iOS 7 SDK特訓班

iOS 7 SDK
彼得潘
•
•
• :App -
iPhone . iPad
•
2012
Top 6
App

APP
Mac
http://www.facebook.com/iphone.peterpan
http://deeploveapple.blogspot.tw
apppeterpan@gmail.com
http://apppeterpan.blogspot.tw
FB
blog
wiki
http://peterpan.uservoice.com
http://deeploveiossdk.tumblr.com
wiki
email

agenda
• iOS 7 SDK
• Xcode 5
• Objective-C Foundation framework
• iOS 6 App iOS 7 (UI )
•
• 1: Motion Effects (3D)
• 2: UIKit Dynamics (2D)
iOS 7 SDK

• UI
•
•
•
• device
•
•
•
•
• device
• App
• JavaScript
• iBeacon
• Machine Readable
Code Detection
• Apple Map
• Safari Reading list
•
UI
• UI
• Button
• nav bar search bar
• blurred background ( )
• image rendering mode (App iOS 7 )
• tint color (App iOS 7 )
• full screen status bar &
navigation bar (App iOS 7 )

UI
button
nav bar search bar
UISearchBar *searchBar = [[UISearchBar alloc] init];
searchController = [[UISearchDisplayController alloc]
initWithSearchBar:searchBar contentsController:self];
searchController.searchResultsDataSource = self;
searchController.searchResultsDelegate = self;
searchController.delegate = self;
searchController.displaysSearchBarInNavigationBar = YES;
searchController.navigationItem.rightBarButtonItem =
[[UIBarButtonItem alloc] initWithTitle:@"Close"
style:UIBarButtonItemStylePlain target:self
action:@selector(close:)];
UISearchDisplayController.h
@property (nonatomic, assign) BOOL
displaysSearchBarInNavigationBar;
UINavigationController UINavigationBar

blurred background
( )
https://developer.apple.com/downloads/index.action
UIImage+ImageEffects
- (UIImage *)applyBlurWithRadius:(CGFloat)blurRadius tintColor:(UIColor *)tintColor
saturationDeltaFactor:(CGFloat)saturationDeltaFactor maskImage:(UIImage
*)maskImage;
UIToolbar
- (void)viewDidLoad
{
[super viewDidLoad];
!
UIScrollView *scrollView = [[UIScrollView alloc]
initWithFrame:CGRectMake(0, 20, 320, 320)];
[self.view addSubview:scrollView];
scrollView.contentSize = CGSizeMake(320, 1000);
UIImageView *imageView = [[UIImageView alloc]
imageView.image = [UIImage imageNamed:@"cute.jpg"];
[scrollView addSubview:imageView];
UIToolbar *toolBar = [[UIToolbar alloc]
[self.view addSubview:toolBar];
}

UIToolbar
UIToolbar *toolBar = [[UIToolbar alloc]
initWithFrame:CGRectMake(0, 20, 320,
44)];
[self.view addSubview:toolBar];
toolBar.barTintColor = [UIColor blueColor];
• view controller
• CollectionView
• interactive transition
• Motion Effects ( )
• UIKit Dynamics ( )

view controller
http://www.doubleencore.com/2013/09/ios-7-custom-transitions
http://www.appdesignvault.com/custom-transition-ios-7
http://blog.bignerdranch.com/3871-golden-opportunity-custom-
transitions/
UIViewControllerAnimatedTransitioning protocol
CollectionView
WWDC 2013 Sample: iOS_CollectionViewTransition
ex: App YearsView Collections zoom in
https://developer.apple.com/downloads/index.action?name=WWDC%202013

interactive transition
• controller
• ex: scroll
UIViewControllerInteractiveTransitioning
Multitasking Enhancements
• (Background Fetch)
• ( Remote Notiﬁcation )
silent push
( )

Text Kit
Letterpress ( )
Letterpress Letterpress

letterpress
UILabel *label = [[UILabel alloc]
label.font = [UIFont systemFontOfSize:150];
label.textAlignment = NSTextAlignmentCenter;
NSDictionary *attrDic =
@{NSForegroundColorAttributeName : [UIColor
colorWithRed:0 green:0 blue:1 alpha:0.5],
NSTextEffectAttributeName :
NSTextEffectLetterpressStyle};
NSAttributedString *attrString = [[NSAttributedString
alloc] initWithString:@" " attributes:attrDic];
label.attributedText = attrString;
[self.view addSubview:label];
NSAttributedString.h
UIKIT_EXTERN NSString *const NSTextEffectLetterpressStyle
NS_AVAILABLE_IOS(7_0);
Exclusion paths

