xamarin自动布局不起作用 - 它没有完全受限制

1 回答

• 4

  根据我的经验，iOS Designer可能非常缺陷，特别是对于约束，它更容易使用界面构建器 .

  right click on the storyboard > Open with > Xcode Interface builder

  从您发布的代码看起来，只有顶部标签的约束已被设置，其他一切都没有在那里看到您发布的代码的界面构建器的截图：
  

  我会在接口构建器中添加约束，如下所示：

  <?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，如果您正在尝试适应其他屏幕，则不会将前导设置为225，因为其他设备将具有不同的屏幕尺寸，并且它可能会在屏幕外 . 因此，最好尝试将相对位置定位到视图的中心垂直或水平，或者使用常量中的比率 .

  另外要默认使用xcode界面构建器打开storyboard和xib，你可以使用this awesome addon from ColbyWilliams

  回复于 2024-05-02T16:26:22+08:00