xamarin 自动布局不起作用 - 它在完全约束时不遵守约束
xamarin auto layout is not working - it doesn't respect the constraints while it's fully constrainted
我在 Xamarin.iOS 项目的故事板中使用自动布局。
为什么当我从 Iphone4 切换到 iPhone 5 或 o Iphon6 等时我的约束没有得到遵守
我试过所有模式...我也试过在 GENERIC 模式下设计，它的标签、按钮在屏幕上保持固定位置，当我切换到不同的渲染模式时，它会关闭并显示橙色Xamarin Studio - 设计师。
AutoLayout，尺寸分类已勾选！并且控件完全受限，换句话说，设置了 x、y、高度、宽度等。
我也关注了这个关于 AutoLAyout 的简短介绍视频，但我没有得到相同的结果：https://www.youtube.com/watch?v=pDlCx0C3v74
我的第二期是：
当我更改属性时，例如高度从 21 到 30 然后我按下 "update frames based on constraints" 然后我希望设计师的高度将调整为 30。但是当我点击 "Update frames..." 按钮然后 属性值设置回 21...我认为这应该是其他方式...!!!!
有什么建议吗？
Xamarin Studio
版本 6.1.3（内部版本 19）
切换到Iphone6
切换到iPhone 4
已更新（添加了故事板代码）
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11762" systemVersion="16C67" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BYZ-38-t0r" launchScreen="YES">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11757"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
<viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<subviews>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Hi there this is a label" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="3" translatesAutoresizingMaskIntoConstraints="NO">
<rect key="frame" x="225" y="290" width="254" height="21"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
<constraints>
<constraint id="10" firstItem="3" firstAttribute="height" constant="21"/>
<constraint id="13" firstItem="3" firstAttribute="width" constant="254"/>
</constraints>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="one more label is here" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="4" translatesAutoresizingMaskIntoConstraints="NO" fixedFrame="YES">
<rect key="frame" x="225" y="344" width="231" height="21"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
</subviews>
<constraints>
<constraint id="9" firstItem="3" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="225"/>
<constraint id="12" firstItem="3" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" constant="270"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="0.0" y="0.0"/>
</scene>
</scenes>
</document>
根据我的经验，iOS 设计器可能存在很多问题，尤其是对于约束而言，它更易于使用界面构建器。
right click on the storyboard > Open with > Xcode Interface builder
从您发布的代码来看，似乎只设置了顶部标签的约束，其他一切都没有设置，请参阅您发布的代码的界面生成器的屏幕截图：
我会像这样在界面生成器中添加约束：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11762" systemVersion="16C67" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BYZ-38-t0r" launchScreen="YES">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11757"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
<viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<subviews>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Hi there this is a label" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="3" translatesAutoresizingMaskIntoConstraints="NO">
<rect key="frame" x="225" y="290" width="254" height="21"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
<constraints>
<constraint id="10" firstItem="3" firstAttribute="height" constant="21"/>
<constraint id="13" firstItem="3" firstAttribute="width" constant="254"/>
</constraints>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="one more label is here" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="4" translatesAutoresizingMaskIntoConstraints="NO" fixedFrame="YES">
<rect key="frame" x="225" y="344" width="231" height="21"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
</subviews>
<constraints>
<constraint id="9" firstItem="3" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="225"/>
<constraint id="12" firstItem="3" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" constant="270"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="0.0" y="0.0"/>
</scene>
</scenes>
</document>
通常，如果您试图适应其他屏幕，则不会将行距设置为常量 225，因为其他设备将具有不同的屏幕尺寸，并且它可能会超出屏幕范围。所以最好尝试相对于视图的中心垂直或水平定位或使用常量中的比率。
还可以默认使用 xcode 界面生成器打开故事板和 xib，您可以使用 this awesome addon from ColbyWilliams
我在 Xamarin.iOS 项目的故事板中使用自动布局。 为什么当我从 Iphone4 切换到 iPhone 5 或 o Iphon6 等时我的约束没有得到遵守
我试过所有模式...我也试过在 GENERIC 模式下设计，它的标签、按钮在屏幕上保持固定位置，当我切换到不同的渲染模式时，它会关闭并显示橙色Xamarin Studio - 设计师。
AutoLayout，尺寸分类已勾选！并且控件完全受限，换句话说，设置了 x、y、高度、宽度等。
我也关注了这个关于 AutoLAyout 的简短介绍视频，但我没有得到相同的结果：https://www.youtube.com/watch?v=pDlCx0C3v74
我的第二期是： 当我更改属性时，例如高度从 21 到 30 然后我按下 "update frames based on constraints" 然后我希望设计师的高度将调整为 30。但是当我点击 "Update frames..." 按钮然后 属性值设置回 21...我认为这应该是其他方式...!!!!
有什么建议吗？
Xamarin Studio
版本 6.1.3（内部版本 19）
切换到Iphone6
切换到iPhone 4
已更新（添加了故事板代码）
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11762" systemVersion="16C67" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BYZ-38-t0r" launchScreen="YES">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11757"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
<viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<subviews>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Hi there this is a label" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="3" translatesAutoresizingMaskIntoConstraints="NO">
<rect key="frame" x="225" y="290" width="254" height="21"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
<constraints>
<constraint id="10" firstItem="3" firstAttribute="height" constant="21"/>
<constraint id="13" firstItem="3" firstAttribute="width" constant="254"/>
</constraints>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="one more label is here" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="4" translatesAutoresizingMaskIntoConstraints="NO" fixedFrame="YES">
<rect key="frame" x="225" y="344" width="231" height="21"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
</subviews>
<constraints>
<constraint id="9" firstItem="3" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="225"/>
<constraint id="12" firstItem="3" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" constant="270"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="0.0" y="0.0"/>
</scene>
</scenes>
</document>
根据我的经验，iOS 设计器可能存在很多问题，尤其是对于约束而言，它更易于使用界面构建器。
right click on the storyboard > Open with > Xcode Interface builder
从您发布的代码来看，似乎只设置了顶部标签的约束，其他一切都没有设置，请参阅您发布的代码的界面生成器的屏幕截图：
我会像这样在界面生成器中添加约束：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11762" systemVersion="16C67" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BYZ-38-t0r" launchScreen="YES">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11757"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
<viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<subviews>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Hi there this is a label" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="3" translatesAutoresizingMaskIntoConstraints="NO">
<rect key="frame" x="225" y="290" width="254" height="21"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
<constraints>
<constraint id="10" firstItem="3" firstAttribute="height" constant="21"/>
<constraint id="13" firstItem="3" firstAttribute="width" constant="254"/>
</constraints>
</label>
<label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="one more label is here" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="4" translatesAutoresizingMaskIntoConstraints="NO" fixedFrame="YES">
<rect key="frame" x="225" y="344" width="231" height="21"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<fontDescription key="fontDescription" type="system" pointSize="17"/>
<nil key="textColor"/>
<nil key="highlightedColor"/>
</label>
</subviews>
<constraints>
<constraint id="9" firstItem="3" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="225"/>
<constraint id="12" firstItem="3" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" constant="270"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="0.0" y="0.0"/>
</scene>
</scenes>
</document>
通常，如果您试图适应其他屏幕，则不会将行距设置为常量 225，因为其他设备将具有不同的屏幕尺寸，并且它可能会超出屏幕范围。所以最好尝试相对于视图的中心垂直或水平定位或使用常量中的比率。
还可以默认使用 xcode 界面生成器打开故事板和 xib，您可以使用 this awesome addon from ColbyWilliams