Exclusion paths
UITextView *textView = [[UITextView alloc]
textView.backgroundColor = [UIColor clearColor];
textView.textColor = [UIColor whiteColor];
textView.text = @"
";
textView.font = [UIFont systemFontOfSize:28];
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(10.0, 40.0)];
[path addLineToPoint:CGPointMake(110.0, 140.0)];
[path addLineToPoint:CGPointMake(210, 40)];
[path closePath];
textView.textContainer.exclusionPaths = @[path];
[self.view addSubview:textView];
NSTextContainer.h
@property(copy, NS_NONATOMIC_IOSONLY) NSArray *exclusionPaths;
Text attachments

Text attachments
UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(0,
40, 320, 400)];
textView.backgroundColor = [UIColor clearColor];
NSMutableAttributedString *str = [[NSMutableAttributedString alloc]
initWithString:@"
"];
NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
attachment.image = [UIImage imageNamed:@"shoppingIcon.png"];
[str appendAttributedString:[NSAttributedString
attributedStringWithAttachment:attachment]];
[str appendAttributedString:[[NSMutableAttributedString alloc]
initWithString:@"
"]];
textView.attributedText = str;
[self.view addSubview:textView];
NSTextAttachment.h
@interface NSAttributedString (NSAttributedStringAttachmentConveniences)
// A convenience method for creating an attributed string containing
attachment using NSAttachmentCharacter as the base character.
+ (NSAttributedString *)attributedStringWithAttachment:(NSTextAttachment
*)attachment NS_AVAILABLE_IOS(7_0);
@end
dynamic text size

AirDrop
available on iPhone 5, iPad (4th generation), iPad mini, and iPod touch (5th generation)
requires an iCloud account
:Wiﬁ Bluetooth
AirDrop
• UIActivityViewController
• Share
• NSString & NSAttributedString ( Notes.app )
• UIImage & AVAsset (Photos.app )
• NSURL
• Safari.app
• App

Machine Readable
Code Detection
support barcode
• QR code
• Aztec
• EAN13
• EAN8
• UPC-E
• PDF417
• Code 93
• Code 39
• Code 39 mod 43
AVCaptureMetadataOutput

SSReadingList
Safari Reading list
NSURL *url = [NSURL URLWithString:@"https:/
/www.facebook.com/iphone.peterpan"];
[[SSReadingList defaultReadingList]
addReadingListItemWithURL:url title:@" "
previewText:@" " error:nil];
• CIDetectorSmile
• CIDetectorEyeBlink

Multipeer Connectivity
• device
• :
infrastructure Wi-Fi networks
peer-to-peer Wi-Fi
Bluetooth
Multipeer Connectivity

Inter-App Audio
• App MIDI
• App
iBeacon
bluetooth
beacon : iPhone
CLBeaconRegion

Map Kit
MKOverlayRenderer
overlay

AVSpeechSynthesis
AVSpeechSynthesizer *synthesizer = [[AVSpeechSynthesizer alloc]
init];
AVSpeechUtterance *utterance = [AVSpeechUtterance
speechUtteranceWithString:@" "];
[synthesizer speakUtterance:utterance];
AVSpeechSynthesizer
AVSpeechSynthesizer:
• M7
• 5s support
• CMStepCounter
• typedef void (^CMStepUpdateHandler)(NSInteger
numberOfSteps, NSDate *timestamp, NSError
*error);

