DonMag

// Note: this will only rotate it 180 degrees, once
UIView.animateWithDuration(1.0, 
	animations: {self.arrowImageView.transform = CGAffineTransformMakeRotation(CGFloat(M_PI))}
)

// Note: this will rotate it 180 degrees, each time it's called
UIView.animateWithDuration(1.0, 
	animations: {self.arrowImageView.transform = CGAffineTransformRotate(self.arrowImageView.transform, CGFloat(M_PI))}
)

DonMag

ProjRoot/

  - folderA/sourceA.h
  - folderA/sourceA.cpp
  
  - folderB/sourceB.h
  - folderB/sourceB.cpp
  
//in sourceB.h
//

DonMag

// compare Time - Hour Minute Second - between two dates, ignoring the date part
- (BOOL)isTime:(NSDate *)d1 equalTo:(NSDate *)d2 {
	
	unsigned int flags = NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;
	NSCalendar* calendar = [NSCalendar currentCalendar];
	
	NSDateComponents* components1 = [calendar components:flags fromDate:d1];
	NSDateComponents* components2 = [calendar components:flags fromDate:d2];
	
	NSDate* timeOnly1 = [calendar dateFromComponents:components1];

DonMag

import UIKit

class ViewController: UIViewController {

	@IBOutlet weak var myNavBar: UINavigationBar!
	
	override func viewDidLoad() {

		super.viewDidLoad()

DonMag

///////
let time = "2015-10-29T05:22:15.000000Z"
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "yyyy'-'MM'-'dd'T'HH':'mm':'ss.SSS'Z'"

//dateFormatter.dateStyle = .ShortStyle
//dateFormatter.timeStyle = .ShortStyle

// if either Style line is uncommented,
// the next line shows an error

DonMag

#define strA "Hello"
#define strB "World"
#define strC strA " " strB

// strC is now defined as "Hello World"  (without the quotes)

// then, later in code...
NSLog(@"Value of strC = [%s]", strC);

DonMag

== Device Types ==
iPhone 4s (com.apple.CoreSimulator.SimDeviceType.iPhone-4s)
iPhone 5 (com.apple.CoreSimulator.SimDeviceType.iPhone-5)
iPhone 5s (com.apple.CoreSimulator.SimDeviceType.iPhone-5s)
iPhone 6 (com.apple.CoreSimulator.SimDeviceType.iPhone-6)
iPhone 6 Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-6-Plus)
iPhone 6s (com.apple.CoreSimulator.SimDeviceType.iPhone-6s)
iPhone 6s Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-6s-Plus)
iPad 2 (com.apple.CoreSimulator.SimDeviceType.iPad-2)
iPad Retina (com.apple.CoreSimulator.SimDeviceType.iPad-Retina)

DonMag

	UIBezierPath *shadowPath = [UIBezierPath bezierPathWithRect:view.bounds];
	view.layer.masksToBounds = NO;
	view.layer.shadowColor = [UIColor blackColor].CGColor;
	view.layer.shadowOffset = CGSizeMake(5.0f, 5.0f);
	view.layer.shadowOpacity = 1.0f;
	view.layer.shadowPath = shadowPath.CGPath;

DonMag

let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "HH:mm a"
let date = dateFormatter.dateFromString("11:42 am")

DonMag

Interesting behavior (bug?) in Xcode / IB....  

1) Create new Single View project...
2) Add a couple objects to the default ViewController in Main.storyboard...
3) Add a new Storyboard via File -> New -> File -> Storyboard... 
4) Back in Main.storyboard, select either View Controller or View Controller Scene...
5) Select Edit -> Copy (or just cmd+C)
6) In the new Storyboard, try to Paste -- can't do it...
7) Drag a ViewController to the new Storyboard...
8) Now try to Paste -- it works!