CS193P - Lecture 11. iphone Application Development. Text Input Presenting Content Modally

Transcription

1 CS193P - Lecture 11 iphone Application Development Text Input Presenting Content Modally 1

2 Announcements 2

3 Announcements Paparazzi 3 assignment is due Wednesday 2/17 2

4 Announcements Paparazzi 3 assignment is due Wednesday 2/17 This Friday s extra session will feature Evan Doll 2

5 Today s Topics Threading Wrap-Up iphone Keyboards Customizing Text Input Presenting Content Modally 3

6 Alternatives to Threading 4

7 Alternatives to Threading Asynchronous (nonblocking) functions Specify target/action or delegate for callback NSURLConnection has synchronous and asynchronous variants 4

8 Alternatives to Threading Asynchronous (nonblocking) functions Specify target/action or delegate for callback NSURLConnection has synchronous and asynchronous variants Timers One-shot or recurring Specify a callback method Managed by the run loop 4

9 Alternatives to Threading Asynchronous (nonblocking) functions Specify target/action or delegate for callback NSURLConnection has synchronous and asynchronous variants Timers One-shot or recurring Specify a callback method Managed by the run loop Higher level constructs like operations 4

10 NSOperation Abstract superclass Manages thread creation and lifecycle Encapsulate a unit of work in an object Specify priorities and dependencies 5

11 Creating an NSOperation Subclass 6

12 Creating an NSOperation Subclass Define a custom init method - (id)initwithsomeobject:(id)someobject { self = [super init]; if (self) { self.someobject = someobject; } return self; } 6

13 Creating an NSOperation Subclass Define a custom init method - (id)initwithsomeobject:(id)someobject { self = [super init]; if (self) { self.someobject = someobject; } return self; } Override -main method to do work - (void)main { [someobject dolotsoftimeconsumingwork]; } 6

14 NSOperationQueue Operations are typically scheduled by adding to a queue Choose a maximum number of concurrent operations Queue runs operations based on priority and dependencies 7

15 Using an NSInvocationOperation Concrete subclass of NSOperation For lightweight tasks where creating a subclass is overkill 8

16 Using an NSInvocationOperation Concrete subclass of NSOperation For lightweight tasks where creating a subclass is overkill - (void)someaction:(id)sender { NSInvocationOperation *operation = [[NSInvocationOperation alloc] initwithtarget:self selector:@selector(dowork:) object:someobject]; [queue addobject:operation]; } [operation release]; 8

17 iphone Keyboards 9

18 Virtual keyboard Appears when needed 10

19 Virtual keyboard Appears when needed 11

20 12

21 13

22 Portrait and Landscape 13

23 Simple selection model Text loupe/magnifier 14

24 Many keyboard types Adapted to task 15

25 Many keyboard types Adapted to task 16

26 Many keyboard types Adapted to task 17

27 Many keyboard types Adapted to task 18

28 Many keyboard types Adapted to task 19

29 Many keyboard types Adapted to task 20

30 Single line editing 21

31 Multi-line editing 22

32 40 Languages 23

33 40 Languages Full dictionary support 23

34 English 24

35 French 25

36 Russian 26

37 Korean 27

38 Japanese Romaji 28

39 Japanese Kana 29

40 Chinese Pinyin 30

41 Chinese Handwriting Simplified Traditional 31

42 Customizing Text Input 32

43 Text Containers 33

44 Text Containers Delegates Notifications Methods 34

45 Text Containers Text Input Traits 35

46 Protocol Text Input Traits UITextField UITextView 36

47 Text Input Traits Autocapitalization Autocorrection Keyboard Type Keyboard Appearance Return Key Type Return Key Autoenabling Secure Text Entry 37

