ios – 中心UIButton文本,用于浮动 *** 作按钮,如收件箱应用

概述floatingButton = UIButton(x: blocx, y:blocy, width: imageSize, height: imageSize, target: self, action: "clickedFloatingButton")floatingButton!.backgroundColor = CozyColors.StatCardSkipfloatingButto

floatingbutton = UIbutton(x: blocx,y:blocy,wIDth: imageSize,height: imageSize,target: self,action: "clickedfloatingbutton")floatingbutton!.backgroundcolor = Cozycolors.StatCardSkipfloatingbutton!.layer.cornerRadius = floatingbutton!.frame.size.wIDth / 2floatingbutton!.setTitle("+",forState: UIControlState.normal)floatingbutton!.setTitlecolor(Cozycolors.themeWhite,forState: UIControlState.normal)floatingbutton!.TitleLabel?.Font = UIFont(name: CozyStyles.themeFontname,size: imageSize*2/3)vIEw.addSubvIEw(floatingbutton!)

结果如下：

如您所见,加号按钮未正确对齐中心.如何在不添加UILabel作为子视图的情况下将其正确放在中间？

解决方法 试试这段代码：

var floatingbutton = UIbutton(frame: CGRectMake(10,20,50,50))    floatingbutton.backgroundcolor = UIcolor.redcolor()    floatingbutton.layer.cornerRadius = floatingbutton.frame.size.wIDth / 2    floatingbutton.setTitle("+",forState: UIControlState.normal)    floatingbutton.setTitlecolor(UIcolor.whitecolor(),forState: UIControlState.normal)    floatingbutton.TitleLabel?.Font = UIFont(name: floatingbutton.TitleLabel!.Font.familyname,size: 50)    floatingbutton.TitleEdgeInsets = UIEdgeInsetsMake(-10,0)    vIEw.addSubvIEw(floatingbutton)

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