Session 225 - Up and Running: Making a Great Impression with Every Launch

Transcript

1. These are confidential sessions—please refrain from streaming, blogging, or taking pictures Making a great impression with every launch Session 225 Up and Running Jim Turner iOS Frameworks
4. application:didFinishLaunchingWithOptions:
5. Demo Brandon Newendorp iOS Software Engineer
6. I see what you did there Watchdog
7. I see what you did there Watchdog
8. I see what you did there Watchdog
9. Ensures app launch time Exception Type: 00000020 Exception Codes: Highlighted Thread: 0 Application Specific Information: com.your.app.id failed to launch in time Elapsed total CPU time (seconds): 11.120 (user 1.840, system 9.280), 59% CPU Elapsed application CPU time (seconds): 2.160, 12% CPU I see what you did there Watchdog 0x8badf00d
10. I see what you did there Watchdog 0x8badf00d
11. I see what you did there Watchdog
12. I see what you did there Watchdog
13. I see what you did there Watchdog
14. Demo App Startup
15. Interface Demo App Startup
16. Interface Network Demo App Startup
17. Interface Network Database Demo App Startup
18. Interface Network Database Payload Demo App Startup
19. Interface Network Database Payload External Library Demo App Startup
20. Interface Network Database Payload External Library Demo App Startup Core Location iAd Options Processing
21. Demo App Startup Main Queue
22. Demo App Startup Main Queue application:didFinishLaunchingWithOptions:
23. Demo App Startup Network Interface Database External Library  Payload Main Queue
24. Demo App Startup Network Interface Database External Library  Payload Main Queue 5 seconds
25. Demo App Startup Network Interface Database External Library  Payload Main Queue 5 seconds That’s not good
26. Put your UI on a diet Interface Loading
27. Put your UI on a diet Interface Loading •Eases creation
28. Put your UI on a diet Interface Loading •Eases creation •Allows experimentation
29. Put your UI on a diet Interface Loading •Eases creation •Allows experimentation •Reduces code
30. Put your UI on a diet Interface Loading •Eases creation •Allows experimentation •Reduces code •However…
31. Put your UI on a diet Interface Loading •Eases creation •Allows experimentation •Reduces code •However… ▪ Must instantiate entire object graph
32. Put your UI on a diet Interface Loading •Eases creation •Allows experimentation •Reduces code •However… ▪ Must instantiate entire object graph ▪ Main queue
33. Put your UI on a diet Interface Loading •Eases creation •Allows experimentation •Reduces code •However… ▪ Must instantiate entire object graph ▪ Main queue ▪ Side effects
40. Storyboards Interface Loading
41. Storyboards Interface Loading •Preferred to xib
42. Storyboards Interface Loading •Preferred to xib •Single file
43. Storyboards Interface Loading •Preferred to xib •Single file •Tool/Framework support
44. Storyboards Interface Loading •Preferred to xib •Single file •Tool/Framework support •Simplify
45. Demo App Startup Network Database External Library  Payload Main Queue Interface
46. Demo App Startup Network Database External Library  Payload Main Queue
47. Demo App Startup Network Database Payload Main Queue External Library 
48. Demo App Startup Network Database Payload Main Queue External Library 
49. Time does not pass in The Waiting Place Network Communication
50. Time does not pass in The Waiting Place Network Communication •Undefined behavior
51. Time does not pass in The Waiting Place Network Communication •Undefined behavior •Blocking vs. non-blocking
52. Time does not pass in The Waiting Place Network Communication •Undefined behavior •Blocking vs. non-blocking •Applies to all synchronous methods/behaviors
53. Network Communication _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error];
54. Network Communication _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error];
55. Network Communication _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error];
56. Network Communication _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error];
57. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… waiting…
58. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… waiting…
59. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… waiting… Main Queue
60. Network Communication _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error];
61. Network Communication dispatch_async(serialQueue, ^{ _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error]; });
62. Network Communication dispatch_async(serialQueue, ^{ _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error]; });
63. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… waiting… Main Queue
64. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… waiting… Main Queue
65. Background Queue Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… waiting…
66. Background Queue Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… waiting…
67. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… Background Queue
68. Network Communication _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error];
69. dispatch_async(concurrentQueue, ^{ _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; }); dispatch_async(concurrentQueue, ^{ NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; }); dispatch_async(concurrentQueue, ^{ NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error]; }); Network Communication
70. dispatch_async(concurrentQueue, ^{ _XMLparser = [[NSXMLParser alloc] initWithContentsOfURL:…]; }); dispatch_async(concurrentQueue, ^{ NSData *imgData = [NSData dataWithContentsOfURL:…]; UIImage *img = [UIImage imageWithData:imgData]; }); dispatch_async(concurrentQueue, ^{ NSData *formResults = [NSURLConnection sendSynchronousRequest:req returningResponse:nil error:&error]; }); Network Communication
