4. CoreData for other non-health stats You made it to the end! Ok, so we are basically going to be adding another store to our app and reading and writing data to THAT store as well. First let’s add a new tab and make it a UITableViewController as well. It will have dynamically populated cells. Now embed it! Your final storyboard should look like this: Add a new Swift class called Swimming Data and set that new UITableViewController scene to its class. Make that class file look like this: import Foundation import UIKit class SwimmingData: UITableViewController { } Now we must add CoreData. To do this we need to… Read More
Continue ReadingHealthKit for iOS8: Part 6
Here is the start of our WorkOut view controller: import Foundation import UIKit import HealthKit class WorkoutViewController: UITableViewController, UITextFieldDelegate { @IBOutlet var numberOfLapsTextField: UITextField! @IBOutlet var metersPerLapTextField: UITextField! @IBOutlet var workoutDurationTextField: UITextField! @IBOutlet var paceTextField: UITextField! var numberOfLapsValue: NSString? var metersPerLapValue: NSString? var workoutDurationValue: NSString? var userWeight: Double? var healthStore:HKHealthStore? } We import what we need, we subclass UITableViewController and add the Text Field delegate protocol. Here I have created 4 labels for: numberOfLaps metersPerLap workoutDuration pace These labels have an underlying variable for each. The reason the first 3 are strings is because these are not health kit data per se. These will be stored in CoreData. However they… Read More
Continue ReadingHealthKit for iOS8: Part 5
Jumping right in, our Energy view controller class starts out like this: import Foundation import UIKit import HealthKit class EnergyViewController: UITableViewController { var energyFormatter: NSEnergyFormatter { var energyFormatter: NSEnergyFormatter? var onceToken: dispatch_once_t = 0 dispatch_once(&onceToken, { energyFormatter = NSEnergyFormatter() energyFormatter?.unitStyle = NSFormattingUnitStyle.Long energyFormatter?.forFoodEnergyUse = true energyFormatter?.numberFormatter.maximumFractionDigits = 2 }) return energyFormatter! } // No required initWithCoder pasted in… var healthStore:HKHealthStore? @IBOutlet weak var activeEnergyBurnedValueLabel: UILabel? @IBOutlet weak var restingEnergyBurnedValueLabel: UILabel? @IBOutlet weak var consumedEnergyValueLabel: UILabel? @IBOutlet weak var netEnergyValueLabel: UILabel? var activeEnergyBurned: Double = 0 var restingEnergyBurned: Double = 0 var consumedEnergy: Double = 0 var netEnergy: Double = 0 } We take care of our imports, subclass UITableViewController, create… Read More
Continue ReadingHealthKit for iOS8: Part 3
Great! Now let’s move on to the Journal View Controller. It’ll be a good relax! 🙂 Ok we start out importing the frameworks we need: import UIKit import HealthKit Ok now let’s declare our class properties: class JournalViewController: UITableViewController { let JournalViewControllerTableViewCellReuseIdentifier: NSString = “Cell” var foodItems: NSMutableArray? var energyFormatter: NSEnergyFormatter { var energyFormatter: NSEnergyFormatter? var onceToken: dispatch_once_t = 0 dispatch_once(&onceToken, { energyFormatter = NSEnergyFormatter() energyFormatter?.unitStyle = NSFormattingUnitStyle.Long energyFormatter?.forFoodEnergyUse = true … Read More
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HealthKit for iOS8: Part 4
Ok so the Journal view controller was quite simple. Let’s take another quick break by looking at an even simpler view controller, the FoodPicker: import Foundation import UIKit import HealthKit class FoodPickerViewController: UITableViewController { var selectedFoodItem: FoodItem? let FoodPickerViewControllerTableViewCellIdentifier:NSString = “cell” let FoodPickerViewControllerUnwindSegueIdentifier:NSString = “FoodPickerViewControllerUnwindSegueIdentifier” var foodItems: NSArray = NSArray() var energyFormatter: NSEnergyFormatter { var energyFormatter: NSEnergyFormatter? var onceToken: dispatch_once_t = 0 dispatch_once(&onceToken, { energyFormatter = NSEnergyFormatter() energyFormatter?.unitStyle = NSFormattingUnitStyle.Long energyFormatter?.forFoodEnergyUse = true energyFormatter?.numberFormatter.maximumFractionDigits = 2 }) return energyFormatter! } var healthStore:HKHealthStore? } Here we are looking at imports, subclassing UITableViewController and property declarations. Our first property is selectedFoodItem, which will be set to whatever value the user selects from… Read More
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Swift Optionals Quick Reference
Optionals confuse me so I wrote this post and hope it can be of some help. OPTIONALS Takeaway #1: Optionals are used to declare a variable but are not assigned a value at start Takeaway #2: Optionals contain a Some or None value, they DONT contain a String or Array or whatever else. Takeaway #3: Therefore we MUST unwrap the value of an Optional to see what the prize is 🙂 In other words, to access its value! Takeaway #4: DECLARATION OPTIONS A) Using the following syntax: var someVar? – You will mostly use this… B) Using “var someVar!” <Implicitly unwrapped> – Unfortunately UIKit & other Apple frameworks will use a lot of… Read More
Continue ReadingWhy, oh Why, did Apple take away ARC just to give us Optionals!?
I’m having trouble understanding optionals so here is a shot at explaining them. 🙂 var thisIsAnInt: Int Simple, this is an Int variable declaration. var couldBeAnInt: Int? This on the other hand is an optional variable declaration. This optional declaration doesn’t mean: “this is an int, which is optional”. It reads more like: This is an OPTIONAL variable. It’s a type of variable in and of itself. Its NOT NECESSARILY an Int. It just may or may NOT contain an Int”. Woah! Ok so what is it for and when do you use it. Well that part seems simple enough: If that variable can or could or may be nil… Read More
Continue ReadingSwift Tutorial II
Ok so in the first tutorial we covered let, which is the keyword for defining constants. let thisBeAConstant = 3.141 Now we are going to cover variables, which use the var keyword like so: var thisVariable = time Notice 2 things about Swift: 1) We don’t use ; at the end of a line. That’s just weird 🙂 2) We don’t have to specify the type. The type is inferred by whatever value you pass in, so: var someString = “this is a string” var someInteger = 5 So Swift is kinda smart. Now let’s meet some old friends “Hao jiu bu juan” ARRAYS var energies = [“solar”, “wind”, “fossil”, “this is a… Read More
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