SwiftUI Tap Area Below Button - ios

I have a View in my app that shows an Image as the background (via Binding) and then it has a button to download the image and another to favorite the image.
The problem is that when I use the .ignoreSafeArea on a whole ZStack, the tap area on the button shifts to below the button body. I have the images scaled to fit and clipped and I tried moving the buttons down with padding, and I have tried seeing if there was an alternative to making the whole ZStack ignore the safe area with no luck.
I should also mention that I have put the image as the background with the .background property, I tried just putting it at the top of a ZStack but that would also affect the buttons positions.
I should also mention I am relatively new to Swift
struct photoDetail: View {
let image: realPhoto
#State var textControl: Bool
init(image: realPhoto) {
self.image = image
self.textControl = image.favorited
}
var body: some View {
ZStack {
VStack(alignment: .leading) {
Spacer()
HStack {
Text("created by: \(image.username)")
.padding(5)
.foregroundColor(.white)
.background(Color(.gray).opacity(0.8))
.padding(.leading, 20)
.font(.system(size:20, weight: .semibold))
.padding(.bottom, 50)
.cornerRadius(4)
Spacer()
}.padding(.bottom, 60)
}
VStack {
HStack {
Spacer()
Button {
let imageSaver = ImageSaver()
imageSaver.writeToPhotoAlbum(image: UIImage(data: image.image)!)
} label: {
Image(systemName: "square.and.arrow.down")
.resizable()
.scaledToFit()
.frame(width: 20)
.padding(8)
}
Button {
favoriteToggle()
} label: {
Image(systemName: textControl == false || image.favorited == false ? "heart": "heart.fill")
.resizable()
.scaledToFit()
.frame(width: 25)
.padding(8)
}.padding(.trailing, 30)
}.padding(.top, 100)
Spacer()
}
}.onAppear() {
self.textControl = image.favorited
}.background(
Image(uiImage: UIImage(data: image.image)!)
.resizable()
.frame(maxWidth: .infinity, maxHeight: .infinity)
.scaledToFill()
.clipped()
).ignoresSafeArea()
}
}

Try to add .contentShape(Rectangle()) to your buttons. It should limit tappable area to your button view

Related

How to create design covering back button and top bar fully with cross button above it?

I am trying to create below design using swiftUI but not able to find proper approach.
I tried but my image is not covering back button but coming below to back button
Expected design
VStack(spacing: 16) {
VStack {
ZStack(alignment: .topTrailing) {
Image("defaultImage")
.resizable()
.frame( height: 200)
Button("Cancel", action: {
print("cancel")
})
.padding(12)
}
}
}
My Design :(
You might want to do a lot of try in SwiftUI to get a custom design right. gave it a quick try for you and added comments on the code so you can understand most of what i did.
this is the quick result i got (with a random background i got on internet)
import SwiftUI
struct FirstView: View{
var body: some View{
NavigationView {
VStack{
NavigationLink(destination: BackgroundImageNav()){
Text("Go to the view")
.font(.title)
}
}
}
}
}
struct BackgroundImageNav: View {
#Environment(\.presentationMode) var presentationMode
// remplacing the back button action, (only problem is that this disable the swipe back)
var body: some View {
ZStack {
// ZStack help you having your image behind the other views
VStack {
Image("defaultImage")
.resizable()
.frame(height: 180)
.edgesIgnoringSafeArea(.all)
Spacer()
// having a spacer that push the image on the top and ignoring the safe area
}
VStack(alignment:.leading){
HStack{
Button(action:{
presentationMode.wrappedValue.dismiss()
// back button action
}){
Image(systemName:"chevron.left")
.resizable()
.aspectRatio(contentMode: .fit)
.frame(width: 30, height: 30)
.foregroundColor(.white)
}
Spacer()
Rectangle()
.fill(Color.white)
.frame(width: 200, height: 80, alignment: .center)
Spacer()
Button(action:{
// do something
}){
Image(systemName: "xmark")
.resizable()
.frame(width: 24, height: 24)
.foregroundColor(.white)
}
}.padding()
Text("Title")
.bold()
.font(.title)
.foregroundColor(.black)
.background(Color.white)
.padding(24)
Spacer()
}
}.navigationBarHidden(true)
// removing the bar to customize the back button
}
}
struct backgroundImage_Previews: PreviewProvider {
static var previews: some View {
FirstView()
}
}