Sprite Kit
• OpenGL ES
• library Cocos 2D
• 2D
Game Controller
: Bluetooth

Game Controller
Game Controller

JavaScriptCore
• objective-c javascript
• javascript objective-c
Xcode 5

Xcode 5
• UI
•
• Asset Catalogs
• Image Slicing
•
• App
• Interface Builder Preview
• support 64 bit iOS (iPhone 5s)
•
• App Capability
• Debug Gauges
• XCTest
• Continuous Integration
• Autolayout
• Quick Look
•
Xcode
• OS X Mavericks

template
Asset Catalogs &
Image Slicing
•
•
ex: @2x, ~ipad
•
• App Icon

Preview
/**
sing a song
@code
ViewController controller = [ViewController alloc] init];
[controller singSong:@" 89 "];
@endcode
@see http://www.apple.com for more info
@param song
the song to sing
@return YES if song name lenght > 3
*/
-(BOOL)singSong:(NSString*)song
{
if (song.length > 3)
{
return YES;
}
else
{
return NO;
}
}

IB auto layout
• IB constraint
• constraint
XCTest

Continuous Integration
• build App
• simulator
• OS X Mavericks Server
•
•
• on commit
• periodically
Continuous Integration

Objective-C
Foundation framework
Objective-C
Foundation framework
• module
• instancetype
• NSArray

module
• SDK framework
•
• import
framework

module
: MapKit.framework
module
!

@import
• @import QuartzCore;
• @import QuartzCore.CoreAnimation;
• #import @import
ex:
(1) #import <UIKit/UIKit.h>
@import UIKit;
(2) #import <iAd/ADBannerView.h>
@import iAd.ADBannerView;
• module
#import
enable modules

instancetype
id
NSArray.h
+ (id)array;
NSDictionary *dic = [NSArray array];

instancetype
NSArray.h
+ (instancetype)array;
return type
array
NSArray.h
- (id)ﬁrstObject NS_AVAILABLE(10_6, 4_0);
- (id)lastObject;
ﬁrstObject iOS 7
NSArray *array = [[NSArray alloc] init];
NSLog(@"array %@", array[0]);
NSArray *array = [[NSArray alloc] init];
NSLog(@"array %@", [array firstObject]);
nil

iOS 6 App iOS 7
• App Icon
• Asset Catalogs Image Slicing
• tint color
• iOS
• full screen status bar &
navigation bar
• image render mode
• interactivePopGestureRecognizer
• keyboard , picker & alert view
App Icon size
App Icon (pixel)
iPhone 57 * 57
iPhone Retina 114 * 114
iPad (iPad mini) 72 * 72
iPad Retina 144 * 144
iPhone Retina iOS 7 120 * 120
iPad (iPad mini) iOS 7 76 * 76
iPad Retina iOS 7 152 * 152

iOS 7
Retina
App iPhone App iOS 7
-> retina
size
Launch Image (pixel)
iPhone 3.5 320 * 480
iPhone Retina 3.5 640 * 960
iPhone Retina 4 640 * 1136
iPad (iPad mini) 768 * 1024
1024 * 768
iPad Retina 1536 * 2048
2048 * 1536
full screen status bar

App Icon
asset catalogs Use Asset Catalog
asset catalogs

asset catalogs
image.xcassets AppIcon

iOS AppIcon
attributes inspectorps: Development Target
• support png
•
•
Asset Catalogs
andy.png tony.png
self.imageView.image = [UIImage imageNamed:@"handsome"];

Asset Catalogs
andy.png tony.png chilam.png tai.pnglin.png
Image Slicing

tint color
tint color
• UI
• active UI tab
• UI (ex: UIButton )
• button

UIView tintColor property
• default: blue
• tintColor :
1.
2. superview
tintColor superview
3. superview tintColor
• App
1. UI tint color
2. App tint color
UIView.h
@property(nonatomic,retain) UIColor *tintColor NS_AVAILABLE_IOS(7_0);
view superview tintColor
App tint color
• window tintColor
• storyboard global tint

tint color
self.view.tintColor = [UIColor orangeColor];
iOS 6 Crash
tintColor property iOS 7
iOS
if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_6_1)
{
}
else
{
}
NSObjCRuntime.h
#define NSFoundationVersionNumber_iPhoneOS_2_0!678.24
#define NSFoundationVersionNumber_iPhoneOS_2_1 678.26
#define NSFoundationVersionNumber_iOS_4_0 751.32
iOS SDK: crash
iOS deprecated SDK: do nothing

iOS 6 tintColor
UINavigationBar.h
@property(nonatomic,retain) UIColor *tintColor;
@property(nonatomic,retain) UIColor *barTintColor NS_AVAILABLE_IOS(7_0)
UI_APPEARANCE_SELECTOR;
iOS 7 barTintColor
full screen
status bar
navigation bar
cell:
UITableViewStyleGrouped

