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我正努力將約束添加到位置查找器按鈕我想在swift中添加到UIMapView,到目前爲止,我的約束似乎沒有任何工作,並且按鈕卡在頂端左邊角落,這裏是我的代碼:使用Swift以編程方式向按鈕添加約束
override func loadView()
{
mapView = MKMapView()
view = mapView
let margins = view.layoutMarginsGuide
let locationButton = UIButton()
mapView.addSubview(locationButton)
locationButton.setTitle("find location", for: [])
locationButton.backgroundColor = UIColor.lightGray().withAlphaComponent(0.6)
locationButton.layer.cornerRadius = 3
locationButton.sizeToFit()
locationButton.translatesAutoresizingMaskIntoConstraints = true
locationButton.bottomAnchor.constraint(equalTo: margins.bottomAnchor, constant: 20).isActive = true
locationButton.leadingAnchor.constraint(equalTo: margins.leadingAnchor).isActive = true
locationButton.trailingAnchor.constraint(equalTo: margins.trailingAnchor).isActive = true
}
任何幫助將真誠地感謝。
locationButton.translatesAutosizingMaskIntoContraints = false,並且locationButton.bottomAnchor.constraint(equalTo:margins.bottomAnchor,恆:-50).isActive = TRUE,似乎已經解決了我的問題。 – user6537725
如果您發現自己的問題的解決方案,請將其添加爲未來Google員工的答案:) –