相关疑难解决方法(0)

我正在寻找一些关于如何使用Swift2for 在圆形边缘周围绘制简单单线串的最新帮助/提示iOS9.我看到涉及旧ObjC片段的相当陈旧的例子,并且仅限于此OS X.这在自定义UIView子类的drawRect()方法中是否可以在iOS中实现？

我有几十个文本，我想lastTextBaseline放置它们的前导基线 ( ) 位于特定坐标处。position只能设置中心。例如：

import SwiftUI
import PlaygroundSupport
struct Location: Identifiable {
    let id = UUID()
    let point: CGPoint
    let angle: Double
    let string: String
}

let locations = [
    Location(point: CGPoint(x: 54.48386479999999, y: 296.4645408), angle: -0.6605166885682314, string: "Y"),
    Location(point: CGPoint(x: 74.99159120000002, y: 281.6336352), angle: -0.589411952788817, string: "o"),
]

struct ContentView: View {
    var body: some View {
        ZStack {
            ForEach(locations) { run in
                Text(verbatim: run.string)
                    .font(.system(size: 48))
                    .border(Color.green)
                    .rotationEffect(.radians(run.angle))
                    .position(run.point)

                Circle()  // Added to show …