Introduction to iOS 16 Photos Picker in Swift UI

• iOS 16 introduces a native Photos Picker in Swift UI.
• This lecture demonstrates how to select single/multiple images and filter file types.
• Example: Building a profile screen with image selection.

Setting Up Photos Picker

• Import Libraries: Import PhotosUI under SwiftUI.
• Setup UI: Use HStack for avatar image and VStack for name and profession on the profile screen.

Implementing Photos Picker

• Wrapping Image: Wrap the profile image with PhotosPicker to pull up image selection on tap.
• Label Binding: Use the label parameter to customize the button (e.g., Image, Text, SF Symbol).
• Photos Picker Item: Bind selection to @State private var photosPickerItem: PhotosPickerItem?.
  • Converts data, not a fully rendered image, for performance.

Filtering Photos

• Filter Options: Use PHPickerFilter to filter file types (e.g., images, videos).
• Exclude Filter: Example shown to exclude screenshots.

Converting Picker Item to UIImage

• OnChange Modifier: Monitor changes in photosPickerItem.
• Conversion: Convert the selected PhotosPickerItem to UIImage and update the UI.
• Nil Check: Ensure photosPickerItem is not nil before conversion.

Handling Multiple Images

• Array Handling: Change photosPickerItem to array photosPickerItems.
• Max Selection Limit: Limit selections (e.g., max 5 images).
• Ordered Selection: Maintain the order of selection using selectionBehavior: .ordered.

Updating UI for Multiple Images

• Scroll View: Use ScrollView for horizontal scrolling of selected images.
• Images Array: Use @State private var images: [UIImage] = [] to store selected images.
• ForEach Loop: Iterate over images array to display images.

Final Adjustments

• Reset Selection: Set photosPickerItems.removeAll() to clear previous selections.
• UI Customization: Improve UI styling and layout.

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Conclusion

• Successfully demonstrated implementing iOS 16 Photos Picker in Swift UI.
• Highlighted key features: single/multiple image selection, filtering, data conversion.
• Encouragement to use Squarespace for web development to focus on building iOS apps.