view controller’s view size
• iOS 7 view size full
screen
• iOS 6 view size full screen
• status bar black translucent
• controller wantsFullScreenLayout
YES
• navigation bar translucent YES
controller
320 * 568

nav bar & tab bar
nav bar controller
controller tab bar
( 519 = 568 - 49)
Extend Edges

bar translucent
nva bar translucent Under Top bars
tab bar translucent Under Bottom bars
Under Opaque Bars

bar
455 = 568 - 20 - 44 -49
UIViewController.h
@property(nonatomic,assign) UIRectEdge edgesForExtendedLayout;
@property(nonatomic,assign) BOOL extendedLayoutIncludesOpaqueBars;
UIGeometry.h
typedef NS_OPTIONS(NSUInteger, UIRectEdge) {
UIRectEdgeNone = 0,
UIRectEdgeTop = 1 << 0,
UIRectEdgeLeft = 1 << 1,
UIRectEdgeBottom = 1 << 2,
UIRectEdgeRight = 1 << 3,
UIRectEdgeAll = UIRectEdgeTop | UIRectEdgeLeft | UIRectEdgeBottom |
UIRectEdgeRight
};

- (void)viewDidLoad
{
! // Do any additional setup after loading the view, typically from a nib.
self.extendedLayoutIncludesOpaqueBars =YES;
self.edgesForExtendedLayout = UIRectEdgeTop | UIRectEdgeBottom;
}
scroll view inset
scroll view, table view, web view

automaticallyAdjustsScrollViewInsets
UIViewController.h
@property(nonatomic,assign) BOOL automaticallyAdjustsScrollViewInsets;
UIScrollView.h
@property(nonatomic) UIEdgeInsets contentInset;
UIGeometry.h
typedef struct UIEdgeInsets {
CGFloat top, left, bottom, right;
} UIEdgeInsets;
inset {64, 0, 0, 0}
content start from 64
automaticallyAdjustsScrollViewInsets NO

full screen
• iOS 6 : (0, 0)
• iOS 7:
• only status bar : (0, 20)
• status bar + nav bar: (0, 64)
topLayoutGuide &
bottomLayoutGuide
topLayoutGuide
nav bar

topLayoutGuide &
bottomLayoutGuide
topLayoutGuide status bar
topLayoutGuide &
bottomLayoutGuide
- (void)viewDidLoad
{
UIView *blueView = [[UIView alloc] initWithFrame:CGRectZero];
blueView.backgroundColor = [UIColor blueColor];
[self.view addSubview:blueView];
blueView.translatesAutoresizingMaskIntoConstraints = NO;
id topLayoutGuide = self.topLayoutGuide;
NSDictionary *viewsDictionary =
NSDictionaryOfVariableBindings(blueView,
topLayoutGuide);
[self.view addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@"V:
[topLayoutGuide]-10-[blueView(100)]" options:0 metrics:nil
views:viewsDictionary]];
[self.view addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@"H:|-50-[blueView(100)]" options:0
metrics:nil
views:viewsDictionary]];
}

bar
UIBarPositionAny
UIBarPositionBottom
UIBarPositionTop
UIBarPositionTopAttached
- (void)viewDidLoad
{
!
UIImage *image = [UIImage imageNamed:@"bar.png"];
UINavigationBar *navBar = [[UINavigationBar alloc]
[navBar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];
[self.view addSubview:navBar];
navBar.delegate = self;
}
- (UIBarPosition)positionForBar:(id <UIBarPositioning>)bar
{
return UIBarPositionTopAttached;
}
status bar
: status bar

