要加载html字符串,用人说,直接用webView啊!但是,有时候我们只需要显示2行文字,如此少的内容却要在复杂的UI排版中加入一个占用资源较多的webview,得不偿失。这里要说的是,我们其实可以用label即可加载html字符的,用富文本转一下html字符串即可。
//str是要显示的字符串
NSMutableAttributedString * attrString = [[NSMutableAttributedString alloc] initWithData:[str dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType} documentAttributes:nil error:nil];
[attrString addAttributes:@{NSBaselineOffsetAttributeName: @(5),//设置基线偏移值,取值为 NSNumber (float),正值上偏,负值下偏,可使UILabel文本垂直居中
NSFontAttributeName:[UIFont systemFontOfSize:14]} range:NSMakeRange(0, attrString.length)];
self.descLabel.attributedText = attrString;
//计算html字符串高度
NSMutableAttributedString *htmlString =[[NSMutableAttributedString alloc] initWithData:[str dataUsingEncoding:NSUTF8StringEncoding] options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType, NSCharacterEncodingDocumentAttribute:[NSNumber numberWithInt:NSUTF8StringEncoding]} documentAttributes:NULL error:nil];
[htmlString addAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:14]} range:NSMakeRange(0, htmlString.length)];
CGSize textSize = [htmlString boundingRectWithSize:(CGSize){ScreenWidth - 20, CGFLOAT_MAX} options:NSStringDrawingUsesLineFragmentOrigin context:nil].size;
return textSize.height ;