Applying resizable() on an Image affects text in SwiftUI

I am working on SwiftUI to make a widget and I can't figure out if I'm doing something wrong or there's a bug in SwiftUI.
I have an Image that I use as a background and at the top there's a text. If I apply resizable() to the Image it also affects the behaviour of the text.
var body: some View {
ZStack {
VStack {
Image(affirmation.customImageName ?? "c_0")
.resizable()
.scaledToFill()
.clipped()
}
HStack {
Text(affirmation.title)
.font(.body)
.multilineTextAlignment(.leading)
.lineLimit(nil)
Spacer()
}
.padding(.leading, 5)
.padding(.top, 5)
}
}
Creates this view:
While this code:
var body: some View {
ZStack {
VStack {
Image(affirmation.customImageName ?? "c_0")
.scaledToFill()
.clipped()
}
HStack {
Text(affirmation.title)
.font(.body)
.multilineTextAlignment(.leading)
.lineLimit(nil)
Spacer()
}
.padding(.leading, 5)
.padding(.top, 5)
}
}
Creates this view:

SwiftUI - Button with Image is clickable outside

I have a ScrollView with multiple Buttons. A Button contains a Image and a Text underneath.
As the images are pretty large I am using .scaledToFill and .clipped. And it seems that the 'clipped' part of the image is still clickable even if it's not shown.
In the video you see I am clicking on button 1 but button 2 is triggered.
This is my Coding. The Image is inside the View Card.
struct ContentView: View {
#State var useWebImage = false
#State var isSheetShowing = false
#State var selectedIndex = 0
private let images = [
"https://images.unsplash.com/photo-1478368499690-1316c519df07?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2706&q=80",
"https://images.unsplash.com/photo-1507154258-c81e5cca5931?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2600&q=80",
"https://images.unsplash.com/photo-1513310719763-d43889d6fc95?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2734&q=80",
"https://images.unsplash.com/photo-1585766765962-28aa4c7d719c?ixlib=rb-1.2.1&auto=format&fit=crop&w=2734&q=80",
"https://images.unsplash.com/photo-1485970671356-ff9156bd4a98?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2734&q=80",
"https://images.unsplash.com/photo-1585607666104-4d5b201d6d8c?ixlib=rb-1.2.1&auto=format&fit=crop&w=2700&q=80",
"https://images.unsplash.com/photo-1577702066866-6c8897d06443?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2177&q=80",
"https://images.unsplash.com/photo-1513809491260-0e192158ae44?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2736&q=80",
"https://images.unsplash.com/photo-1582092723055-ad941d1db0d4?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2700&q=80",
"https://images.unsplash.com/photo-1478264635837-66efba4b74ba?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjF9&auto=format&fit=crop&w=2682&q=80"
]
var body: some View {
NavigationView {
ScrollView {
VStack(spacing: 40) {
Text(useWebImage ? "WebImage is used." : "SwiftUI Image is used")
.font(.system(size: 18))
.bold()
.kerning(0.5)
.padding(.top, 20)
Toggle(isOn: $useWebImage) {
Text("Use WebImage")
.font(.system(size: 18))
.bold()
.kerning(0.5)
.padding(.top, 20)
}
ForEach(0..<images.count) { index in
Button(action: {
self.selectedIndex = index
self.isSheetShowing.toggle()
}) {
Card(imageUrl: self.images[index], index: index, useWebImage: self.$useWebImage)
}
.buttonStyle(PlainButtonStyle())
}
}
.padding(.horizontal, 20)
.sheet(isPresented: self.$isSheetShowing) {
DestinationView(imageUrl: self.images[self.selectedIndex], index: self.selectedIndex, useWebImage: self.$useWebImage)
}
}
.navigationBarTitle("Images")
}
}
}
struct Card: View {
let imageUrl: String
let index: Int
#Binding var useWebImage: Bool
var body: some View {
VStack {
if useWebImage {
WebImage(url: URL(string: imageUrl))
.resizable()
.indicator(.activity)
.animation(.easeInOut(duration: 0.5))
.transition(.fade)
.scaledToFill()
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 250, maxHeight: 250, alignment: .center)
.cornerRadius(12)
.clipped()
} else {
Image("image\(index)")
.resizable()
.aspectRatio(contentMode: .fill)
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 250, maxHeight: 250, alignment: .center)
.cornerRadius(12)
.clipped()
}
HStack {
Text("Image #\(index + 1) (\(useWebImage ? "WebImage" : "SwiftUI Image"))")
.font(.system(size: 18))
.bold()
.kerning(0.5)
Spacer()
}
}
.padding(2)
.border(Color(.systemRed), width: 2)
}
}
Do you have an idea how to fix this issue?
I already tried to use .resizable(resizingMode: .tile) but I need to shrink the image before I could use just a tile.
For detailed information you can also find the project on GitHub GitHub Project
I would appreciate your help a lot.
The .clipped affects only drawing, and by-default Button has all content clickable not depending what it is.
So if you want make your button clickable only in image area, you have to limit hit testing only to its rect explicitly and disable everything else.
Here is a demo of possible approach. Tested with Xcode 11.4 / iOS 13.4.
Demo code (simplified variant of your snapshot):
struct ButtonCard: View {
var body: some View {
VStack {
Image("sea")
.resizable()
.aspectRatio(contentMode: .fill)
.frame(minWidth: 0, maxWidth: .infinity, minHeight: 250, maxHeight: 250, alignment: .center)
.cornerRadius(12)
.contentShape(Rectangle()) // << define clickable rect !!
.clipped()
HStack {
Text("Image #1")
.font(.system(size: 18))
.bold()
.kerning(0.5)
Spacer()
}.allowsHitTesting(false) // << disable label area !!
}
.padding(2)
.border(Color(.systemRed), width: 2)
}
}
struct TestClippedButton: View {
var body: some View {
Button(action: { print(">> tapped") }) {
ButtonCard()
}.buttonStyle(PlainButtonStyle())
}
}