:
- (UIStatusBarStyle)preferredStatusBarStyle
{
return UIStatusBarStyleLightContent;
}
- (UIStatusBarStyle)preferredStatusBarStyle
{
return UIStatusBarStyleDefault;
}
( )
method controller status bar
controller default
status bar
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:
(NSDictionary *)launchOptions
{
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
return YES;
}
status bar controller
View controller-based status bar appearance
(UIViewControllerBasedStatusBarAppearance)
NO setStatusBarStyle:

hide status bar
view controller
[[UIApplication sharedApplication]
setStatusBarHidden:isHide
withAnimation:UIStatusBarAnimationFade];
!
hide status bar
- (BOOL)prefersStatusBarHidden
{
return YES;
}
controller status bar

controller
[[UIApplication sharedApplication] setStatusBarHidden:YES
withAnimation:UIStatusBarAnimationFade];
work !
status bar
nav bar
• scroll
• 44 64
• nav bar 64
point

bar button item
UIImage *image = [UIImage imageNamed:@"foodIcon.png"];
image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithImage:image
style:UIBarButtonItemStylePlain target:self action:@selector(showSetting:)];
self.navigationItem.rightBarButtonItem = barButtonItem;
iOS 7 iOS 6 initWithCustomView
image render mode
UIImage.h
typedef NS_ENUM(NSInteger, UIImageRenderingMode) {
UIImageRenderingModeAutomatic,
UIImageRenderingModeAlwaysOriginal,
UIImageRenderingModeAlwaysTemplate,
}
UIImageRenderingModeAlwaysTemplate:
tint color

UINavigationController
scroll
• scroll
•
• ex:
• :
UINavigationController.h
@property(nonatomic, readonly) UIGestureRecognizer
*interactivePopGestureRecognizer;
self.navigationController.interactivePopGestureRecognizer.enabled
= NO;
delete

tab bar image
UITabBarItem.h
@property(nonatomic,retain) UIImage *selectedImage;
tint color
tab
keyboard
default
UITextInputTraits.h
UIKeyboardAppearanceDefault
UIKeyboardAppearanceDark
UIKeyboardAppearanceLight
textField.keyboardAppearance = UIKeyboardAppearanceDark;

keyboard
UIScrollView.h
typedef NS_ENUM(NSInteger, UIScrollViewKeyboardDismissMode) {
UIScrollViewKeyboardDismissModeNone,
UIScrollViewKeyboardDismissModeOnDrag,
UIScrollViewKeyboardDismissModeInteractive,
}
scrollView.keyboardDismissMode =
UIScrollViewKeyboardDismissModeInteractive;
UIScrollViewKeyboardDismissModeOnDrag:
scroll (ex: )
UIScrollViewKeyboardDismissModeInteractive:
scroll (ex: )
Picker
self.picker.backgroundColor =
[UIColor whiteColor];
:

picker
UITextField *textField = [[UITextField alloc]
textField.borderStyle = UITextBorderStyleRoundedRect;
[self.view addSubview:textField];
UIDatePicker *picker = [[UIDatePicker alloc] initWithFrame:
CGRectMake(0, 0, 320, 200)];
textField.inputView = picker;
alert view
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Hello" message:nil
delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles: nil];
[alertView show];
UIView *blueView = [[UIView alloc] initWithFrame:CGRectMake(10, 10, 50, 50)];
blueView.backgroundColor = [UIColor blueColor];
[alertView addSubview:blueView];
addSubview !
UIAlertView.h
typedef NS_ENUM(NSInteger, UIAlertViewStyle) {
UIAlertViewStyleDefault = 0,
UIAlertViewStyleSecureTextInput,
UIAlertViewStylePlainTextInput,
UIAlertViewStyleLoginAndPasswordInput
};

UIFontDescriptor.h
UIFontTextStyleHeadline
UIFontTextStyleSubheadline
UIFontTextStyleBody
UIFontTextStyleFootnote
UIFontTextStyleCaption1
UIFontTextStyleCaption2
self.nameLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
no change ?

App
-(void)updateTextSize
{
self.nameLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];
}
- (void)viewDidLoad
{
! // Do any additional setup after loading the view, typically from a nib.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(updateTextSize)
name:UIContentSizeCategoryDidChangeNotification object:nil];
}
:

