UiTextView 和UILabel 高度计算

最新推荐文章于 2021-06-07 17:28:14 发布

原创最新推荐文章于 2021-06-07 17:28:14 发布 · 398 阅读

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本文探讨了在不同字体大小和宽度下计算文本高度的方法，并优化文本布局以提高显示效率。

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+ (float)heightForLabelString:(NSString *)str fontSize:(float)fontSize andWidth:(float)width

{

CGSize size= CGSizeMake(width, CGFLOAT_MAX);

NSDictionary * tdic = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:fontSize],NSFontAttributeName,nil];

size = [value boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin |NSStringDrawingUsesFontLeading attributes:tdic context:nil].size;

return size.height;

}

+ (float) heightForTextString:(NSString *)str fontSize:(float)fontSize andWidth:(float)width{

float fPadding = 16.0; // 8.0px x 2

CGSize constraint = CGSizeMake(width - fPadding, CGFLOAT_MAX);

NSDictionary * tdic = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:fontSize],NSFontAttributeName,nil];

CGSize size = [str boundingRectWithSize:constraint options:NSStringDrawingUsesLineFragmentOrigin |NSStringDrawingUsesFontLeading attributes:tdic context:nil].size;

float fHeight = size.height + 16.0;

return fHeight;

}