thoughtpower
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Complete Stanford iOS class Assignm...
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thoughtpower commits to:
Completing Stanford Assignment 5 by 4/1/13. I should also post notes on lectures 11, 12, 13, and 14 here on stickk.
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My Commitment Journal
 thoughtpower
April 1, 2013, 9:15 AM
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| I completed Assignment 5 and downloaded it onto my iphone. Will show Sara tomorrow. | |
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thoughtpower
April 1, 2013, 9:14 AM
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Lecture 12 - Persistence - Archiving objects - Rarely if ever use this - File System - Unix file system (starts at /) - Can only write inside the app's sandbox - application bundles directory (NOT writeable) - documents directory - caches directory - NSSearchPathDirectory (other) - NSFileManagerClass - utility methods - check to see if file exists, create/enumerate directories, move, copy, delete files - is not used for reading and writing to files - Aside: NSData's writeTOUrl to put images into cache - NSString - file appending strings, for example - SQLLite - SQL in a single file |
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thoughtpower
April 1, 2013, 9:13 AM
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Lecture 11 - Core Location - framework for managing location and heading - CLLocation - properties - coordinate, altitude, horizontal/vertical accuracy, timestamp, speed, course - accurracy costs power - speed - negative value, means it's an invalid speed - To set it up - 1) Check to see what hardware is available - Check if locationServicesEnabled has been allowed by user - - 2) Create a CLLocationManager instance and set up its delegate to receive updates - 3) Configure manager according to which kind of location updating you wnat - 4) Start the manager monitoring for location changes - accuracy-based continual updates - updates only when signficant changes occur - region-based updates - heading monitoring - error reporting to the delegate - signficant location changes monitoring - works even if app is not running - same for regionbased monitoring, can specify accuracy - Mapkit - MKMapView - can have annotations on it - coordinate, title, subtitle - How to create it - Drag it out from Xcode - displays an array of annotation objects - cannot set this directly, it's a read only attribute. Must call the addAnnotation(s) methods - MKAnnotation objects - MKAnnotationView associated with an MKAnnotation, in a very similar way to how table view cells are associated with cells - mapView: viewForAnnotation similar to cellForRowAtAindexPath - usually set canShowCallout = YES - MKAnnotationView - properties: - annotation - image // instead of the pin - left/rightcalloutaccessoryviews - enabled - centerOffset - draggable // Annotation must implement setCoordinate - can set one of the callout accessory views to a UIControl - mapView: annotation: calloutAccessoryControlTapped gets called - can use didSelectAnnotationView to load up callout accessories - in mapView: viewForAnnotation, set the UIImageView and set it to nil - Then in didSelectAnnotationView, load the image - be careful because by the time the image loads, the pin may not even be on screen, and the pins get reused - Can set MKMapView settings - mapType - showUserLocation - zoomEnabled - scrollEnabled - Overlays - Instead of just displaying a simple annotation object, you can draw something on that region, drawRect - Demo - Building on demo from lecture 10 - Create a new UIViewController (drag onto screen) which will show the map - Create UIViewController subclass, mapViewController - Create the outlet as private outlet - You will see an error by default, must include the mapkit framework - define the model (in header file of controller) - array of annotations - overload the getters for mapView and annotations to keep the view and the model in sync - Link up the TVC with the new mapViewController - ctrl-drag from a table element to the new mapViewController in the storyboard - name the segue - in the TVC, define prepareForSegue - set the annotations object on the new controller to be loaded - cast segue.destinationViewController to be of type mapViewController * - next we must get the annotations corresponding to a single photo - create a new class, subclass of NSObject: FlickrPhotoAnnotatoin - in the header file, declare that it implements MKAnnotation - create a CLASS function called annotationForPhoto - returns a FlickrPhotoAnnotation * - It should alloc init the FlickrPhotoAnnotation object, set the photo and then return the new object - also define a property "photo" so that people can get the photo back - in the implementation - implement the title, subtitle and coordinate functions - In mapViewController, make it the delegate for the mapView - then we can set the viewForAnnotation method - set a leftCallOutAccessory to a UIImageView which we set to nil (assuming we want a left call out image - then define the didSelectAnnotation method which sets the image |
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saralin
- Referee approval report
Yep, showed me the app.
thoughtpower
- Committed user success report
thoughtpower
- Committed user success report
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