iPhone 7 Plus的水平尺寸等級仍然緊湊嗎？

Question

按照類似的參考這個或這個 ，我采取的景觀iPhone 7加應定期大小類。

根據此參考 ，這是當前視圖控制器中的代碼：

- (void) traitCollectionDidChange: (UITraitCollection *) previousTraitCollection {
    [super traitCollectionDidChange: previousTraitCollection];
    NSLog(@"current trait collection: %@",self.traitCollection);
    NSLog(@"previous trait collection: %@", previousTraitCollection);
}

這是在iPhone 7 Plus上從縱向轉到橫向時控制台上的輸出：

current trait collection: <UITraitCollection: 0x1c44efd00; _UITraitNameUserInterfaceIdiom = Phone, _UITraitNameDisplayScale = 3.000000, _UITraitNameDisplayGamut = P3, _UITraitNameHorizontalSizeClass = Compact, _UITraitNameVerticalSizeClass = Compact, _UITraitNameTouchLevel = 0, _UITraitNameInteractionModel = 1, _UITraitNameUserInterfaceStyle = 1, _UITraitNameUserInterfaceLayoutDirection = 0, _UITraitNameForceTouchCapability = 2, _UITraitNamePreferredContentSizeCategory = UICTContentSizeCategoryL, _UITraitNameDisplayCornerRadius = 0.000000>
previous trait collection: <UITraitCollection: 0x1c02fa900; _UITraitNameUserInterfaceIdiom = Phone, _UITraitNameDisplayScale = 3.000000, _UITraitNameDisplayGamut = P3, _UITraitNameHorizontalSizeClass = Compact, _UITraitNameVerticalSizeClass = Regular, _UITraitNameTouchLevel = 0, _UITraitNameInteractionModel = 1, _UITraitNameUserInterfaceStyle = 1, _UITraitNameUserInterfaceLayoutDirection = 0, _UITraitNameForceTouchCapability = 2, _UITraitNamePreferredContentSizeCategory = UICTContentSizeCategoryL, _UITraitNameDisplayCornerRadius = 0.000000>

水平尺寸類保持緊湊，我期望從緊湊型變為常規型。

使用iOS 11.1.2和Xcode 9.1

Answer 1

您是否已打開設備的顯示縮放？

https://help.apple.com/iphone/11/#/iphd6804774e

在“標准”模式下，橫向中的水平尺寸類別將為“常規”。 在“縮放”模式下，它將是緊湊的。