:506070] after qwe{
    NSFont = "<UICTFont: 0x7fc88b0e23d0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSOriginalFont = "<UICTFont: 0x7fc88b0e23d0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
}1{
    NSFont = "<UICTFont: 0x7fc88a4d6aa0> font-family: \"Apple Color Emoji\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
    NSOriginalFont = "<UICTFont: 0x7fc88b0e23d0> font-family: \"Helvetica\"; font-weight: normal; font-style: normal; font-size: 12.00pt";
}

实际问题是＆＃34; 1＆＃34;表情符号进入表情符号块后，但它不应该。我在NSMutableAttributedString上做了一些自定义装饰，这只是我缩小问题的一个例子。

更有意思的是，只有在数字之后才会出现数字，如果我在表情符号之后放了字母......

似乎在设置attributionText时，它正在为表情符号做一些额外的事情。以前有人遇到过这个问题吗？

Answer 1

实际上，在创建NSMutableAttributedString时，通过为整个文本设置默认字体来解决问题。

仅在使用Helvetica后备时才会出现问题

我正在做的是：

NSMutableParagraphStyle *paragraphStyle = [NSMutableParagraphStyle new];
paragraphStyle.alignment = style == kDecorateStringStyleDark ? NSTextAlignmentLeft : NSTextAlignmentRight;
NSMutableAttributedString *attString = [[NSMutableAttributedString alloc] initWithString:sourceString attributes:@{ NSParagraphStyleAttributeName : paragraphStyle }];
//this part below fixed the problem (by default it was using Helvetica)
[attString addAttribute:NSFontAttributeName value:FONT(FONT_MEDIUM, 14.0f) range:NSMakeRange(0, sourceString.length)];
//after that you can decorate parts of text as you want to

UILabel.attributedText与Emoji字体结合的奇怪行为

1 个答案: