UIButton图像未调整大小-Swift

Question

我正在创建一个带有png图像的自定义按钮，就像我以前做过数百次一样。

但由于某种原因，这一次图像没有随着按钮的大小而缩放。

func constructInfoViewBtns() {
    let buttonsView = UIView.init(frame: CGRectMake(0, 90, self.infoView!.frame.width, 90))
    let playPauseBtn = UIButton(type: UIButtonType.Custom) as UIButton
    let playPauseBtnImg : UIImage = UIImage(named: "pauseBtn")!
    playPauseBtn.setImage(playPauseBtnImg, forState: .Normal)
    playPauseBtn.imageView?.contentMode = UIViewContentMode.ScaleAspectFill
    playPauseBtn.frame = CGRectMake(0, 0, 55, 55)
    playPauseBtn.backgroundColor = UIColor.blueColor()
    playPauseBtn.center = CGPointMake(buttonsView.frame.width/2, buttonsView.frame.height/2)
    playPauseBtn.addTarget(self, action: "playPauseTrack:", forControlEvents: .TouchDown)
    self.playPauseBtn = playPauseBtn
    buttonsView.addSubview(self.playPauseBtn!)
    self.infoView!.addSubview(buttonsView)
}

我得到的是一个蓝色框，其中的按钮图像小于按钮的边框。就像是垫的什么的。。。

Answer 1

添加此项并尝试

playPauseBtn.imageEdgeInsets = UIEdgeInsetsMake(25,25,25,25)