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The code for an iOS toolbar that animates up and down with a button touch or pan gesture.
#import "ViewController.h"
@interface ViewController ()
@property (nonatomic, weak) IBOutlet UIView *toolbarContainer;
@property (nonatomic, weak) IBOutlet UIView *touchZone;
@property (nonatomic, weak) IBOutlet UIView *buttonContainer;
@property (nonatomic, weak) IBOutlet UIButton *collapseButton;
@property (nonatomic, assign) BOOL toolbarIsOpen;
@property (nonatomic, assign) BOOL toolbarIsAnimating;
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.toolbarIsOpen = YES;
self.toolbarIsAnimating = NO;
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(moveToolbar:)];
[self.touchZone addGestureRecognizer:panGesture];
}
- (IBAction)expandCollapseButtonTouched
{
[self buttonTouchEnded];
if (!self.toolbarIsAnimating) {
self.toolbarIsAnimating = YES;
if (self.toolbarIsOpen) {
[self collapseToolbar];
} else {
[self expandToolbar];
}
}
}
- (void)collapseToolbar
{
[UIView animateWithDuration:0.25 animations:^{
[self.toolbarContainer setFrame:CGRectMake(0, (self.view.frame.size.height - 100), self.view.frame.size.width, 100.0)];
} completion:^(BOOL finished) {
[self collapseToolbarWithoutBounce];
}];
}
- (void)collapseToolbarWithoutBounce
{
[UIView animateWithDuration:0.25 animations:^{
[self.toolbarContainer setFrame:CGRectMake(0, (self.view.frame.size.height - 35), self.view.frame.size.width, 100.0)];
} completion:^(BOOL finished) {
self.toolbarIsOpen = NO;
self.toolbarIsAnimating = NO;
[self.collapseButton setTitle:@"\u2B06" forState:UIControlStateNormal];
}];
}
- (void)expandToolbar
{
[UIView animateWithDuration:0.25 animations:^{
[self.toolbarContainer setFrame:CGRectMake(0, (self.view.frame.size.height - 100), self.view.frame.size.width, 100.0)];
} completion:^(BOOL finished) {
[self expandToolbarWithoutBounce];
}];
}
- (void)expandToolbarWithoutBounce
{
[UIView animateWithDuration:0.25 animations:^{
[self.toolbarContainer setFrame:CGRectMake(0, (self.view.frame.size.height - 90), self.view.frame.size.width, 100.0)];
} completion:^(BOOL finished) {
self.toolbarIsOpen = YES;
self.toolbarIsAnimating = NO;
[self.collapseButton setTitle:@"\u2B07" forState:UIControlStateNormal];
}];
}
- (void)moveToolbar:(UIPanGestureRecognizer *)panGesture
{
CGPoint translatedPoint = [panGesture translationInView:self.toolbarContainer];
if ([panGesture state] == UIGestureRecognizerStateBegan) {
self.buttonContainer.backgroundColor = [UIColor colorWithRed:0.56 green:0.27 blue:0 alpha:1.0];
self.touchZone.backgroundColor = [UIColor colorWithRed:0.56 green:0.27 blue:0 alpha:1.0];
}
if ([panGesture state] == UIGestureRecognizerStateChanged) {
float newYOrigin = self.toolbarContainer.frame.origin.y + translatedPoint.y;
if ((newYOrigin > (self.view.frame.size.height - 100)) && (newYOrigin < (self.view.frame.size.height - 35))) {
self.toolbarContainer.center = CGPointMake(self.toolbarContainer.center.x, self.toolbarContainer.center.y + translatedPoint.y);
}
[panGesture setTranslation:CGPointMake(0, 0) inView:self.toolbarContainer];
}
if ([panGesture state] == UIGestureRecognizerStateEnded) {
self.buttonContainer.backgroundColor = [UIColor colorWithRed:1.0 green:(128.0/255.0) blue:0 alpha:1.0];
self.touchZone.backgroundColor = [UIColor colorWithRed:1.0 green:(128.0/255.0) blue:0 alpha:1.0];
self.toolbarIsAnimating = YES;
if (self.toolbarContainer.frame.origin.y < (self.view.frame.size.height - 65)) {
[self expandToolbarWithoutBounce];
} else {
[self collapseToolbarWithoutBounce];
}
}
}
#pragma mark - Collapse Button Actions
- (IBAction)buttonTouchBegin
{
self.buttonContainer.backgroundColor = [UIColor colorWithRed:0.56 green:0.27 blue:0 alpha:1.0];
self.touchZone.backgroundColor = [UIColor colorWithRed:0.56 green:0.27 blue:0 alpha:1.0];
}
- (void)buttonTouchEnded
{
self.buttonContainer.backgroundColor = [UIColor colorWithRed:1.0 green:(128.0/255.0) blue:0 alpha:1.0];
self.touchZone.backgroundColor = [UIColor colorWithRed:1.0 green:(128.0/255.0) blue:0 alpha:1.0];
}
@end
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