How to resize Image with SwiftUI?

Question

I have a large image in Assets.xcassets. How to resize this image with SwiftUI to make it small?

I tried to set frame but it doesn't work:

Image(room.thumbnailImage)
    .frame(width: 32.0, height: 32.0)

Answer 1

You should use .resizable() before applying any size modifications on an Image.

Image(room.thumbnailImage)
    .resizable()
    .frame(width: 32.0, height: 32.0)

Answer 2

How about this:

struct ResizedImage: View {
    var body: some View {
        Image("myImage")
            .resizable()
            .scaledToFit()
            .frame(width: 200, height: 200)
    }
}

The image view is 200x200, but the image maintains the original aspect ratio (rescaling within that frame).

Answer 3

In SwiftUI, use the .resizable() method to resize an image. By using .aspectRatio() and specifying a ContentMode, you can either "Fit" or "Fill" the image, as appropriate.

For example, here is code that resizes the image by fitting:

Image("example-image")
.resizable()
.aspectRatio(contentMode: .fit)

Answer 4

Expanding on @rraphael's answer and comments:

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.

e.g.

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

(For some reason, the image is showing as a bit blurry. Rest assured that the real output is sharp.)

Answer 5

You can resize images based on what you are using:

Image from Assets:

Image("logo")
  .resizable()
  .scaledToFill() // OR .scaledToFit()
  .frame(width: 40, height: 40, alignment: .center)

Image from remote url by using AsyncImage:

AsyncImage(url: URL(string: "https://example.com/icon.png"))
   .frame(width: 50, height: 50)

With placeholder:

AsyncImage(url: URL(string: "https://example.com/icon.png")) { image in
   image.resizable()
} placeholder: {
   ProgressView()
}
.frame(width: 50, height: 50)

Images from SF symbols:

by specifying font:

Image(systemName: "xmark")
   .font(.title)

By using frames:

Image(systemName: "xmark")
  .resizable()
  .scaledToFit()
  .frame(width: 40, height: 40, alignment: .center)

Answer 6

struct AvatarImage: View {
    var body: some View {

            Image("myImage")
                .resizable()
                .scaledToFill() // <=== Saves aspect ratio
                .frame(width: 60.0, height:60)
                .clipShape(Circle())

    }
}

Answer 7

Image(room.thumbnailImage)
    .resizable()
    .frame(width: 32.0, height: 32.0,alignment: .center)

In SwiftUI .resizable() attribute helps to resize an image. After that we can give some custom size.

Answer 8

Another approach is to use the scaleEffect modifier:

Image(room.thumbnailImage)
    .resizable()
    .scaleEffect(0.5)

Answer 9

Well, It's seems pretty easy in SwiftUI.

Following the demo they given : 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.

Answer 10

If you want to use aspect ratio with resizing then you can use following code:

Image(landmark.imageName).resizable()
                .frame(width: 56.0, height: 56.0)
                .aspectRatio(CGSize(width:50, height: 50), contentMode: .fit)

Answer 11

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.

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)

Answer 12

By default, image views automatically size themselves to their contents, which might make them go beyond the screen. If you add the resizable() modifier then the image will instead automatically be sized so that it fills all the available space:

Image("example-image")
    .resizable()

However, that may also cause the image to have its original aspect ratio distorted, because it will be stretched in all dimensions by whatever amount is needed to make it fill the space.

If you want to keep its aspect ratio you should add an aspectRatio modifier using either .fill or .fit, like this:

Image("example-image")
    .resizable()
    .aspectRatio(contentMode: .fit)

Answer 13

Image(systemName: "person.fill")
  .font(.system(size: 13))

will also work if you are using systemName.

Answer 14

Note : 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
                    }

Answer 15

SwiftUI provided us .resizable() modifier that will let SwiftUI to resizes an image to fit its space

struct ContentView: View {
    var body: some View {
        Image("home")
            .antialiased(true) //for smooth edges for scale to fill
            .resizable() // for resizing
            .scaledToFill() // for filling image on ImageView
    }
}

Answer 16

As they said you have to use for resizing an Image on SwiftUI :

Call an image -> Image("somename") then, you add -> .resizable()

and now the image is resizable

next you can apply .aspectRatio to fit dimension or just fill the frame.

Example for simple usage of resizable:

Image("somename")
.resizable()
.frame(width: 50px, height: 50px) 

Answer 17

Use the font modifier with a dynamic type on an Image view:

Image(systemName: "nose")
    .font(.largeTitle)

Answer 18

If you want to resize the image in swiftUI just use the following code :

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 :

import SwiftUI

struct ImageViewer : View{
    var body : some View {
        Button(action:{}){
        Image("Ssss")
        .renderingMode(.original)
        .resizable()
        .frame(width:50,height:50)
    }
   }
}

Answer 19

It is very important to understand logical structure of code. Like in SwiftUI an image is not resizable by default. Thus, to resize any image you have to make it resizable by applying the .resizable() modifier immediately after you declare an Image view.

Image("An Image file name")
    .resizable()

Answer 20

To make an image scales to fit the current view, we use the resizable() modifier, which resizes an image to fit available space.

for Example:

 Image("ImageName")
            .resizable()
            .aspectRatio(contentMode: .fit)
            .frame(width: 200, height: 200, alignment: .center)

Answer 21

You can define Image Properties as follow:-

   Image("\(Image Name)")
   .resizable() // Let you resize the images
   .frame(width: 20, height: 20) // define frame size as required
   .background(RoundedRectangle(cornerRadius: 12) // Set round corners
   .foregroundColor(Color("darkGreen"))      // define foreground colour 

Answer 22

Use .resizable() method after image name. Make sure usage of .resizable() need to declare before any modification.

like this:

Image("An Image file name")
    .resizable()
//add other modifications here 

Answer 23

It is suggested to use the following code to match multiple screen sizes:

Image("dog")
    .resizable()
    .frame(minWidth: 200, idealWidth: 400, maxWidth: 600, minHeight: 100, idealHeight: 200, maxHeight: 300, alignment: .center)

Answer 24

You also can use:

Image("Example")
   .scaleEffect(NumberWithSizeBetweenZeroAndOne)

Answer 25

You can use resizable() property, but keep it in mind that you cannot use resizable in a common modifier so you have to use Image extension to achieve it.

extension Image {
    func customModifier() -> some View {
        self
            .resizable()
            .aspectRatio(contentMode: .fit)
    }

Answer 26

To resize an image in SwiftUI you need to use the .resizable() modifier before using the .frame() modifier

Image("imageName")
    .resizable()
    .frame(width: 20, height: 20)