-(void)updateTextSize
{
UIFontDescriptor *userFont = [UIFontDescriptor
preferredFontDescriptorWithTextStyle:UIFontTextStyleHeadline];
float userFontSize = [userFont pointSize];
self.nameLabel.font = [UIFont fontWithName:@"Chalkduster" size:userFontSize];
}
- (void)viewDidLoad
{
UIFontDescriptor *userFont = [UIFontDescriptor
preferredFontDescriptorWithTextStyle:UIFontTextStyleHeadline];
float userFontSize = [userFont pointSize];
self.nameLabel.font = [UIFont fontWithName:@"Chalkduster" size:userFontSize];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(updateTextSize)
name:UIContentSizeCategoryDidChangeNotification object:nil];
}
preferredFontDescriptorWithTextStyle:
layout
• :
auto layout
ex: label size size
• :
size
ex:
UIFont *nameLabelFont = [UIFont
preferredFontForTextStyle:UIFontTextStyleHeadline];
CGSize nameLabelFontSize = [@"Peter Pan" sizeWithAttributes:
@{NSFontAttributeName: nameLabelFont}];

Motion Effects
Parallax effect
3D

UIInterpolatingMotionEffect
- (void)viewDidLoad
{
!
UIInterpolatingMotionEffect *horizontalMotionEffect =
[[UIInterpolatingMotionEffect alloc]
initWithKeyPath:@"center.x"
type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis];
horizontalMotionEffect.minimumRelativeValue = @-50;
horizontalMotionEffect.maximumRelativeValue = @50;
[self.imageView addMotionEffect:horizontalMotionEffect];
}
UIMotionEffect
demo

- (void)viewDidLoad
{
UIInterpolatingMotionEffect *horizontalMotionEffect = [[UIInterpolatingMotionEffect
alloc] initWithKeyPath:@"center.x"
UIInterpolatingMotionEffect *verticalMotionEffect = [[UIInterpolatingMotionEffect
alloc] initWithKeyPath:@"center.y"
type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];
verticalMotionEffect.minimumRelativeValue = @-50;
verticalMotionEffect.maximumRelativeValue = @50;
[self.imageView addMotionEffect:verticalMotionEffect];
}

UIMotionEffectGroup *group = [[UIMotionEffectGroup alloc] init];
group.motionEffects = @[horizontalMotionEffect,
verticalMotionEffect];
[self.imageView addMotionEffect:group];
modify CALayer
- (void)viewDidLoad
{
self.imageView.layer.borderColor = [UIColor yellowColor].CGColor;
self.imageView.layer.borderWidth = 20;
UIInterpolatingMotionEffect *horizontalMotionEffect =
[[UIInterpolatingMotionEffect alloc]
initWithKeyPath:@"layer.borderWidth"
}

motion effect
• UIMotionEffect
• keyPathsAndRelativeValuesForViewerOffset:
http://www.teehanlax.com/blog/introduction-to-uimotioneffect/

iOS 7
• Core Animation:
• but
...
•
• UIAnimator:
physical engine
• UIDynamicBehavior:
UIAnimator
• UIDynamicItem protocol:
UIDynamicItem protocol
UIDynamicBehavior
• ReferenceView:
UIAnimator
2D

• Gravity
• Collision
• Attachments
• Snap
• Forces
• Item properties
UIDynamicItem
@interface UIView : UIResponder<NSCoding,
UIAppearance, UIAppearanceContainer,
UIDynamicItem> {

Architecture
Apple Sample Code
UIKit Dynamics Catalog
https://developer.apple.com/library/ios/samplecode/DynamicsCatalog

APLGravityViewController
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
UIDynamicAnimator *animator = [[UIDynamicAnimator
alloc] initWithReferenceView:self.view];
UIGravityBehavior *gravityBeahvior =
[[UIGravityBehavior alloc]
initWithItems:@[self.square1]];
[animator addBehavior:gravityBeahvior];
self.animator = animator;
}
@interface APLGravityViewController ()
@property (nonatomic, weak) IBOutlet UIImageView *square1;
@property (nonatomic, strong) UIDynamicAnimator *animator;
@end

• UIDynamicAnimator
• UIGravityBehavior
UIGravityBehavior
• UIGravityBehavior
UIDynamicAnimator !
UIGravityBehavior

gravityBeahvior.gravityDirection = CGVectorMake(1, -1);
{
UIDynamicAnimator *animator = [[UIDynamicAnimator alloc]
initWithReferenceView:self.view];
UIGravityBehavior *gravityBeahvior = [[UIGravityBehavior alloc]
UICollisionBehavior *collisionBehavior = [[UICollisionBehavior alloc]
collisionBehavior.translatesReferenceBoundsIntoBoundary = YES;
collisionBehavior.collisionDelegate = self;
[animator addBehavior:collisionBehavior];
}
APLCollisionGravityViewController

- (void)collisionBehavior:(UICollisionBehavior*)behavior
beganContactForItem:(id<UIDynamicItem>)item
withBoundaryIdentifier:(id<NSCopying>)identifier atPoint:
(CGPoint)p
{
[(UIView*)item setTintColor:[UIColor lightGrayColor]];
}
- (void)collisionBehavior:(UICollisionBehavior*)behavior
endedContactForItem:(id<UIDynamicItem>)item
withBoundaryIdentifier:(id<NSCopying>)identifier
{
[(UIView*)item setTintColor:[UIColor darkGrayColor]];
}

UIView *square2 = [[UIView alloc] initWithFrame:
CGRectMake(160, 300, 100, 100)];
square2.backgroundColor = [UIColor blueColor];
[self.view addSubview:square2];
UIKit Dynamics
UICollisionBehavior *collisionBehavior = [[UICollisionBehavior
alloc] initWithItems:@[self.square1, square2]];

Item Property
{
UIDynamicAnimator *animator = [[UIDynamicAnimator alloc]
initWithReferenceView:self.view];
UIGravityBehavior *gravityBeahvior = [[UIGravityBehavior alloc]
initWithItems:@[self.square1, self.square2]];
UICollisionBehavior *collisionBehavior = [[UICollisionBehavior alloc]
initWithItems:@[self.square1, self.square2]];
collisionBehavior.translatesReferenceBoundsIntoBoundary = YES;
self.square2PropertiesBehavior = [[UIDynamicItemBehavior alloc]
self.square2PropertiesBehavior.elasticity = 0.5;
self.square1PropertiesBehavior = [[UIDynamicItemBehavior alloc]
[animator addBehavior:self.square1PropertiesBehavior];
[animator addBehavior:self.square2PropertiesBehavior];
[animator addBehavior:collisionBehavior];
}
APLItemPropertiesViewController
item property
• elasticity: 0 ~ 1
• friction: 0 ~ 1
• density: 1
• resistance: 0
• angularResistance:
• allowsRotation: rotate

Replay
- (IBAction)replayAction:(id)sender
{
// Moving an item does not reset its velocity. Here we do that manually
// using the dynamic item behaviors, adding the inverse velocity for each
// square.
[self.square1PropertiesBehavior addLinearVelocity:CGPointMake(0, -1 *
[self.square1PropertiesBehavior linearVelocityForItem:self.square1].y)
forItem:self.square1];
self.square1.center = CGPointMake(90, 171);
[self.animator updateItemUsingCurrentState:self.square1];
[self.square2PropertiesBehavior addLinearVelocity:CGPointMake(0, -1 *
[self.square2PropertiesBehavior linearVelocityForItem:self.square2].y)
forItem:self.square2];
self.square2.center = CGPointMake(230, 171);
[self.animator updateItemUsingCurrentState:self.square2];
}

Combining behaviors
addChildBehavior
- (instancetype)initWithWeight:(id<UIDynamicItem>)item suspendedFromPoint:(CGPoint)p
{
self = [super init];
if (self)
{
UIGravityBehavior *gravityBehavior = [[UIGravityBehavior alloc]
initWithItems:@[item]];
UIAttachmentBehavior *attachmentBehavior = [[UIAttachmentBehavior alloc]
initWithItem:item attachedToAnchor:p];
UIAttachmentBehavior *draggingBehavior = [[UIAttachmentBehavior alloc]
initWithItem:item attachedToAnchor:CGPointZero];
UIPushBehavior *pushBehavior = [[UIPushBehavior alloc] initWithItems:@[item]
mode:UIPushBehaviorModeInstantaneous];
pushBehavior.active = NO;
[self addChildBehavior:gravityBehavior];
[self addChildBehavior:attachmentBehavior];
[self addChildBehavior:pushBehavior];
self.draggingBehavior = draggingBehavior;
self.pushBehavior = pushBehavior;
}
return self;
}
APLPendulumBehavior
https://github.com/shu223/iOS7-Sampler

iOS 7 SDK特訓班

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