Question

是在swift ui中设置图像宽度和高度大小的任何方法。我找到了 frame 方法，但这不是我想要的。

这是我的快捷文件。

 import SwiftUI

struct HeaderBar: View {

    var body: some View {

        VStack(alignment: .center, spacing: 0.0) {

            HStack(alignment: .center) {
                Spacer()
                Image("jojologo-yellow")
                .frame(width: 30.0, height: 30.0) //that is not the solution to change image size
                .padding()
                Spacer()
            }
            .background(Color.orange)
            Spacer()

        }

    }
}

struct HeaderBar_Previews: PreviewProvider {
    static var previews: some View {
        HeaderBar()
    }
}

如果我可以在Image中使用调整大小方法，那将很棒。例如

Image("jojologo-yellow").size(width: 30.0, height: 30.0)

所以，我的问题是“是否有任何方法可以在快速ui中调整图像的大小

Answer 1

也许您正在寻找Image("jojologo-yellow").resizable().frame(width: 30.0, height: 30.0)？

Answer 2

您可以使用此功能调整图像大小；

X509Certificate

像这样打电话；

func resizeImage(image: UIImage, targetSize: CGSize) -> UIImage {
    let size = image.size

    let widthRatio  = targetSize.width  / size.width
    let heightRatio = targetSize.height / size.height

    // Figure out what our orientation is, and use that to form the rectangle
    var newSize: CGSize
    if(widthRatio > heightRatio) {
        newSize = CGSize(width: size.width * heightRatio, height: size.height * heightRatio)
    } else {
        newSize = CGSize(width: size.width * widthRatio,  height: size.height * widthRatio)
    }

    // This is the rect that we've calculated out and this is what is actually used below
    let rect = CGRect(x: 0, y: 0, width: newSize.width, height: newSize.height)

    // Actually do the resizing to the rect using the ImageContext stuff
    UIGraphicsBeginImageContextWithOptions(newSize, false, 1.0)
    image.draw(in: rect)
    let newImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return newImage!
}

Answer 3

在代码中添加.resizable()修饰符

  Image("yourImageName")
    .resizable()
    .scaledToFill() // add if you need
    .frame(width: 30.0, height: 30.0) // as per your requirement
    .clipped()

我可以在Swift UI中更改图像大小吗

3 个答案: