Month: July 2012

Assignment #5 Task #1

Please note, this blog entry is from a previous course. You might want to check out the current one.

The fifth assignment continues the application from the last assignment which create a navigation-based application to let users browse photos by looking in the most popular Flickr locations, then click on any they are interested in to see a photo of it. This assignment will fix problems with the responsiveness of the user-interface by using GCD to move blocking activity out of the main thread and by cacheing the image data received from Flickr. In addition, some maps will be added and the application will become Universal.

Your application must implement all the required tasks from the last assignment (and all the required tasks in this assignment) without doing any Flickr fetching or file system interactions in the main thread. Your user-interface should be responsive to the user at all times (i.e. the main thread should never be blocked).

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Friday Session #5: Time Profiler

Please note, this blog entry is from a previous course. You might want to check out the current one.

This weeks Friday session addresses the Time Profiler. It can be found on iTunes titled “Time Profiler (November 4, 2011)”.

In this session Alexander Chia shows when and how to use the time profiler on an example project calculation pi via a monte carlo algorithm and on a graphic calculator.

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Lecture #12: Persistence

Please note, this blog entry is from a previous course. You might want to check out the current one.

Lecture twelve is named “12. Persistence (November 3, 2011)” and can be found at iTunes. Its slides are available at Stanford.

The first part of this lecture is designated to guidelines of the final project of the course and because it is targeted at campus students has been omitted from the iTunes stream.

The second part is devoted to persistence – the ways to save data between launchings of an application.
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Lecture #11: Core Location and MapKit

Please note, this blog entry is from a previous course. You might want to check out the current one.

Lecture eleven is named “11. Core Location and MapKit (November 1, 2011)” and can be found at iTunes. Its slides are available at Stanford.

The theoretical part starts with an introduction to Core Location and MapKit.

CoreLocation is a framework managing location and heading and has no user interface. Its basic object is CLLocation and contains properties like coordinate, altitude, horizontal/verticalAccuracy, timestamp, speed, course.
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Assignment #4 Extra Task #1

Please note, this blog entry is from a previous course. You might want to check out the current one.

Divide your list of top places into sections (in the table view sense) by country. This will require a little bit different data structure in that MVC.

To sort our places into countries we need two new properties for the data model. placesByCountry will hold the places separated into their countries. countries will just hold the names of the countries sorted alphabetically.

@property (nonatomic, strong) NSDictionary *placesByCountry;
@property (nonatomic, strong) NSArray *countries;
   ...
@synthesize placesByCountry = _placesByCountry;
@synthesize countries = _countries;

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