Center View horizontally in SwiftUI

How can I center horizontally a View (Image) in an HStack? I want a button to be left aligned and the image to be centered horizontally the view.
Currently I have this structure:
VStack {
HStack {
Button(action: {
print("Tapped")
}, label: {
Image("left-arrow")
.resizable()
.frame(width: 30, height: 30, alignment: .leading)
}).padding(.leading, 20)
Spacer()
Image("twitter-logo")
.resizable()
.frame(width: 30, height: 30, alignment: .center)
}
Spacer()
}
Which is giving me this:
But I want to achieve this:
You can embed two HStack's in a ZStack and place spacers accordingly for the horizontal spacing. Embed all that in a VStack with a Spacer() to have everything pushed up to the top.
struct ContentView : View {
var buttonSize: Length = 30
var body: some View {
VStack {
ZStack {
HStack {
Button(action: {
}, label: {
Image(systemName: "star")
.resizable()
.frame(width: CGFloat(30), height: CGFloat(30), alignment: .leading)
}).padding(.leading, CGFloat(20))
Spacer()
}
HStack {
Image(systemName: "star")
.resizable()
.frame(width: CGFloat(30), height: CGFloat(30), alignment: .center)
}
}
Spacer()
}
}
}
Note: In the second HStack, the image should automatically be center aligned, but if it isn't, you can place a Spacer() before and after the image.
Edit: Added the VStack and Spacer() to move everything to the top like the OP wanted.
Edit 2: Removed padding on image because it caused the image to be slightly offset from the center. Since it is in its own HStack and center-aligned, it does not need padding.
Edit 3: Thanks to #Chris Prince in the comments, I decided to make a simple NavigationBar-esque custom view that you can provide left, center, and right arguments to create the effect that the OP desired (where each set of views are aligned independently of each other):
struct CustomNavBar<Left, Center, Right>: View where Left: View, Center: View, Right: View {
let left: () -> Left
let center: () -> Center
let right: () -> Right
init(#ViewBuilder left: #escaping () -> Left, #ViewBuilder center: #escaping () -> Center, #ViewBuilder right: #escaping () -> Right) {
self.left = left
self.center = center
self.right = right
}
var body: some View {
ZStack {
HStack {
left()
Spacer()
}
center()
HStack {
Spacer()
right()
}
}
}
}
Usage:
struct ContentView: View {
let buttonSize: CGFloat = 30
var body: some View {
VStack {
CustomNavBar(left: {
Button(action: {
print("Tapped")
}, label: {
Image(systemName: "star")
.resizable()
.frame(width: self.buttonSize, height: self.buttonSize, alignment: .leading)
}).padding()
}, center: {
Image(systemName: "star")
.resizable()
.frame(width: 30, height: 30, alignment: .center)
}, right: {
HStack {
Text("Long text here")
Image(systemName: "star")
.resizable()
.frame(width: 30, height: 30, alignment: .center)
.padding(.trailing)
}.foregroundColor(.red)
})
Spacer()
Text("Normal Content")
Spacer()
}
}
}
What's about saving button size to a property and add a negative padding to the image? And pay attention to an additional spacer after the image.
struct ContentView: View {
var buttonSize: Length = 30
var body: some View {
VStack {
HStack {
Button(action: {
print("Tapped")
}, label: {