71. NSOperation Network Communication
72. NSOperation Network Communication •Asynchronous
73. NSOperation Network Communication •Asynchronous •Concurrent
74. NSOperation Network Communication •Asynchronous •Concurrent •Tune resource usage
75. NSOperation Network Communication •Asynchronous •Concurrent •Tune resource usage •Dependencies
76. NSOperation Network Communication •Asynchronous •Concurrent •Tune resource usage •Dependencies •Cancellation
77. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… waiting… Main Queue
78. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished waiting… waiting… waiting… waiting… waiting… Main Queue
79. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished Processing Queue
80. Network Communication Downloads Current Info JSON Image Image Article Data Twitter [614 KB] [22 KB] [17.9 MB] [12.2 MB] [4.8 MB] [977 KB] Finished Processing Queue
81. Demo App Startup Network Database Payload Main Queue External Library 
82. Demo App Startup Network Database Payload Main Queue External Library  Processing Queue
83. Demo App Startup Main Queue Processing Queue Network Database Payload External Library 
84. Demo App Startup Main Queue Processing Queue Network Database Payload External Library 
85. Database Payload External Library
86. Database Payload External Library
87. Database Payload External Library •General processing
88. Database Payload External Library •General processing •Need not block the app from launching
89. Database Payload External Library •General processing •Need not block the app from launching •Parallelizable
90. Database Payload External Library •General processing •Need not block the app from launching •Parallelizable •Dependent on the network
91. General Processing stockDatabase = [[DBManager alloc] initWithDatabaseName:@"Stocks"]; [stockDatabase updateTickerData]; [stockDatabase updateSymbols]; xmlParser = [[NSXMLParser alloc] initWithData:dataFromServer]; [xmlParser parse];
92. stockDatabase = [[DBManager alloc] initWithDatabaseName:@"Stocks"]; [stockDatabase updateTickerData]; [stockDatabase updateSymbols]; xmlParser = [[NSXMLParser alloc] initWithData:dataFromServer]; [xmlParser parse]; General Processing
93. General Processing dispatch_async(concurrentQueue, ^{ stockDatabase = [[DBManager alloc] initWithDatabaseName:@"Stocks"]; [stockDatabase updateTickerData]; [stockDatabase updateSymbols]; }); xmlParser = [[NSXMLParser alloc] initWithData:dataFromServer]; [xmlParser parse];
94. General Processing dispatch_async(concurrentQueue, ^{ stockDatabase = [[DBManager alloc] initWithDatabaseName:@"Stocks"]; [stockDatabase updateTickerData]; [stockDatabase updateSymbols]; }); xmlParser = [[NSXMLParser alloc] initWithData:dataFromServer]; [xmlParser parse];
95. General Processing dispatch_async(concurrentQueue, ^{ stockDatabase = [[DBManager alloc] initWithDatabaseName:@"Stocks"]; [stockDatabase updateTickerData]; [stockDatabase updateSymbols]; }); xmlParser = [[NSXMLParser alloc] initWithData:dataFromServer]; [xmlParser parse];
96. General Processing
97. General Processing _operationQueue = [[NSOperationQueue alloc] init];
98. General Processing _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; Processing Queue
99. General Processing _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... Processing Queue Network Operation Network Operation Network Operation
100. Parse XML General Processing _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; Processing Queue Network Operation Network Operation Network Operation
101. Parse XML General Processing _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; Processing Queue Network Operation Network Operation Network Operation
102. Parse XML General Processing _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp]; Processing Queue Network Operation Network Operation Network Operation
103. General Processing Processing Queue Network Operation Network Operation Network Operation Parse XML _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp];
104. General Processing Processing Queue Network Operation Network Operation Parse XML _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp];
105. Network Operation General Processing Processing Queue Network Operation Parse XML _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp];
106. Network Operation General Processing Processing Queue Network Operation Parse XML Slooow... _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp];
107. Network Operation General Processing Processing Queue Network Operation Parse XML Slooow... Payload _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp];
108. General Processing Processing Queue Network Operation Parse XML Slooow... Payload _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp];
109. General Processing Processing Queue Network Operation Parse XML Slooow... _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp];
110. General Processing Processing Queue Network Operation Parse XML Slooow... _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp];
111. General Processing Processing Queue _operationQueue = [[NSOperationQueue alloc] init]; [_operationQueue setName:@”Processing Queue”]; NSOperation *networkOp = ... NSBlockOperation *xmlOp = [NSBlockOperation blockOperationWithBlock:^{...}]; [xmlOp addDependency:networkOp]; [_operationQueue addOperation:xmlOp];
112. Demo App Startup Main Queue Processing Queue Network Database External Library  Payload
113. Demo App Startup Main Queue Processing Queue Network Database External Library  Payload Much better
114. ?
