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| Create the User Interface with SwiftUI | Coursera Meta |
In this course, learners will discover how to construct effective and intuitive user interfaces for iOS utilizing Swift and various UI frameworks. By the conclusion of this course, you’ll be able to apply diverse techniques for building UIs with Swift, design a basic UI using the Swift Interface Builder, manage UI views with the UIKit framework, develop simple applications using UIKit, create interfaces with the SwiftUI framework, and use lists and forms in SwiftUI for framework development. You will also learn to structure UI with containers, design attractive UIs using advanced views, and enhance views with transformations, drawings, and animations. You'll gain proficiency with tools and software such as the Swift UI framework, interface design software, UIKit features for application and view development, lists and forms creation, and tools for UI transformation, drawing, and animation. To enroll in this course, you should have a basic understanding of Swift and cross-platform mobile application development. Additionally, having a positive attitude will always be beneficial!
Notice!
Always refer to the module on your for the most accurate and up-to-date information.
Module quiz: Getting Started with SwiftUI
1. Which is correct for how SwiftUI deals with user interfaces on different
devices?
- SwiftUI will render the same user interface for all devices and screen sizes.
- Mobile devices have smaller interfaces compared to larger devices. Once you have created the elements you want to display, SwiftUI will decide how to display them.
2. Which of these statements is correct?
- The button size is irrelevant. The only thing that we have to take into consideration is to make clear what the button will accomplish.
- Buttons for a touch interface must be larger than their counterparts for an interface controller by a mouse because fingers are big controller devices compared to a mouse pointer.
- Buttons must follow color consistency. If you add a button to an app, with the text "Are you sure you want to delete this element" in red with white text and later you add a similar button in green with white text, you are breaking consistency.
3. Which of the following statements about Xcode are correct?
- Xcode is an app that allows the development of apps for all Apple platforms.
- Xcode offers code editing and debugging but does not offer a way to preview interfaces as you build.
- Xcode provides a SwiftUI preview that is quite powerful and shows live views of the interface as you build.
4. Which is correct about SwiftUI?
- SwiftUI comes to replace UIKit as a way to create user interfaces.
- SwiftUI requires you to type more code compared to UIKit.
- SwiftUI provides ways to create fast app development.
5. Which of the statements are true about Declarative, and Imperative
syntaxes?
- Imperative Syntax forces you to describe exactly how you want an interface item to be created.
- Declarative Syntax lets you specify what you want to be created and the system decides how to do it.
- Declarative Syntax forces you to describe exactly how you want an interface item to be created.
6. Which of the statements are true about SwiftUI syntax?
- SwiftUI uses Declarative Syntax.
- In SwiftUI every view is a struct.
- SwiftUI uses Imperative Syntax.
7. What does a TextField need to operate correctly in SwiftUI?
- A TextField needs a controlling variable of type @State to store and read values from.
- A TextField works on its own and provides the typing text inside a closure.
8. When connected to a @State variable, a TextField stores input in this
variable and updates its values if the variable changes.
- False
- True
9. Which one represents the correct syntax for a @State variable?
- @State inputVariable: String = ""
- @State var inputVariable = ""
- @State var inputVariable: String = ""
10. Which do you need to do to pass a @State variable to another view?
- We need to set up the receiving view with a @Binding.
- Nothing. @State variables are ready to be shared with another view and there is no additional code needed.
Module quiz: SwiftUI foundations
1. Which of the statements below are true for Stacks?
- Stacks are not scrollable.
- ZStacks allows you to create grid configurations by combining HStacks and VStacks.
2. Which of the below statements is true for Stacks?
- Stacks will always expand to use all space they can, horizontally and vertically.
- Stacks will just use the minimum space required to accommodate the items.
3. What should you have to do to make a Stack scrollable?
- Wrap it inside a ZStack.
- Wrap it inside a ScrollView.
4. You can expand a VStack or HStack by defining its frame size.
- False
- True
5. Images will always be rendered using their natural size unless specified
otherwise.
- True
- False
6. Which of the below statements are true about System Images?
- System Images is the term XCode uses for emojis.
- System Images are also known as SF Symbols.
- System Images are part of XCode.
7. System Images can be appended to regular text.
- False
- True
8. A view can be reused by placing it in another view.
- False
- True
9. If you wanted to allow a view to control a variable defined in the parent
view, which method would you use?
- Mark the variable with @State on the parent view and with @Binding on the secondary view.
- Nothing special is required to make this work in SwiftUI.
10. Which of the below statements is true for @State variables?
- The @Binding variable on the secondary view must have the same name as the @State variable defined on the parent view.
- @Binding and @State variables do not need to have the same name.
Module quiz: Advanced SwiftUI
1. Which of the following is the correct method for how SwiftUI creates
Hierarchical Navigation systems?
- Hierarchical Navigation can be created in SwiftUI by using the keywords navigationLink and navigationView.
- SwiftUI will render the same user hierarchical interface for all devices and screen sizes regardless of any particular code.
2. Which of these statements is correct?
- Flat Navigation systems are the ones where all screens are within reach and can be derived from the starting screen.
- The Hierarchical Navigation, on the other hand, has multiple options inside the other. Imagine a list of products that shows details about every item, on a new view, once an item is selected.
- NavigationLink is a special kind of element that is tappable, like a button.
3. What are the main differences between Scrollview and List?
- Scrollview displays elements as they are, with barely any formatting.
- ScrollView and List are static whose date cannot be changed.
- By default, ScrollView and List displays elements in a vertical orientation.
4. Which is correct about SwiftUI?
- SwiftUI requires you to type more code compared to UIKit.
- SwiftUI provides ways to create fast app development.
- SwiftUI comes to replace UIKit as a way to create user interfaces.
5. Which of the following statements and / or code accurately displays or
describes a gesture?
-
Text("Hello, World!")
.onGesture {
print("Long press Detected on the Text element!")
} - A Gesture is an element that can be attached to a view and detect interactions from taps, clicks and swipes to fine-grained gestures.
-
Text("Hello, World!")
.onTapGesture {
print("Text Tapped!")
}
6. What is the following error code an example of?
Referencing initializer init(_:content:) on ForEach requires that String conform to Identifiable.
- In SwiftUI, every view is a struct.
- This is not a real error code.
- This happens because the elements in a ForEach loop that is processing cannot be distinguished from one other. (Every element must be unique in SwiftUI).
7. A List or Scrollview have a ten element limit.
- False
- True
8. The DragGesture allows you to drag a view around. It is a little bit more
complex because it requires a variable for controlling the view's
position.
- False
- True
9. Which of the following is the correct parameter for the modifier
onLongPressGesture?
- onPressingChanged
- maximumDistancePressed
- minimumDuration
10. If you intend to detect long presses, what can you simply replace
onTapGesture with?
- onLongPressGesture
- Nothing.
Final graded quiz: Create the User Interface
1. Button size and color consistency are two of the key elements for
designing a successful application. How are button size and color
consistency specified in SwiftUI?
- SwiftUI uses Declarative Syntax and the system will always decide how the interface will show.
- You always have to specify the size of buttons and the color consistency for your app.
- SwiftUI uses Imperative Syntax and the system will always decide how the interface will display.
2. What is Imperative Syntax?
- It Is the programming methodology where you have to declare exactly how you want elements to be created.
- it is the kind of programming where views are structures, instead of being instances of classes.
- it is the kind of programming where you declare all variables at the beginning of classes and views.
3. What is Xcode?
- Xcode is a debugger you can use to remove bugs from your code.
- Xcode is an app used to create apps.
- Xcode is just a compiler you invoke from macOS terminal to convert your code into binary that is understood by the processors used in the diverse Apple devices.
4. Which of the below statements are true about stacks?
- Stacks can only be used to create vertical groups of elements.
- Stacks can be of 3 types: VStack, HStack and ZStack.
- Stacks can only be used to create horizontal groups of elements.
5. What is true about Hierarchical navigation?
- Hierarchical navigations are created by NavigationViews and NavigationLinks.
- Hierarchical navigations are created by regular links.
- Hierarchical navigation is the same as Flat Navigation.
6. Flat Navigation must be chosen for complex navigation.
- Complex navigation will be made simpler by using Flat Navigation.
- It is always the best choice for complex navigation.
- You should choose Hierarchical Navigation for complex navigation.
7. Is this code correct?
NavigationLink(destination: Text("Confirm reservation")) {ReservationView()}
- No
- Yes
8. What is true about DragGesture?
- It is the gesture to use if you want to make a view rotate.
- It is used in conjunction with the TapGesture to move a view.
- It is the gesture you use to make a view move.
9. What is true about onChanged?
- It is a modifier used to detect tap gestures with TapGesture.
- It is a modifier used to detect long press gestures.
- It is the closure triggered when a tap gesture is detected.
10. The offset modifier is used in conjunction with the TapGesture to move a
view around.
- No, the offset modifier does not need a gesture to move a view.
- No, TapModifier is used alone to move a view. Nothing else is required.
- Yes, the offset modifier is used in conjunction with the TapGesture to move a view around.