获取高度需要在UILabel中拟合字符串

Question

在我的Xamarin.iOS应用程序中，我有一个宽度为300且包含很长字符串的UILabel。我需要调整UILabel的框架的大小，使其高度适合整个字符串，同时保持宽度为300.

UILabel myLabel;
myLabel.Text = "VERY LONG STRING!!!!!!!!111.....youGetThePoint"
myLabel.Font = UIFont.SystemFontOfSize(20, UIFontWeight.Bold);
// now I want to make myLabel's width 300 and the height to be the appropriate amount to see the whole text.

Answer 1

您可以使用UILabel.sizeThatFits(CGSize size)：

UILabel myLabel = ...;
myLabel.Text = "VERY LONG STRING!!!!!!!!111.....youGetThePoint"
myLabel.Font = UIFont.SystemFontOfSize(20, UIFontWeight.Bold);
myLabel.PreferredMaxLayoutWidth = 300
myLabel.Lines = 0

var maxSize = new CGSize((nfloat)300, nfloat.MaxValue);
var labelSize = myLabel.SizeThatFits(maxSize);

labelSize应该为您提供标签显示的超长文本的大小。

myLabel.Frame.Height = labelSize.Height;