我无法将下拉列表与悬停下拉列表的父级中心对齐.我试过text-align:center为整个.nav .navbar li元素,但它不起作用.我试图设置保证金和左:50%的整个ul.dropdown菜单是下拉列表,但它不起作用.这是html代码:
<ul class="nav navbar-nav navbar-right" id="headerDropdowns">
<li><div class="btn-toolbar">
<div class="btn-group">
<button class="btnCustom" data-toggle="dropdown" data-hover="dropdown" data-delay="1000">Our Difference</button>
<ul class="dropdown-menu">
<li><a tabindex="-1" href="#">Made in the USA</a></li>
<li class="divider"></li>
<li><a tabindex="-1" href="#">Human Grade</a></li>
<li class="divider"></li>
<li><a tabindex="-1" href="#">Ingredients Fresh</a></li>
<li class="divider"></li>
<li><a tabindex="-1" href="#">USDA Meats</a></li>
<li class="divider"></li>
<li><a tabindex="-1" href="#">Our Story</a></li>
<li class="divider"></li>
<li><a tabindex="-1" href="#">Campare</a></li>
</ul>
</div>
</li>
</ul>
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我应该在哪个类下拉菜单或nav navbar-nav中进行对齐,我应该设置什么?
目标
获取数据以显示在 scrollView
预期结果
实际结果
选择
use List
,但不灵活(不能去掉分隔符,不能有多个列)
代码
struct Object: Identifiable {
var id: String
}
struct Test: View {
@State var array = [Object]()
var body: some View {
// return VStack { // uncomment this to see that it works perfectly fine
return ScrollView(.vertical) {
ForEach(array) { o in
Text(o.id)
}
}
.onAppear(perform: {
self.array = [Object(id: "1"),Object(id: "2"),Object(id: "3"),Object(id: "4"),Object(id: "5")]
})
}
}
Run Code Online (Sandbox Code Playgroud) 我根据客户要求创建了新的 React Native 项目。我有知识,但还没有完成任何项目,所以请给我任何项目结构如何构建这个项目。
或者给我任何 git hub 链接
谢谢
我是 React-Native 的新手,我已将 react-native-vector-icons 库手动添加到 Xcode 和 Android Studio。如果使用 Xcode 运行代码,它会成功执行而没有任何问题。但是如果我尝试从终端(react-native run-ios)运行代码,它会在模拟器中显示“无法识别的字体系列材料”。但是如果我运行命令(react-native run-android),这个工作也是一样的。
** BUILD FAILED **
The following build commands failed:
CompileC /Users/user/Documents/Test/JobsNProfiles/ios/build/Build/Intermediates.noindex/RNVectorIcons.build/Debug-iphonesimulator/RNVectorIcons.build/Objects-normal/x86_64/RCTFont+FA5.o /Users/user/Documents/Test/JobsNProfiles/node_modules/react-native-vector-icons/RNVectorIconsManager/RCTFont+FA5.m normal x86_64 objective-c com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)
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我的目标是确保容器中的文本根据其父级进行缩放。当容器只包含一个 Text 视图时,它工作得很好,如下所示:
import SwiftUI
struct FontScalingExperiment: View {
var body: some View {
Text("Hello World ~!")
.font(.system(size: 500))
.minimumScaleFactor(0.01)
.lineLimit(1)
.padding()
.background(
RoundedRectangle(cornerRadius: 20)
.fill(Color.yellow)
.scaledToFill()
)
}
}
struct FontScalingExperiment_Previews: PreviewProvider {
static var previews: some View {
Group {
FontScalingExperiment()
.previewLayout(.fixed(width: 100, height: 100))
FontScalingExperiment()
.previewLayout(.fixed(width: 200, height: 200))
FontScalingExperiment()
.previewLayout(.fixed(width: 300, height: 300))
FontScalingExperiment()
.previewLayout(.fixed(width: 400, height: 400))
}
}
}
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结果:
但是,当我们有更复杂的 View 时,我们不能使用相同的方法根据其父级大小自动缩放文本,例如:
import SwiftUI
struct IndicatorExperiment: View {
var body: some View { …
Run Code Online (Sandbox Code Playgroud) 我正在尝试创建100%宽度的对话框.但是作为原始设置,它被限制为80vw.
.mat-dialog-container{
max-width:80vw;
}
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我试过以下方法来覆盖这个值.但他们没有成功.
.mat-dialog-container {
max-width: none;
width: 100vw;
height: 100vh;
}
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和
.mat-dialog-container {
max-width: none !important;
}
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有人请告诉我如何覆盖80vw到100vw.谢谢.
我试着做
react-native run-android
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但是它出现了错误
--------------
FAILURE: Build failed with an exception.
* What went wrong:
Could not create service of type ScriptPluginFactory using BuildScopeServices.createScriptPluginFactory().
> Could not create service of type PluginResolutionStrategyInternal using BuildScopeServices.createPluginResolutionStrategy().
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 0s
Could not install the app on the …
Run Code Online (Sandbox Code Playgroud) 我正在试验 SwiftUI 和 Metal。我有 2 个窗口,一个带有各种列表和控件,另一个带有金属窗口。
我让滑块数据更新了 Metal 窗口,但是当我移动滑块时,FPS 从 60 下降到 25 左右。我删除了视图之间的所有链接,移动滑块仍然会降低金属窗口中的 FPS。
似乎列表视图也会减慢 FPS。
我在启动时使用以下方法创建金属窗口:
metalWindow = NSWindow(contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
backing: .buffered, defer: false)
metalWindow.center()
metalWindow.setFrameAutosaveName("Metal Window")
metalWindow.makeKeyAndOrderFront(nil)
mtkView = MTKView()
mtkView.translatesAutoresizingMaskIntoConstraints = false
metalWindow.contentView!.addSubview(mtkView)
metalWindow.contentView!.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "|[mtkView]|", options: [], metrics: nil, views: ["mtkView" : mtkView!]))
metalWindow.contentView!.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|[mtkView]|", options: [], metrics: nil, views: ["mtkView" : mtkView!]))
device = MTLCreateSystemDefaultDevice()!
mtkView.device = device
mtkView.colorPixelFormat = .bgra8Unorm
commandQueue …
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