Eric Jensen
141 lines
4.7 KiB
Objective-C
141 lines
4.7 KiB
Objective-C
/**
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Copyright (c) 2014-present, Facebook, Inc.
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All rights reserved.
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This source code is licensed under the BSD-style license found in the
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LICENSE file in the root directory of this source tree. An additional grant
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of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "ViewController.h"
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#import <FBShimmering/FBShimmeringView.h>
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@interface ViewController ()
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@end
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@implementation ViewController
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{
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UIImageView *_wallpaperView;
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FBShimmeringView *_shimmeringView;
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UILabel *_logoLabel;
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UILabel *_valueLabel;
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CGFloat _panStartValue;
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BOOL _panVertical;
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}
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- (BOOL)prefersStatusBarHidden
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{
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return YES;
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}
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- (void)viewDidLoad
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{
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[super viewDidLoad];
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self.view.backgroundColor = [UIColor blackColor];
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_wallpaperView = [[UIImageView alloc] initWithFrame:self.view.bounds];
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_wallpaperView.image = [UIImage imageNamed:@"Wallpaper"];
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_wallpaperView.contentMode = UIViewContentModeScaleAspectFill;
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[self.view addSubview:_wallpaperView];
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CGRect valueFrame = self.view.bounds;
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valueFrame.size.height = valueFrame.size.height * 0.25;
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_valueLabel = [[UILabel alloc] initWithFrame:valueFrame];
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_valueLabel.font = [UIFont fontWithName:@"HelveticaNeue-UltraLight" size:32.0];
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_valueLabel.textColor = [UIColor whiteColor];
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_valueLabel.textAlignment = NSTextAlignmentCenter;
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_valueLabel.numberOfLines = 0;
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_valueLabel.alpha = 0.0;
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_valueLabel.backgroundColor = [UIColor clearColor];
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[self.view addSubview:_valueLabel];
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_shimmeringView = [[FBShimmeringView alloc] init];
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_shimmeringView.shimmering = YES;
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_shimmeringView.shimmeringBeginFadeDuration = 0.3;
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_shimmeringView.shimmeringOpacity = 0.3;
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[self.view addSubview:_shimmeringView];
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_logoLabel = [[UILabel alloc] initWithFrame:_shimmeringView.bounds];
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_logoLabel.text = @"Shimmer";
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_logoLabel.font = [UIFont fontWithName:@"HelveticaNeue-UltraLight" size:60.0];
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_logoLabel.textColor = [UIColor whiteColor];
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_logoLabel.textAlignment = NSTextAlignmentCenter;
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_logoLabel.backgroundColor = [UIColor clearColor];
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_shimmeringView.contentView = _logoLabel;
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UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(_tapped:)];
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[self.view addGestureRecognizer:tapRecognizer];
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UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(_panned:)];
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[self.view addGestureRecognizer:panRecognizer];
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}
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- (void)viewWillLayoutSubviews
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{
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[super viewWillLayoutSubviews];
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CGRect shimmeringFrame = self.view.bounds;
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shimmeringFrame.origin.y = shimmeringFrame.size.height * 0.68;
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shimmeringFrame.size.height = shimmeringFrame.size.height * 0.32;
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_shimmeringView.frame = shimmeringFrame;
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}
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- (void)_tapped:(UITapGestureRecognizer *)tapRecognizer
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{
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_shimmeringView.shimmering = !_shimmeringView.shimmering;
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}
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- (void)_panned:(UIPanGestureRecognizer *)panRecognizer
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{
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CGPoint translation = [panRecognizer translationInView:self.view];
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CGPoint velocity = [panRecognizer velocityInView:self.view];
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if (panRecognizer.state == UIGestureRecognizerStateBegan) {
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#if CGFLOAT_IS_DOUBLE
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_panVertical = (fabs(velocity.y) > fabs(velocity.x));
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#else
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_panVertical = (fabsf(velocity.y) > fabsf(velocity.x));
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#endif
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if (_panVertical) {
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_panStartValue = _shimmeringView.shimmeringSpeed;
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} else {
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_panStartValue = _shimmeringView.shimmeringOpacity;
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}
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[self _animateValueLabelVisible:YES];
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} else if (panRecognizer.state == UIGestureRecognizerStateChanged) {
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CGFloat directional = (_panVertical ? translation.y : translation.x);
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CGFloat possible = (_panVertical ? self.view.bounds.size.height : self.view.bounds.size.width);
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CGFloat progress = (directional / possible);
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if (_panVertical) {
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_shimmeringView.shimmeringSpeed = fmaxf(0.0, fminf(1000.0, _panStartValue + progress * 200.0));
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_valueLabel.text = [NSString stringWithFormat:@"Speed\n%.1f", _shimmeringView.shimmeringSpeed];
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} else {
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_shimmeringView.shimmeringOpacity = fmaxf(0.0, fminf(1.0, _panStartValue + progress * 0.5));
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_valueLabel.text = [NSString stringWithFormat:@"Opacity\n%.2f", _shimmeringView.shimmeringOpacity];
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}
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} else if (panRecognizer.state == UIGestureRecognizerStateEnded ||
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panRecognizer.state == UIGestureRecognizerStateCancelled) {
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[self _animateValueLabelVisible:NO];
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}
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}
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- (void)_animateValueLabelVisible:(BOOL)visible
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{
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UIViewAnimationOptions options = UIViewAnimationOptionBeginFromCurrentState;
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void (^animations)() = ^{
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_valueLabel.alpha = (visible ? 1.0 : 0.0);
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};
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[UIView animateWithDuration:0.5 delay:0.0 options:options animations:animations completion:NULL];
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}
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@end
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