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Instant Gratificationin Interface Builder
Making Views
Where’s the subview?
See Constraints
Show Bounds
Playgrounds
IBDesignable
See your view live in Interface Builder
Tweak your view live in Interface Builder
What’s in it for me?
DRY
DRY
(Insert Seattle joke here)
DRY
(Insert Seattle joke here)
☂
MVC
MVC
⌘-R
self.borderWidth = 10;
Build & Run. Get to screen.
Observe Cool UI.
self.borderWidth = 20;
Build & Run. Get to screen.
Observe Cool UI.
self.borderWidth = 15;
Build & Run. Get to screen.
Observe Cool UI.
Repeat
Repeat ad nauseam
Case Study
All Places
Single Place
Single PlaceAll Places
Place Map
Practical Application
From Zero to VisibleDemo
IBInspectable
IBInspectable Properties• Boolean
• Integer / Float
• String / Localized String
• CGRect CGPoint CGSize
• Color
• Range
• Nil
Update LiveDemo
Problems
Problems and Solutions
NSFont・UIFont
Debugging / Logging
public func liveDebugLog(message: String) { #if !(TARGET_OS_IPHONE) // ENSURE LOG FILE EXISTS let logPath = "/tmp/XcodeLiveRendering.log" let fm = NSFileManager.createIfNecessary(logPath) // GET FILE HANDLE var fileHandle = NSFileHandle(forWritingAtPath: logPath)! fileHandle.seekToEndOfFile() // WRITE OUT LOG let data = message.asUTF8Data fileHandle.writeData(data)
#endif
}
CocoaPods
$ gem update cocoapods
# build for all architectures post_install do |installer| installer.project.targets.each do |target| target.build_configurations.each do |config| config.build_settings['ONLY_ACTIVE_ARCH'] = 'NO' end end end
Can’t drag and drop from subview UIControls to
create IBActions
videoControlsView?.playButton.addTarget(self,
action: Selector("tappedPlayButton"),
forControlEvents: UIControlEvents.TouchUpInside)
Use Target-Action
IBInspectable properties of subviews aren’t
exposed.
Preemptive Q&A
Do I have to use a separate framework?
No
Does this work in Objective-C?
Yes
Can I do my view layout in Interface Builder?
Probably
http://justabeech.com/2014/07/27/xcode-6-live-rendering-from-nib/
Resources
Debugging
Using Assets
Apple Docs
https://developer.apple.com/library/ios/recipes/xcode_help-IB_objects_media/chapters/
CreatingaLiveViewofaCustomObject.html
@MartinJNash Seattle
