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- (void)fixTitleAndImageInsetsForButton:(UIButton *)btn {
	
	// the space between the image and text
	CGFloat spacing = 6.0;
	
	// lower the text and push it left so it appears centered
	//  below the image
	CGSize imageSize = btn.imageView.image.size;
	btn.titleEdgeInsets = UIEdgeInsetsMake(0.0, - imageSize.width, - (imageSize.height + spacing), 0.0);
	

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either:

1. in viewWillAppear:
[self.navigationController.view layoutSubviews];

or

2. in viewDidLoad:
self.navigationController.navigationBar.translucent = NO;

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//
//  NSURLSession+CancelTasks.h
//  Networking
//
//  Created by sudeep on 31/03/15.
//  Copyright (c) 2015 Sudeep Jaiswal. All rights reserved.
//

@import Foundation;

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// reactive cocoa
http://www.raywenderlich.com/62699/reactivecocoa-tutorial-pt1


// tutorials
http://chrisrisner.com/31-Days-of-iOS


// autolayout
http://angelovillegas.com/2014/01/31/ios-nslayoutconstraint

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[[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil];

[self.view endEditing:YES];

[self.view.window endEditing:YES];

// source: http://stackoverflow.com/questions/1823317/get-the-current-first-responder-without-using-a-private-api

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NSString *searchQuery = searchController.searchBar.text;
NSString *strippedString = [searchQuery stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

NSExpression *lhs = [NSExpression expressionForKeyPath:@"name"];
NSExpression *rhs = [NSExpression expressionForConstantValue:strippedString];
NSPredicate *searchPredicate = [NSComparisonPredicate
                                predicateWithLeftExpression:lhs
                                rightExpression:rhs
                                modifier:NSDirectPredicateModifier
                                type:NSContainsPredicateOperatorType

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in build phases ---> compile sources:

- navigate to the file(s) you want to disable arc on
- add to their compiler flags; '-fno-objc-arc'

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1. sudo gem install cocoapods // install command line tool (do this just once)

2. pod setup // clones the pod repo locally (do this just once)

3. in a project folder, 'pod init' // creates a podfile

4. in the podfile, add pod names, eg: pod 'AFNetworking'

5. in the project folder on terminal, 'pod install'

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occurs due to compiler optimisation settings:

build settings ---> apple llvm 6.0 - code generation

or just search for "optimization"

the issue lies in "optimization level". testflight builds use the "release" configuration which uses a different level than our usual debug.

solutions:

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[self.view layoutIfNeeded]; // always call on self.view
_constraintObject.constant = 44; // change the constraint value
[UIView animateWithDuration:0.25
				animations:^{
					[self.view layoutIfNeeded]; // call again to update the layout
				}];

sources:
http://stackoverflow.com/questions/12622424/how-do-i-animate-constraint-changes
http://stackoverflow.com/questions/22086054/unable-to-make-outlet-connection-to-a-constraint-in-ib