Question

我们知道Apple Watch有两种屏幕尺寸：38mm和42mm。 WKInterfaceDevice类提供名为screenBounds的可读属性。我为WKInterfaceDevice编写了一个扩展，尝试添加一种方法来检测当前的设备类型。

import WatchKit

enum WatchResolution {

    case Watch38mm, Watch42mm
}

extension WKInterfaceDevice {

    class func currentResolution() -> WatchResolution {

        let watch38mmRect = CGRectMake(0.0, 0.0, 136.0, 170.0)
        let watch42mmRect = CGRectMake(0.0, 0.0, 156.0, 195.0)

        let currentBounds = WKInterfaceDevice.currentDevice().screenBounds

        if CGRectEqualToRect(currentBounds, watch38mmRect) {

            return WatchResolution.Watch38mm
        } else {

            return WatchResolution.Watch42mm
        }
    }
}

这是检测Apple Watch尺寸的正确方法吗？我在Apple文档中缺少另一种方法吗？

Answer 1

您的代码看起来不错，但有一些小问题：

您没有“未知”屏幕尺寸的案例（可能在将来发布）
您使用的是CGRectMake，但在Swift中您应该使用CGRect初始化程序
您使用的是CGRectEqualToRect，但在Swift中，您可以使用==或switch
你明确地返回了WatchResolution枚举，但你不需要明确--Swift会从你的方法签名中找出它
您宣布watch42mmRect但未将其用于任何内容

我会像这样重写它：

enum WatchResolution {
    case Watch38mm, Watch42mm, Unknown
}

extension WKInterfaceDevice {
    class func currentResolution() -> WatchResolution {
        let watch38mmRect = CGRect(x: 0, y: 0, width: 136, height: 170)
        let watch42mmRect = CGRect(x: 0, y: 0, width: 156, height: 195)

        let currentBounds = WKInterfaceDevice.currentDevice().screenBounds

        switch currentBounds {
        case watch38mmRect:
            return .Watch38mm
        case watch42mmRect:
            return .Watch42mm
        default:
            return .Unknown
        }
    }
}

Answer 2

更新Swift 4：

它包括Watch分辨率的新推出：

enum WatchResolution {
    case Watch38mm, Watch40mm,Watch42mm,Watch44mm, Unknown  
}

extension WKInterfaceDevice {
class func currentResolution() -> WatchResolution {
    let watch38mmRect = CGRect(x: 0, y: 0, width: 136, height: 170)
    let watch40mmRect = CGRect(x: 0, y: 0, width: 162, height: 197)
    let watch42mmRect = CGRect(x: 0, y: 0, width: 156, height: 195)
    let watch44mmRect = CGRect(x: 0, y: 0, width: 184, height: 224)

    let currentBounds = WKInterfaceDevice.current().screenBounds

    switch currentBounds {
    case watch38mmRect:
        return .Watch38mm
    case watch40mmRect:
        return .Watch40mm
    case watch42mmRect:
        return .Watch42mm
    case watch44mmRect:
        return .Watch44mm
    default:
        return .Unknown
    }
  } 
}

用法

let resol = WKInterfaceDevice.currentResolution()
    switch resol {
    case .Watch38mm, .Watch42mm:
        // Do Something
    case .Watch40mm, .Watch44mm:
        // Do Something
    default:
        // Do Something
    }

参考链接： Apple Developer Watch Interface Link

希望有帮助。...

谢谢

Answer 3

这就是我正在做的：

enum WatchModel {
    case w38, w40, w42, w44, unknown
}

extension WKInterfaceDevice {

    static var currentWatchModel: WatchModel {
        switch WKInterfaceDevice.current().screenBounds.size {
        case CGSize(width: 136, height: 170):
            return .w38
        case CGSize(width: 162, height: 197):
            return .w40
        case CGSize(width: 156, height: 195):
            return .w42
        case CGSize(width: 184, height: 224):
            return .w44
        default:
            return .unknown
    }
  }
}

Answer 4

你的方法看起来很好，没有任何问题。另一种解决方案是使用WKInterfaceController的contentFrame属性。如果宽度为312（156）像素，那么其42毫米也是38毫米。

enter image description here

Answer 5

CGRect rect = [WKInterfaceDevice currentDevice].screenBounds;
if (rect.size.height == 195.0) {
    // Apple Watch 42mm
}else if (rect.size.height == 170.0){
    // Apple Watch 38mm 
}

Answer 6

检查screenBounds似乎不再适用于带有真实设备的iOS 9的xCode 7，Watch 38mm返回的手表大小始终为156x195。

我的（不好）替代方案是根据视图结构检查viewcontroller contentFrame的宽度或高度

Answer 7

以上所有解决方案都运行良好。与screenBounds（[[WKInterfaceDevice currentDevice] screenBounds]）一起，也可以检查screenScale（[[WKInterfaceDevice currentDevice] screenScale]）。从这个意义上说，实际大小将是screenBounds * screenScale。

更多参考：https://developer.apple.com/watch/human-interface-guidelines/specifications/

Answer 8

对于Swift 4较短的例子：

enum WatchType {
    case watch38mm, watch42mm
}

extension WKInterfaceDevice {

    class var currentResolution: WatchType {
        // Apple Watch 38mm 136x170 - 42mm 156x195
        return WKInterfaceDevice.current().screenBounds.width == 136 ? .watch38mm : .watch42mm
    }

}

Answer 9

我这样做是为了避免自己过于依赖当前的大小和将来的证明

public enum WatchSizeClass {
    case small, regular
}

public extension WKInterfaceDevice {
    static var currentWatchSizeClass: WatchSizeClass {
        if WKInterfaceDevice.current().screenBounds.size.width < 150 {
            return .small
        } else {
            return .regular
        }
    }
}

现在，.small仅返回38mm。

Answer 10

Swift 5 版本的@Aaron Brager答案（+支持新的Apple Watch）。

enum WatchResolution {
case Watch38mm, Watch40mm, Watch42mm, Watch44mm, Unknown
}

extension WKInterfaceDevice {

class func currentResolution() -> WatchResolution {

    let watch38mmRect = CGRect(x: 0, y: 0, width: 136, height: 170)
    let watch40mmRect = CGRect(x: 0, y: 0, width: 162, height: 197)
    let watch42mmRect = CGRect(x: 0, y: 0, width: 156, height: 195)
    let watch44mmRect = CGRect(x: 0, y: 0, width: 184, height: 224)

    let currentBounds = WKInterfaceDevice.current().screenBounds

    switch currentBounds {
    case watch38mmRect:
        return .Watch38mm
    case watch40mmRect:
        return .Watch40mm
    case watch42mmRect:
        return .Watch42mm
    case watch44mmRect:
        return .Watch44mm
    default:
        return .Unknown
    }
}
}


/*
 all resolutions
 40mm: 394×324
 44mm: 448×368
 38mm: 340×272
 42mm: 390×312
 */

如何判断当前运行的Apple Watch尺寸/尺寸是38mm还是42mm？

10 个答案: