ios 如何使用 SwiftUI 调整图像大小？
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How to resize Image with SwiftUI?
提问by subdan
I have a large image in Assets.xcassets. How to resize this image with SwiftUI to make it small?
我在 Assets.xcassets 中有一个大图像。如何使用 SwiftUI 调整此图像的大小以使其变小？
I tried to set frame but it doesn't work:
我试图设置框架但它不起作用：
Image(room.thumbnailImage)
.frame(width: 32.0, height: 32.0)
回答by rraphael
You should use .resizable()before applying any size modifications on an Image.
您应该.resizable()在对Image.
Image(room.thumbnailImage).resizable()
.frame(width: 32.0, height: 32.0)
回答by Confused Vorlon
How about this:
这个怎么样：
struct ResizedImage: View {
var body: some View {
Image("myImage")
.resizable()
.scaledToFit()
.frame(width: 200.0,height:200)
}
}
the image view is 200x200, but the image maintains the original aspect ratio (rescaling within that frame)
图像视图为 200x200，但图像保持原始纵横比（在该帧内重新缩放）
回答by Womble
Expanding on @rraphael's answer and comments:
扩展@rraphael 的回答和评论：
As of Xcode 11 beta 2, you can scale an image to arbitrary dimensions, while maintaining the original aspect ratio by wrapping the image in another element.
从 Xcode 11 beta 2 开始，您可以将图像缩放到任意尺寸，同时通过将图像包装在另一个元素中来保持原始纵横比。
e.g.
例如
struct FittedImage: View
{
let imageName: String
let width: CGFloat
let height: CGFloat
var body: some View {
VStack {
Image(systemName: imageName)
.resizable()
.aspectRatio(1, contentMode: .fit)
}
.frame(width: width, height: height)
}
}
struct FittedImagesView: View
{
private let _name = "checkmark"
var body: some View {
VStack {
FittedImage(imageName: _name, width: 50, height: 50)
.background(Color.yellow)
FittedImage(imageName: _name, width: 100, height: 50)
.background(Color.yellow)
FittedImage(imageName: _name, width: 50, height: 100)
.background(Color.yellow)
FittedImage(imageName: _name, width: 100, height: 100)
.background(Color.yellow)
}
}
}
Results
结果
(For some reason, the image is showing as a bit blurry. Rest assured that the real output is sharp.)
（出于某种原因，图像显示有点模糊。请放心，实际输出是清晰的。）
回答by amp.dev
use .resizable() for resize image in SwiftUI
使用 .resizable() 在 SwiftUI 中调整图像大小
Image("example-image")
.resizable()
.aspectRatio(contentMode: .fit)
回答by dinesh sharma
If you want to use aspect ratiowith resizing then you can use following code:
如果要在调整大小时使用纵横比，则可以使用以下代码：
Image(landmark.imageName).resizable()
.frame(width: 56.0, height: 56.0)
.aspectRatio(CGSize(width:50, height: 50), contentMode: .fit)
回答by rust
Well, It's seemspretty easy in SwiftUI/ Following the demo they given : https://developer.apple.com/videos/play/wwdc2019/204
好吧，在SwiftUI 中似乎很容易/按照他们给出的演示：https: //developer.apple.com/videos/play/wwdc2019/204
struct RoomDetail: View {
let room: Room
var body: some View {
Image(room.imageName)
.resizable()
.aspectRatio(contentMode: .fit)
}
Hope it helps.
希望能帮助到你。
回答by sachin jeph
If you want to resize the image in swiftUI just use the following code :
如果要在 swiftUI 中调整图像大小，只需使用以下代码：
import SwiftUI
struct ImageViewer : View{
var body : some View {
Image("Ssss")
.resizable()
.frame(width:50,height:50)
}
}
But here is problem with this. If you add this Image inside a Button, the Image will not be shown, just a block of blue colour would be there. To solve this issue, just do this :
但是这里有问题。如果您将此图像添加到按钮中，则不会显示图像，只会显示一块蓝色。要解决此问题，只需执行以下操作：
import SwiftUI
struct ImageViewer : View{
var body : some View {
Button(action:{}){
Image("Ssss")
.renderingMode(.original)
.resizable()
.frame(width:50,height:50)
}
}
}
回答by cmlcrn17
My image name is img_Logo and you can change image name define image properties this:
VStack(alignment: .leading, spacing: 1) {
//Image Logo Start
Image("img_Logo")
.resizable()
.padding(.all, 10.0)
.frame(width: UIScreen.main.bounds.width * 0.4, height: UIScreen.main.bounds.height * 0.2)
//Image Logo Done
}
回答by Hanny
Since we shouldn't hardcode/fix the image size. Here is a better way to provide range to adjust according to the screen's resolution on different devices.
因为我们不应该硬编码/修复图像大小。这是提供范围以根据不同设备上的屏幕分辨率进行调整的更好方法。
Image("ImageName Here")
.resizable()
.frame(minWidth: 60.0, idealWidth: 75.0, maxWidth: 95.0, minHeight: 80.0, idealHeight: 95.0, maxHeight: 110.0, alignment: .center)
.scaledToFit()
.clipShape(Capsule())
.shadow(color: Color.black.opacity(5.0), radius: 5, x: 5, y: 5)
回答by ShigaSuresh
Use below code.
使用下面的代码。
Image("image")
.resizable()
.frame(width: 60, height: 60, alignment: .leading)
.cornerRadius(30.0)
