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Swift UIViewController utils: custom status bar background color, popup alert message, ...
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| // | |
| // UIViewController+StatusBar.swift | |
| // Swift Extensions | |
| // | |
| import Foundation | |
| import UIKit | |
| /// Custom status bar background color on UIViewController | |
| extension UIViewController { | |
| public override class func initialize() { | |
| struct Static { | |
| static var token: dispatch_once_t = 0 | |
| } | |
| if self !== UIViewController.self { | |
| return | |
| } | |
| dispatch_once(&Static.token) { | |
| let originalSelector = Selector("viewDidLoad") | |
| let swizzledSelector = Selector("customViewDidLoad") | |
| let originalMethod = class_getInstanceMethod(self, originalSelector) | |
| let swizzledMethod = class_getInstanceMethod(self, swizzledSelector) | |
| let didAddMethod = class_addMethod(self, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod)) | |
| if didAddMethod { | |
| class_replaceMethod(self, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod)) | |
| } | |
| else { | |
| method_exchangeImplementations(originalMethod, swizzledMethod); | |
| } | |
| } | |
| } | |
| // MARK: - Method Swizzling | |
| func customViewDidLoad() { | |
| self.customViewDidLoad() | |
| // Hide navigation bar | |
| self.navigationController?.setNavigationBarHidden(true, animated: true) | |
| statusBarBackgroundColor(0x0b6e99) | |
| } | |
| // MARK: - Custom statusBar background color | |
| func statusBarBackgroundColor(color: Int) { | |
| let view = UIView(frame: | |
| CGRect(x: 0.0, y: 0.0, width: UIScreen.mainScreen().bounds.size.width, height: 20.0) | |
| ) | |
| view.backgroundColor = UIColor.init(hex: color) | |
| self.view.addSubview(view) | |
| } | |
| } | |
| /// Popup alert from view controller | |
| extension UIViewController { | |
| func showAlert(title: String, message: String, ok: String, cancel: String, | |
| cancelAction: CancelActionPerformed?, | |
| okAction: OkActionPerformed?, | |
| completion: AlertPerformed?) { | |
| let alertController = UIAlertController(title: title, message: message, preferredStyle: .Alert) | |
| if cancelAction != nil { | |
| let cancelAction = UIAlertAction(title: cancel, style: .Cancel) { (action) in | |
| if let a = cancelAction { | |
| a(action) | |
| } | |
| } | |
| alertController.addAction(cancelAction) | |
| } | |
| let OKAction = UIAlertAction(title: ok, style: .Default) { (action) in | |
| if let a = okAction { | |
| a(action) | |
| } | |
| } | |
| alertController.addAction(OKAction) | |
| self.presentViewController(alertController, animated: true) { | |
| if let a = completion { | |
| a() | |
| } | |
| } | |
| } | |
| func presentDefaultAlert(alertText: String?, subText: String?, dismissText: String) -> UIAlertController { | |
| let alert = UIAlertController(title: alertText, message: subText, preferredStyle: .Alert) | |
| let action = UIAlertAction(title: dismissText, style: UIAlertActionStyle.Default) { (action) -> Void in | |
| } | |
| alert.addAction(action) | |
| self.presentViewController(alert, animated: true, completion: .None) | |
| return alert | |
| } | |
| } |
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