Swift - 重写导航栏返回按钮

// 重写导航栏返回按钮方法

func configBackBtn() -> Void {

// 返回按钮

let backButton = UIButton(type: .custom)

// 给按钮设置返回箭头图片

backButton.setImage(UIImage(named: "NavigationBar_goBack_icon"), for: .normal)

// 设置frame

backButton.frame = CGRect(x: 200, y: 13, width: 18, height: 18)

backButton.addTarget(self, action: #selector(back), for: .touchUpInside)

// 自定义导航栏的UIBarButtonItem类型的按钮

let backView = UIBarButtonItem(customView: backButton)

// 重要方法，用来调整自定义返回view距离左边的距离

let barButtonItem = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)

barButtonItem.width = -5

// 返回按钮设置成功

navigationItem.leftBarButtonItems = [barButtonItem, backView]

}