ios - Get the vertical Size of a UILabel which has more than one line? -


i have uilabel more 1 line: 

let servicedescription: uilabel = uilabel() servicedescription.text = "some long text..."  servicedescription.numberoflines = 0 servicedescription.sizetofit() self.contentview.addsubview(servicedescription)

then add autolayout constraints: 

servicedescription.snp_makeconstraints { (make) -> void in   make.top.equalto(self.contentview_snp_top).offset(24)   make.left.equalto(self.contentview).offset(20)   make.right.equalto(self.contentview).offset(-20) }

now want compute size label need on screen did: 

let newsize: cgsize = servicedescription.systemlayoutsizefittingsize(uilayoutfittingcompressedsize) println("servicedescription size: \(newsize)")

the result is: 

(3408.0, 95.5)

i did preceding commands in viewdidload().

how correct size of label on screen?

you don't need calculate height, label knows height after has laid out,

    override func viewdidload() {         super.viewdidload()         println(label.frame.height) // 21         label.text = "some long text make text go on more 1 line"         label.layoutifneeded()         println(label.frame.height) // 101.5     }

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