48 Text Input Traits URL Keyboard Go button 38

49 Text Input Traits Default Keyboard Google button 39

50 Text Containers Text Input Traits Delegates Notifications Methods 40

51 Text Containers 41

52 UITextField Design time 42

53 UITextField URL Keyboard Go button Design time 43

54 UITextField URL Keyboard Go button Run time 44

55 UITextField URL Keyboard Go button Become first responder 45

56 Keyboard UITextField URL Keyboard Go button Become first responder 45

57 Keyboard UITextField URL Keyboard Go button Become first responder 46

58 Keyboard UITextField URL Keyboard Go button Become first responder 46

59 Keyboard UITextField URL Keyboard Go button Keyboard adopts traits 47

60 Keyboard URL Keyboard Go button UITextField URL Keyboard Go button Keyboard adopts traits 47

61 UITextField Text Containers UITextView Web Forms 48

62 Demo: Text Input 49

63 Presenting Content Modally 50

64 Presenting Content Modally For adding or picking data 51

65 Presenting Content Modally For adding or picking data 51

66 Presenting Content Modally For adding or picking data 51

67 Presenting a View Controller 52

68 Presenting a View Controller // Recipe list view controller - (void)showaddrecipe { RecipeAddViewController *viewcontroller =...; [self presentmodalviewcontroller:viewcontroller animated:yes]; } 52

69 Presenting a View Controller // Recipe list view controller - (void)showaddrecipe { RecipeAddViewController *viewcontroller =...; [self presentmodalviewcontroller:viewcontroller animated:yes]; } 52

70 Dismissing a View Controller 53

71 Dismissing a View Controller // Recipe list view controller - (void)didaddrecipe { [self dismissmodalviewcontrolleranimated:yes]; } 53

72 Dismissing a View Controller // Recipe list view controller - (void)didaddrecipe { [self dismissmodalviewcontrolleranimated:yes]; } 53

73 Separate Navigation Stacks 54

74 Separate Navigation Stacks 54

75 Separate Navigation Stacks 54

76 Separate Navigation Stacks 54

77 Separate Navigation Stacks 54

78 Dismissing a Modal View Controller 55

79 Dismissing a Modal View Controller Who should do it? 55

80 Dismissing a Modal View Controller Who should do it? Best practice is for the same object to call present and dismiss 55

81 Dismissing a Modal View Controller Who should do it? Best practice is for the same object to call present and dismiss Define delegate methods for the presented controller 55

82 Dismissing a Modal View Controller Who should do it? Best practice is for the same object to call present and dismiss Define delegate methods for the presented controller Tell the delegate when the presented controller is done 55

83 Dismissing a Modal View Controller Who should do it? Best practice is for the same object to call present and dismiss Define delegate methods for the presented controller Tell the delegate when the presented controller is done The delegate makes the call to dismiss 55

84 Dismissing a Modal View Controller Who should do it? Best practice is for the same object to call present and dismiss Define delegate methods for the presented controller Tell the delegate when the presented controller is done The delegate makes the call to dismiss Parent Controller 55

85 Dismissing a Modal View Controller Who should do it? Best practice is for the same object to call present and dismiss Define delegate methods for the presented controller Tell the delegate when the presented controller is done The delegate makes the call to dismiss Parent Controller Present Child Controller 55

86 Dismissing a Modal View Controller Who should do it? Best practice is for the same object to call present and dismiss Define delegate methods for the presented controller Tell the delegate when the presented controller is done The delegate makes the call to dismiss Parent Controller Child Controller I m done! 55

87 Dismissing a Modal View Controller Who should do it? Best practice is for the same object to call present and dismiss Define delegate methods for the presented controller Tell the delegate when the presented controller is done The delegate makes the call to dismiss Parent Controller Dismiss Child Controller 55

88 Dismissing a Modal View Controller Who should do it? Best practice is for the same object to call present and dismiss Define delegate methods for the presented controller Tell the delegate when the presented controller is done The delegate makes the call to dismiss Parent Controller 55

89 Demo: Presenting Content Modally 56

90 Questions? 57