Swift UIButton左文右图
let button = UIButton(frame: CGRect(x: 0, y: 100, width: 150, height: 44))
button.center = view.center
let image = UIImage(named: "xxx", in: xxx, compatibleWith: nil)
button.setImage(image, for: .normal)
button.imageView?.contentMode = .scaleAspectFit
let space: CGFloat = 15
button?.setTitle("设置label image动态宽度自适应", for: .normal)
let lableWith = button?.titleLabel?.intrinsicContentSize.width
let imageWidth = button?.imageView?.intrinsicContentSize.width
button?.titleEdgeInsets = UIEdgeInsets(top: 0, left: -(imageWidth ?? 0), bottom: 0, right: imageWidth ?? 0)
button?.imageEdgeInsets = UIEdgeInsets(top: 0, left: (lableWith ?? 0) + space, bottom: 0, right: -((lableWith ?? 0) + space))