简单示例
代码语言：javascript
复制override func viewDidLoad() {
super.viewDidLoad()
baiduMap = BMKMapView(forAutoLayout: {}())
self.mapView.addSubview(baiduMap);
self.mapView.addConstraints(self.layoutConstraints())
}
func layoutConstraints() -> [NSLayoutConstraint]{
let views = ["map": self.baiduMap ]
let metrics = ["margin": 0]
var result = NSLayoutConstraint.constraintsWithVisualFormat("H:|-(margin)-[map]-(margin)-|", options:NSLayoutFormatOptions.AlignAllTop, metrics: metrics, views: views)
result = NSLayoutConstraint.constraintsWithVisualFormat("V:|-(margin)-[map]-(margin)-|", options:NSLayoutFormatOptions.AlignAllLeft , metrics:metrics, views: views);
return result
}
