/* |
File: MyViewController.m |
Abstract: The main view controller of this app. |
Version: 1.1 |
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*/ |
#import "MyViewController.h" |
#import "HoverView.h" |
NSString *Show_HoverView = @"SHOW"; |
@implementation MyViewController |
@synthesize hoverView, leftButton, rightButton; |
- (void)viewDidLoad |
{ |
// determine the size of HoverView |
CGRect frame = hoverView.frame; |
frame.origin.x = round((self.view.frame.size.width - frame.size.width) / 2.0); |
frame.origin.y = self.view.frame.size.height - 100; |
hoverView.frame = frame; |
[self.view addSubview:hoverView]; |
// called by MainView, when the user touches once on the background image |
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showViewNotif:) name:Show_HoverView object:nil]; |
} |
- (void)showHoverView:(BOOL)show |
{ |
// reset the timer |
[myTimer invalidate]; |
[myTimer release]; |
myTimer = nil; |
// fade animate the view out of view by affecting its alpha |
[UIView beginAnimations:nil context:NULL]; |
[UIView setAnimationDuration:0.40]; |
if (show) |
{ |
// as we start the fade effect, start the timeout timer for automatically hiding HoverView |
hoverView.alpha = 1.0; |
myTimer = [[NSTimer timerWithTimeInterval:3.0 target:self selector:@selector(timerFired:) userInfo:nil repeats:NO] retain]; |
[[NSRunLoop currentRunLoop] addTimer:myTimer forMode:NSDefaultRunLoopMode]; |
} |
else |
{ |
hoverView.alpha = 0.0; |
} |
[UIView commitAnimations]; |
} |
- (void)timerFired:(NSTimer *)timer |
{ |
// time has passed, hide the HoverView |
[self showHoverView: NO]; |
} |
- (void)showViewNotif:(NSNotification *)aNotification |
{ |
// start over - reset the timer |
[myTimer invalidate]; |
[myTimer release]; |
myTimer = nil; |
[self showHoverView:(hoverView.alpha != 1.0)]; |
} |
- (void)dealloc |
{ |
[leftButton release]; |
[rightButton release]; |
[hoverView release]; |
[myTimer release]; |
// no longer interested in Show_HoverView notifs |
[[NSNotificationCenter defaultCenter] removeObserver:self name:Show_HoverView object:nil]; |
[super dealloc]; |
} |
- (void)didReceiveMemoryWarning |
{ |
// invoke super's implementation to do the Right Thing, but also release the input controller since we can do that |
// In practice this is unlikely to be used in this application, and it would be of little benefit, |
// but the principle is the important thing |
// |
[super didReceiveMemoryWarning]; |
} |
- (IBAction)leftAction:(id)sender |
{ |
// user touched the left button in HoverView |
[self showHoverView:NO]; |
} |
- (IBAction)rightAction:(id)sender |
{ |
// user touched the right button in HoverView |
[self showHoverView:NO]; |
} |
@end |
Last updated: 2010-06-24