EMTLoadingIndicator

Displays loading indicator on Apple watchOS 4+

Installation

Simply add class and resource files to your project, or use CocoaPods or Carthage.

Podfile

use_frameworks!
target :'SomeWatchKitApp Extension', :exclusive => true do
	platform :watchos, '4.0'
    pod 'EMTLoadingIndicator', '~> 4.0.0'
end

Carthage

carthage update --platform watchOS

Usage

Initialization

private var indicator: EMTLoadingIndicator?

override func willActivate() {

    indicator = EMTLoadingIndicator(interfaceController: self, interfaceImage: image!,
        width: 40, height: 40, style: .line)

width and height are the size of WKInterfaceImage passed to 2nd argument. Indicator images will be created with this size. Style argument decides the visual of wait (loop) indicator - Dot or Line.

Dot Indicator

indicator = EMTLoadingIndicator(interfaceController: self, interfaceImage: image!,
    width: 40, height: 40, style: .dot)

// prepareImageForWait will be called automatically in the showWait method at the first time.
// It takes a bit of time. You can call it manually if necessary.
indicator?.prepareImagesForWait()

// show
indicator?.showWait()

// hide
indicator?.hide()

*Images of Dot indicator are static resource files size of 80px x 80px. These PNG files are created with Flash CC (waitIndicatorGraphic.fla).

Line (Circular) Indicator

indicator = EMTLoadingIndicator(interfaceController: self, interfaceImage: image!,
    width: 40, height: 40, style: .line)
indicator?.showWait()
indicator?.hide()

Progress Indicator

indicator?.prepareImagesForProgress()

// You can set start percentage other than 0.
indicator?.showProgress(startPercentage: 0)

// Update progress percentage with animation
indicator?.updateProgress(percentage: 75)

indicator?.hide()

Reload Icon

You can display static reload icon (in some loading error situations).

indicator?.showReload()

Styling

If you want to change styles, you need to set properties before using prepare/show methods.

// defaults
EMTLoadingIndicator.circleLineColor = UIColor(white: 1, alpha: 0.8)
EMTLoadingIndicator.circleLineWidth = 1
EMTLoadingIndicator.progressLineColorOuter = UIColor(white: 1, alpha: 0.28)
EMTLoadingIndicator.progressLineColorInner = UIColor(white: 1, alpha: 0.70)
EMTLoadingIndicator.progressLineWidthOuter = 1
EMTLoadingIndicator.progressLineWidthInner = 2
EMTLoadingIndicator.reloadColor = UIColor.white
EMTLoadingIndicator.reloadLineWidth = 4
EMTLoadingIndicator.reloadArrowRatio = 3

Clear Images

All created images are stored in static properties and used for all instances. If you want to clear them, use following methods.

indicator?.clearWaitImage()
indicator?.clearReloadImage()
indicator?.clearProgressImage()

Requirements

• watchOS 3.0+

License

EMTLoadingIndicator is available under the MIT license. See the LICENSE file for more info.