Snapkit: No iOS8 solution for pinning views to top/bottomLayoutGuide

[tomquist]

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  Issue Info

| Info | Value |
| --- | --- |
| Platform | ios |
| Platform Version | 8.0 |
| SnapKit Version | 3.0.1 |
| Integration Method | cocoapods/ |

Issue Description

In v0.21.0 it was possible to make constraints by pinning them to the bottom of the topLayoutGuide like this:

view.snp_makeConstraints { make in
        make.top.equalTo(viewController.topLayoutGuideBottom)
}

This has been removed in fc298ae and replaced with UILayoutGuide but there is no replacement for iOS8 since topLayoutGuide is only available in iOS9+:

view.snp_makeConstraints { make in
        make.top.equalTo(topLayoutGuide.snp.bottom)
}

[robertjpayne]

@tomquist Ack, sorry I've left out the UIViewController DSL from the 3.0.0 release. I'll try and get this added back in by end of next week.

[sahandnayebaziz]

@robertjpayne that would be great. I use those all the time

[sahandnayebaziz]

@robertjpayne if you want to give a couple of first steps, I'm sure we could get a PR going.

[robertjpayne]

@sahandnayebaziz you can look at ConstraintViewDSL and ConstraintLayoutGuideDSL you're basically going to want to implement a ConstraintViewControllerDSL.

Please make sure it's only available on iOS/tvOS though.

[serluca]

Hi @tomquist

Are you sure that topLayoutGuide is only available in iOs 9+ the documentation says iOS 7.0+.

Reference:
topLayoutGuide
bottomLayoutGuide

[robertjpayne]

Yea actually @tomquist did you actually try this? I was just going to implement this but I believe it's unecessary.

You should be able to do:

self.container.snp.makeConstraints { (make) -> Void in
  make.top.equalTo(vc.topLayoutGuide.snp.bottom)
  make.bottom.equalTo(vc.bottomLayoutGuide.snp.top)
}

In iOS 8+ via SnapKit. The name is confusing it's actually UILayoutSupport rather than a UILayoutGuide.

[robertjpayne]

Closing this as I believe it's no longer an issue and resolved by above comment ^^

[jacinzhang]

Did't work for me, when I use navigationController. It's start from screen top, and my code

    func loadWebView() -> Void {
        let webConfiguration = WKWebViewConfiguration()
        webView = WKWebView(frame: .zero, configuration: webConfiguration)
        webView.uiDelegate = self
        view.addSubview(webView)

        webView.snp.makeConstraints { (maker) in
            maker.left.right.equalTo(view)
            maker.top.equalTo(topLayoutGuide.snp.top)
            maker.height.equalTo(300)
        }

        let myURL = URL(string: "http://bbs.iosre.com/")
        let myRequest = URLRequest(url: myURL!)
        webView.load(myRequest)
    }

and show me

[robertjpayne]

@jacinzhang maker.top.equalTo(topLayoutGuide.snp.top) should probably be maker.top.equalTo(topLayoutGuide.snp.bottom)?

[jacinzhang]

@robertjpayne thanks, I'm careless.