titleView = UIView()
self.view.addSubview(titleView)
titleView.mas_makeConstraints({ (makeBlock) in
let make = makeBlock! as MASConstraintMaker
make.top.equalTo()(view)
make.left.equalTo()(view)
make.right.equalTo()(view)
make.height.mas_equalTo()(system_titleViewHeight)
})