Image(systemName: "star")
.resizable()
.frame(width: buttonSize, height: buttonSize, alignment: .leading)
})
Spacer()
Image(systemName: "star")
.resizable()
.frame(width: 30, height: 30, alignment: .center)
.padding(.leading, -buttonSize)
Spacer()
}
Spacer()
}
}
}
The result:
Easiest way for me:
ZStack(){
HStack{
Image("star").resizable().foregroundColor(.white).frame(width: 50, height: 50)
Spacer()
}
Image("star").resizable().font(.title).foregroundColor(.white).frame(width: 50, height: 50)
}
You center the view using position property try this code
Group{ // container View
Image("twitter-logo")
.resizable()
.frame(width: 30, height: 30, alignment: .center)
}.position(x: UIScreen.main.bounds.width/2)
the right way to center the Title like navigationbar:
HStack {
Spacer()
.overlay {
HStack {
Image(systemName: "star")
Spacer()
}
}
Text("Title")
Spacer()
.overlay {
HStack {
Spacer()
Image(systemName: "star")
}
}
}
You can place the view that you want to center into a VStack and then set the alignment to center. Make sure that you also set the frame(maxWidth: .infinity) or else it will be centering your view in the VStack but the VStack might not take up the entire width of the screen so you might not get the appearance you are trying to achieve.
To make it even easier, write it as a function that extends the View object
extension View {
func centerInParentView() -> some View {
VStack(alignment: .center) {
self
}
.frame(maxWidth: .infinity)
}
}
And then you can just call it as you would a view modifier i.e.
VStack {
HStack {
Button(action: {
print("Tapped")
}, label: {
Image("left-arrow")
.resizable()
.frame(width: 30, height: 30, alignment: .leading)
}).padding(.leading, 20)
Spacer()
Image("twitter-logo")
.resizable()
.frame(width: 30, height: 30, alignment: .center)
}
Spacer()
}
.centerInParentView()
Works every time for me
I have got an alternative solution. I used a hidden Image as placeholder.
HStack {
Image("left-arrow").padding()
Spacer()
Image("twitter-logo")
Spacer()
// placeholder to keep layout symmetric
Image("left-arrow").padding().hidden()
}
Of course you can replace the Images with Buttons or other Views as you prefer.
Here is what worked for me
HStack {
Image(systemName: "star.fill")
.frame(maxWidth: .infinity, alignment: .leading)
Image(systemName: "star.fill")
.frame(maxWidth: .infinity, alignment: .center)
Text("")
.frame(maxWidth: .infinity, alignment: .trailing)
}
.foregroundColor(.yellow)
Inspired by SwiftUI - How to align elements in left, center, and right within HStack?
Let me propose a different solution:
https://gist.github.com/buscarini/122516641cd0ee275dd367786ff2a736
It can be used like this:
HStack {
Color.red
.frame(width: 0, height: 50)
.layoutPriority(1)
GlobalHCenteringView {
Text("Hello, world!")
.lineLimit(1)
.background(Color.green)
}
.background(Color.yellow)
Color.red
.frame(width: 180, height: 50)
.layoutPriority(1)
}
}
This will center the child view in the screen if it fits, or leave it as is if it doesn't. It is currently using UIScreen, so it only works on iOS, but you could easily pass the screen or parent width to the constructor of the view, getting it from a GeometryReader or whatever.

