/* |
File: RootViewController.m |
Abstract: The application's root view controller. |
Version: 1.7 |
|
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The Apple Software is provided by Apple on an "AS IS" basis. APPLE |
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Copyright (C) 2013 Apple Inc. All Rights Reserved. |
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*/ |
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#import "RootViewController.h" |
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@interface RootViewController () |
/// Things for IB |
@property (nonatomic, weak) IBOutlet UISlider *redSlider; |
@property (nonatomic, weak) IBOutlet UISlider *greenSlider; |
@property (nonatomic, weak) IBOutlet UISlider *blueSlider; |
@property (nonatomic, weak) IBOutlet UITextView *urlField; |
@property (nonatomic, weak) IBOutlet UIView *colorView; |
@end |
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@implementation RootViewController |
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// ------------------------------------------------------------------------------- |
// updateWithColor: |
// Update the interface to display aColor. This includes modifying colorView |
// to show aColor, moving the red, green, and blue sliders to match the R, G, and |
// B components of aColor, and updating urlLabel to display the corresponding |
// URL for aColor. |
// ------------------------------------------------------------------------------- |
- (void)updateWithColor:(UIColor*)aColor |
{ |
// There is a possibility that -getRed:green:blue:alpha: could fail if aColor |
// is not in a compatible color space. In such a case, the arguments are not |
// modified. Having default values will allow for a more graceful failure |
// than picking up whatever is currently on the stack. |
CGFloat red = 0.0f; |
CGFloat green = 0.0f; |
CGFloat blue = 0.0f; |
CGFloat alpha = 0.0f; |
|
if ([aColor getRed:&red green:&green blue:&blue alpha:&alpha] == NO) |
{ |
// While setting default values for red, green, blue and alpha |
// guards against undefined results if -getRed:green:blue:alpha: |
// fails, aColor will be assigned as the backgroundColor of |
// colorView a few lines down. Initialize aColor to the black |
// color so it matches the color code that will be displayed in |
// the urlLabel. |
aColor = [UIColor blackColor]; |
} |
|
self.redSlider.value = red; |
self.greenSlider.value = green; |
self.blueSlider.value = blue; |
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self.colorView.backgroundColor = aColor; |
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// Construct the URL for the specified color. This URL allows another app |
// to start LauncMe with the specific color displayed initially. |
self.urlField.text = [NSString stringWithFormat:@"launchme:#%.2x%.2x%.2x", |
(unsigned char)(red * 255), |
(unsigned char)(green * 255), |
(unsigned char)(blue * 255)]; |
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self.urlFieldHeader.text = @"Tap to select the URL"; |
} |
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// ------------------------------------------------------------------------------- |
// setSelectedColor: |
// Custom implementation of the setter for the selectedColor property. |
// ------------------------------------------------------------------------------- |
- (void)setSelectedColor:(UIColor *)selectedColor |
{ |
if (selectedColor != _selectedColor) |
{ |
_selectedColor = selectedColor; |
[self updateWithColor:_selectedColor]; |
} |
} |
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#pragma mark - View Lifecycle |
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// ------------------------------------------------------------------------------- |
// viewDidLoad |
// ------------------------------------------------------------------------------- |
- (void)viewDidLoad |
{ |
[super viewDidLoad]; |
|
// The AppDelegate may have assigned a color to selectedColor that should |
// be the color displayed initially. This would have occurred before the |
// view was actually loaded meaning that while -updateWithColor was executed, |
// it had no effect. The solution is to call it again here now that there is |
// a UI to update. |
[self updateWithColor:_selectedColor]; |
} |
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#pragma mark - Rotation |
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#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_6_0 |
// ------------------------------------------------------------------------------- |
// shouldAutorotateToInterfaceOrientation: |
// Disable rotation on iOS 5.x and earlier. Note, for iOS 6.0 and later all you |
// need is "UISupportedInterfaceOrientations" defined in your Info.plist |
// ------------------------------------------------------------------------------- |
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation |
{ |
return (interfaceOrientation == UIInterfaceOrientationPortrait); |
} |
#endif |
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#pragma mark - Actions |
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// ------------------------------------------------------------------------------- |
// touchesEnded:withEvent: |
// Deselects the text in the urlField if the user taps in the white space |
// of this view controller's view. |
// ------------------------------------------------------------------------------- |
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event |
{ |
self.urlField.selectedRange = NSMakeRange(0, 0); |
} |
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// ------------------------------------------------------------------------------- |
// urlFieldWasTapped: |
// IBAction for the tap gesture recognizer defined in this view controller's |
// scene in the storyboard. Selects the text displayed in the urlField. |
// ------------------------------------------------------------------------------- |
- (IBAction)urlFieldWasTapped:(id)sender |
{ |
[self.urlField selectAll:self]; |
} |
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// ------------------------------------------------------------------------------- |
// sliderValueDidChange: |
// IBAction for all three sliders. |
// ------------------------------------------------------------------------------- |
- (IBAction)sliderValueDidChange:(id)sender |
{ |
// Create a new UIColor object with the current value of all three sliders |
// (it does not matter which one was actualy modified). Assign it |
// as the new selectedColor. The override of the setter for selectedColor |
// will handle updating the UI. |
self.selectedColor = [UIColor colorWithRed:self.redSlider.value |
green:self.greenSlider.value |
blue:self.blueSlider.value |
alpha:1.0f]; |
} |
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// ------------------------------------------------------------------------------- |
// startMobileSafari: |
// IBAction for the Launch Mobile Safari button. |
// ------------------------------------------------------------------------------- |
- (IBAction)startMobileSafari:(id)sender |
{ |
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.apple.com"]]; |
} |
|
@end |
