Mar*_*vie 14 html fonts nsattributedstring ios7
我有一个UITextView,我正在管理一个NSAttributedString,最初通过键盘正常输入.我将属性字符串保存为HTML,看起来很好.当我再次加载它,并将其转换回HTML中的属性字符串时,字体大小似乎发生了变化.
例如,加载时的HTML如下所示:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="Content-Style-Type" content="text/css">
<title></title>
<meta name="Generator" content="Cocoa HTML Writer">
<style type="text/css">
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 21.0px Helvetica; color: #000000; -webkit-text- stroke: #000000}
span.s1 {font-family: 'Helvetica'; font-weight: normal; font-style: normal; font-size: 21.00pt; font-kerning: none}
</style>
</head>
<body>
<p class="p1"><span class="s1">There is some text as usual lots of text</span></p>
</body>
</html>
我转换它并使用以下代码检查属性:
// convert to attributed string
NSError *err;
NSAttributedString *as = [[NSAttributedString alloc] initWithData:data3
options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)}
documentAttributes:nil
error:&err] ;
NSMutableAttributedString *res = [as mutableCopy];
[res enumerateAttribute:NSFontAttributeName inRange:NSMakeRange(0, res.length) options:0 usingBlock:^(id value, NSRange range, BOOL *stop) {
if (value) {
UIFont *oldFont = (UIFont *)value;
NSLog(@"On Loading: Font size %f, in range from %d length %d", oldFont.pointSize, range.location, range.length);
}
}];
输出显示字体大小从21增加到28:
On Loading: Font size 28.000000, in range from 0 length 40
On Loading: Font size 21.000000, in range from 40 length 1
基本上,每次加载字符串时,字体大小都会增加.我需要将它存储为HTML而不是NSData,因为它也将被其他平台使用.
有没有人有任何想法为什么会这样？
Kis*_*aak 15
我也遇到了这个问题,我通过迭代到属性并重新设置旧字体大小来修复它,如下所示
NSMutableAttributedString *res = [attributedText mutableCopy];
[res beginEditing];
[res enumerateAttribute:NSFontAttributeName
inRange:NSMakeRange(0, res.length)
options:0
usingBlock:^(id value, NSRange range, BOOL *stop) {
if (value) {
UIFont *oldFont = (UIFont *)value;
UIFont *newFont = [oldFont fontWithSize:15];
[res addAttribute:NSFontAttributeName value:newFont range:range];
}
}];
[res endEditing];
[self.textFileInputView setAttributedText:res];
小智 6
使用<span>和css对我有用,将HTML解析为NSAttributedText - 如何设置字体？:
// HTML -> NSAttributedString
+ (NSAttributedString *)attributedStringFromHTML:(NSString *)html {
NSError *error;
NSDictionary *options = @{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType};
NSAttributedString *attrString = [[NSAttributedString alloc] initWithData:[html dataUsingEncoding:NSUTF8StringEncoding] options:options documentAttributes:nil error:&error];
if(!attrString) {
NSLog(@"creating attributed string from HTML failed: %@", error.debugDescription);
}
return attrString;
}
// force font thrugh <span> & css
+ (NSAttributedString *)attributedStringFromHTML:(NSString *)html withFont:(UIFont *)font {
return [Util attributedStringFromHTML:[NSString stringWithFormat:@"<span style=\"font-family: %@; font-size: %f\";>%@</span>", font.fontName, font.pointSize, html]];
}
这将设置字体名称和大小,但不会影响样式.
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