To add this component to your Xcode project using CocoaPods, add the following to your Podfile
:
pod 'MaterialComponents/ProgressView'
Then, run the following command:
$ pod install
This progress view provides an animation effect when showing and hidding it: it grows up (resp. shrinks down). Additionally, all animated changes APIs take an optional completion block, to synchronize multistep animations.
Before using Progress View, you'll need to import it:
import MaterialComponents.MaterialProgressView
#import "MaterialProgressView.h"
Add the progress view to your view hierarchy like you would with any other view. Note that it works best when the progress view is added at the bottom of a view, as showing (resp. hiding) grows up (resp. shrinks down).
Add the progress view to a view and set the desired progress and hidden state.
let progressView = MDCProgressView() progressView.progress = 0 let progressViewHeight = CGFloat(2) progressView.frame = CGRect(x: 0, y: view.bounds.height - progressViewHeight, width: view.bounds.width, height: progressViewHeight) view.addSubview(progressView)
@property(nonatomic) MDCProgressView *progressView; ... // Progress view configuration. self.progressView = [[MDCProgressView alloc] initWithFrame:myframe]; self.progressView.progress = 0; // You can also set a greater progress for actions already started. [self.view addSubview:self.progressView];
Both the progress and the hidden state can be animated, with a completion block.
func startAndShowProgressView() { progressView.progress = 0 progressView.setHidden(false, animated: true) } func completeAndHideProgressView() { progressView.setProgress(1, animated: true) { (finished) in self.progressView.setHidden(true, animated: true) } }
- (void)startAndShowProgressView { self.progressView.progress = 0; [self.progressView setHidden:NO animated:YES completion:nil]; } - (void)completeAndHideProgressView { __weak __typeof__(self) weakSelf = self; [self.progressView setProgress:1 animated:YES completion:^(BOOL finished){ [weakSelf.progressView setHidden:YES animated:YES completion:nil]; }]; }