115. Highest Rated Popular Patti 6/5/12 Most Creative Creative Carl 6/5/12 Least Popular Sad Samantha 6/5/12 Top Trending Trendy Trent 6/5/12 ? ? ? ?
116. Highest Rated Popular Patti 6/5/12 Most Creative Creative Carl 6/5/12 Least Popular Sad Samantha 6/5/12 Top Trending Trendy Trent 6/5/12 ? ? ? ? Highest Rated Popular Patti 6/5/12 Wow L. Micarel 6/3/12 Least Popular Sad Samantha 6/5/12 Frisbee N. Jones 6/1/12 ? ?
117. Jump! W. Joseph 6/5/12 Wow L. Micarel 6/3/12 Seine J. Johnson 5/27/12 Frisbee N. Jones 6/1/12 Highest Rated Popular Patti 6/5/12 Most Creative Creative Carl 6/5/12 Least Popular Sad Samantha 6/5/12 Top Trending Trendy Trent 6/5/12 ? ? ? ? Highest Rated Popular Patti 6/5/12 Wow L. Micarel 6/3/12 Least Popular Sad Samantha 6/5/12 Frisbee N. Jones 6/1/12 ? ?
118. What Remains
119. What Remains
120. What Remains
121. What Remains
122. State Restoration What Remains
123. State Restoration What Remains •Save and restore application state
124. State Restoration What Remains •Save and restore application state •New delegate method
125. State Restoration What Remains •Save and restore application state •New delegate method application:didFinishLaunchingWithOptions:
126. State Restoration What Remains •Save and restore application state •New delegate method
127. State Restoration What Remains •Save and restore application state •New delegate method application:willFinishLaunchingWithOptions:
128. State Restoration What Remains •Save and restore application state •New delegate method application:willFinishLaunchingWithOptions: Saving and Restoring Application State on iOS Russian Hill Thursday 3:15PM
129. Demo Brandon Newendorp iOS Software Engineer
130. Hint: He’s going to test Preventing Regressions
131. Hint: He’s going to test Preventing Regressions •Be vigilant
132. Hint: He’s going to test Preventing Regressions •Be vigilant •Automate performance testing
133. Network Link Conditioner Preventing Regressions
134. Wrap Up
135. Wrap Up •“Do I need this here?”
136. Wrap Up •“Do I need this here?” •Unneighborly network
137. Wrap Up •“Do I need this here?” •Unneighborly network •Don’t abuse dispatch_async
138. Wrap Up •“Do I need this here?” •Unneighborly network •Don’t abuse dispatch_async •What can you provide immediately?
139. Related Session Saving and Restoring Application State on iOS Russian Hill Thursday 3:15PM
140. More Information Jake Behrens UI Frameworks Evangelist behrens@apple.com Documentation UIApplicationDelegate protocol Storyboards NSOperation and NSOperationQueue State Restoration http://developer.apple.com/ Apple Developer Forums http://devforums.apple.com
142. The last 3 slides after the logo are intentionally left blank for all presentations.
143. The last 3 slides after the logo are intentionally left blank for all presentations.
144. The last 3 slides after the logo are intentionally left blank for all presentations.