SwiftUI view is in the middle instead of in the top

I'm trying to create a view in SwiftUI. In the preview, it looks like it should, but when run on my iPhone (or on the live preview) it looks like it is offset.
I tried to set the padding to -150, but then the TextField doesn't respond to touches.
VStack {
Text("Name:")
.padding(.bottom, 1)
TextField($name)
.padding(.horizontal, 25.0)
.textFieldStyle(.roundedBorder)
.frame(maxWidth: 500)
Text("Image:")
.padding(.top, 1)
Image(uiImage: image!)
.resizable(capInsets: EdgeInsets(), resizingMode: .stretch)
.scaledToFit()
.frame(width: 250, height: 250)
.clipShape(RoundedRectangle(cornerRadius: 10))
.padding(.top, 5)
Button(action: {
withAnimation {
self.showImagePicker = true
}
}) {
Text("Select Image")
.color(.init(red: 20/255, green: 146/255, blue: 81/255))
}
Button(action: {
let list = LSList( title: self.name,
image: self.image!,
id: 0)
list.add()
self.userData.listsData.append(list)
}) {
Text("Add List")
.color(.white)
.font(.system(size: 25))
.bold()
.padding(.horizontal, 7)
.frame(height: 35)
.background(Color.green)
.clipShape(RoundedRectangle(cornerRadius: 3))
}
Spacer()
} .navigationBarTitle(Text("Add List"))
The view in the preview:
The view on my iPhone:
I had the same issue, but found the the problem I had was in using navigationView multiple times.
I thought that we should have NavigationView in every view, but apparently, we should place navigationView only in the main view of the application, and all other views that we enter via navigationLink, automatically get the back option without the need to mention NavigationView again.
So check if you use navigationView more than once in your code.
Strangely, we can specify navigationBarTitle even in views that dont have the navigationView mentioned in them, this is because the navigationView is at the parent view.
Use "displayMode: .inline", to make the navigation area as minimal as possible, it will save you real-estate.
Another thing to do, is to use Spacer().
If you want all your items to be at the top, just put Spacer() as the last item in VStack, and it will push all items to the top.
See this example:
VStack {
// What you care about displaying
Text("Something to Show 1")
Text("Something to Show 2")
Text("Something to Show 3")
// This should be the last, put everything to the top
Spacer()
}
.navigationBarTitle(Text("The Title"), displayMode: .inline)
I had a similar issue, I wanted a VStack to align its content on the top of the screen, and was only using a NavigationView in the parent, but the VStack showed centered. What fixed it for me was using a Spacer(), like this:
VStack(alignment: .leading, spacing: 10){
HStack(alignment: .center, spacing: 5.0) {
...
}
Group{
...
}
Spacer() //<-- This solved my problem
}
Assuming that your VStack is wrapped in a NavigationView, this is the reason it is not rendering correctly in the simulator. The reason it shows fine in preview is that it is not displaying the navigation bar (which includes the back button as well) because the canvas doesn’t know this view might be pushed but in runtime the navigation bar is added while you’re also using an extra NavigationView as well.
To fix it unwrap the VStack from NavigationView and simply remove this NavigationView from the child view.
To make it visible correct with Navigation items in previews(even for child views) you need to wrap the View into the NavigationView { }, because the Canvas is an empty clean environment and it doesn't know that the View may be pushed into the NavigationView
To fix it on iPhone makes sure you are correctly pushing the child view. It should be NavigationButton(destination: AddList()) {}
Example of RowView implementation:
NavigationButton(destination: CarDetail(car: car)) {
HStack {
VStack(alignment: .leading) {
Text(car.name)
Text(car.isAvailable ? "Is Available" : "Out of stock")
.font(.subheadline)
.foregroundColor(.secondary)
}
}
}
ScrollView(.vertical){
VStack {
Text("Name:")
.padding(.bottom, 1)
TextField($name)
.padding(.horizontal, 25.0)
.textFieldStyle(.roundedBorder)
.frame(maxWidth: 500)
Text("Image:")
.padding(.top, 1)
Image(uiImage: image!)
.resizable(capInsets: EdgeInsets(), resizingMode: .stretch)
.scaledToFit()
.frame(width: 250, height: 250)
.clipShape(RoundedRectangle(cornerRadius: 10))
.padding(.top, 5)
Button(action: {
withAnimation {
self.showImagePicker = true
}
}) {
Text("Select Image")
.color(.init(red: 20/255, green: 146/255, blue: 81/255))
}
Button(action: {
let list = LSList( title: self.name,
image: self.image!,
id: 0)
list.add()
self.userData.listsData.append(list)
}) {
Text("Add List")
.color(.white)
.font(.system(size: 25))
.bold()
.padding(.horizontal, 7)
.frame(height: 35)
.background(Color.green)
.clipShape(RoundedRectangle(cornerRadius: 3))
}
Spacer()
} .navigationBarTitle(Text("Add List"))
}

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