如何TabView在SwiftUI中为选中的Tabbar项目设置动画?
例如,给选定的项目一个.scaleEffect()带有.spring()动画或某物的内容,如下所示:
到目前为止,这是我尝试过的:
struct MyTabbedView: View {
@State var enlargeIt1 = false
@State var enlargeIt2 = true
var body: some View {
TabView {
Text("Item 1")
.onAppear {
self.enlargeIt1.toggle()
self.enlargeIt2.toggle()
}
.tabItem{
VStack{
Image(systemName: "music.note")
.font(self.enlargeIt1 ? .system(size: 30) : .system(size: 15) )
.animation(.interpolatingSpring(mass: 0.7, stiffness: 200, damping: 10, initialVelocity: 4))
Text("Music")
}
}.tag(1)
Text("Item 2")
.onAppear {
self.enlargeIt1.toggle()
self.enlargeIt2.toggle()
}
.tabItem{
VStack{
Image(systemName: "music.mic")
.font(self.enlargeIt2 ? .system(size: 30) : .system(size: 15) )
.animation(.interpolatingSpring(mass: …Run Code Online (Sandbox Code Playgroud) 如何使用 SwiftUI 框架为一系列图像(比如 Frame-1.png 到 Frame-6)设置动画?
我试过创建一个“图像”数组。然后我将 UIImage.animatedImage(with: images, duration: 1.0) 方法分配给一个名为“animatedImage”的变量,最后我在“ContentView.swift”的“body”中尝试了 Image(uiImage:animatedImage)
var images: [UIImage]! = [UIImage(named: "Sequence/frame-1")!,
UIImage(named: "Sequence/frame-2")!,
UIImage(named: "Sequence/frame-3")!,
UIImage(named: "Sequence/frame-4")!,
UIImage(named: "Sequence/frame-5")!,
UIImage(named: "Sequence/frame-6")!
]
let animatedImage : UIImage! = UIImage.animatedImage(with: images, duration: 1.0)
//////Then in the ContentView.swift I've tried this code:
struct ContentView : View {
var body: some View {
Image(uiImage: animatedImage)
}
}
Run Code Online (Sandbox Code Playgroud)
当我运行程序时,它只显示第一帧,但我期望帧的动画
如何在 SwiftUI 中使用Charts库制作图表视图
换句话说,如何UIViewRepresentable为它做一个?
我试图用3D条绘制bar3d和Axes3D的matplotlib和限制z轴范围为[0,1],但.set_zlim3d(0,1)方法不能正常工作,有相对边界蜱是额外的偏移。这些额外的偏移量由双头紫色箭头显示:
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
fig = plt.figure()
ax = Axes3D(fig, azim=65, elev=30)
ax.set_zlim3d(0,1)
Run Code Online (Sandbox Code Playgroud)
如何从边界刻度中删除额外的偏移量,即0.0和1.0?
(有人可能会说尝试:ax.set_zlim3d(0.0000001, 0.9999999)它会产生松动0.0和1.0滴答声)
我使用ZStack设计了一个“ CardView”,其中背景层是渐变,前景层是PNG(或PDF)图像(图像是在Adobe Illustrator中绘制的黄色路径(如圆形))。
当我将ZStack放置在NavigationLink中时,渐变保持不变且很好,但是图像获得带蓝色的覆盖颜色(如按钮的默认颜色),因此不再有黄色路径(该路径为带蓝色的)。
如何获得前景PNG(或PDF)图像的原始颜色?
import SwiftUI
struct MyCardView : View {
let cRadius : CGFloat = 35
let cHeight : CGFloat = 220
var body: some View {
NavigationView {
NavigationLink(destination: Text("Hello")) {
ZStack {
RoundedRectangle(cornerRadius: cRadius)
.foregroundColor(.white)
.opacity(0)
.background(LinearGradient(gradient: Gradient(colors: [Color(red: 109/255, green: 58/255, blue: 242/255),Color(red: 57/255, green: 23/255, blue: 189/255)]), startPoint: .leading, endPoint: .trailing), cornerRadius: 0)
.cornerRadius(cRadius)
.frame(height: cHeight)
.padding()
Image("someColoredPathPNGimage")
}
}
}
}
}
Run Code Online (Sandbox Code Playgroud) 将我的 python Flask 应用程序上传到 Heroku 时,出现以下错误:
ERROR: Could not find a version that satisfies the requirement dataclasses==0.8 (from -r /tmp/build_d980c139/requirements.txt (line 4)) (from versions: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6)
remote: ERROR: No matching distribution found for dataclasses==0.8 (from -r /tmp/build_d980c139/requirements.txt (line 4))
remote: ! Push rejected, failed to compile Python app.
Run Code Online (Sandbox Code Playgroud) 我想创建一个包含许多Text的VStack,每个 Text 之间的间距为 20 个点。我希望我的VStack与屏幕左侧(或父View 的前导侧)对齐。