Super Dump

Brain dump of iOS, Swift, and Xcode troubleshooting fixes

[chenr2-blog]

Hide the tableview separator

Set the separator to None on the TableView itself.

[chenr2-blog]

Close a modal

Should be obvious, but here it is:

dismissViewControllerAnimated(true, completion: {})

[chenr2-blog]

Disable bounce on UIPageViewController

See http://stackoverflow.com/questions/21798218/disable-uipageviewcontroller-bounce

UIPageViewController doesn't expose the bounces flag, nor its own scrollview. So you sort of have to reach inside and get a handle of the scrollview and set its bounces to false

for subView in view.subviews { if let scrollViewSubView = subView as? UIScrollView { scrollViewSubView.bounces = false } }

[chenr2-blog]

Dismiss the keyboard

Just add this to dismiss the keyboard

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) { self.view.endEditing(true) }

This may not work on a tableView, because it's obscuring the entire view. You will need to call endEditing within your didSelectRow method.

[chenr2-blog]

Keyboard looks kind of big

You’re missing a launch image.  The device scales up the iPhone 5/s 4-inch screen to fit the iPhone 6 (4.7-inch) and iPhone 6+ (5.5-inch) screens.  The keyboard gets scaled up too.

Just add a launch image for each device form factor.  Don’t forget to check your 3x iPhone 6 image assets.

http://stackoverflow.com/questions/28918938/why-do-iphone-6-plus-keyboards-look-different-on-my-app

[chenr2-blog]

Map Clustering with Swift

There’s a library for this:

http://ribl.co/blog/2015/05/28/map-clustering-with-swift-how-we-implemented-it-into-the-ribl-ios-app/

[chenr2-blog]

How do I detect hashtags and mentions

There’s a tutorial for that.

http://www.thorntech.com/2015/06/detecting-hashtags-mentions-and-urls-with-swift/

[chenr2-blog]

A good tutorial on slideout menus

Tutorial on left slideout menu with tab bar controller

http://www.thorntech.com/2015/06/want-to-implement-a-slideout-menu-in-your-swift-app-heres-how/

[chenr2-blog]

A good tutorial on table views

Get started here.

http://www.thorntech.com/2015/06/intro-to-uitableview-in-swift/

[chenr2-blog]

How can I find free icons?

Your first stop should be font awesome.  You can use unicode text, which means you get vector scaling and the ability to set the color for free.

Tutorial on incorporating font awesome into a Swift project

http://www.clearlyinnovative.com/use-font-awesome-swift/

[chenr2-blog]

Tab Bar translucent bug

This happens on iOS 7 devices when you back into a tab bar from a detail page.  Bug does not happen on simulator, nor on iOS 8.

This is a bug with iOS 7.  Your workaround is to set a white background color on the Tab Bar:

http://stackoverflow.com/questions/22327646/tab-bar-background-is-missing-on-ios-7-1-after-presenting-and-dismissing-a-view

[chenr2-blog]

Action Sheet is messed up on iOS 7

Sometimes the UIActionSheet shows up slightly off-screen

Just replace this:

myActionSheet.showInView(self.view)

With this:

myActionSheet.showInView(UIApplication.sharedApplication().keyWindow)

[chenr2-blog]

Can’t make an Outlet on the Storyboard

Xcode won’t let me create an Outlet. I’ve tried restarting, and doing a clean, to no avail.

Could not insert new outlet connection: Could not find any information for the class named ...

The problem is that the Xcode state is corrupted. Quit Xcode, and delete the state:

cd ~/Library/Developer/Xcode/DerivedData/ rm -rf myTestProject-dakxkknkbfuocigqfvhlazthlnjs

[chenr2-blog]

How to drop a pin on the map

Assume someCoordinate is a CLLocationCoordinate2D

var dropPin = MKPointAnnotation() dropPin.coordinate = someCoordinate mapView.addAnnotation(dropPin)

[chenr2-blog]

How to add a shadow to a view

On the Storyboard Identity Inspector, add a Runtime Attribute

[chenr2-blog]

How to remove all map annotations

Short and sweet.

mapView.removeAnnotations(mapView.annotations)

[chenr2-blog]

Animate a constraint

Constraint changes normally happen immediately. You can animate them with animateWithDuration, and calling layoutIfNeeded in the animation block.

myConstraint.constant = 60 UIView.animateWithDuration(0.5, delay: 0.0, options: .CurveEaseInOut, animations: { self.view.layoutIfNeeded() }, completion: nil )