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udemy ios10

L12 mapView

override func viewDidLoad() {
super.viewDidLoad()

mapView.delegate = self
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestWhenInUseAuthorization()
locationManager.startUpdatingLocation()
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

let location = CLLocationCoordinate2DMake(locations[0].coordinate.latitude, locations[0].coordinate.longitude)
let span = MKCoordinateSpan(latitudeDelta: 0.05, longitudeDelta: 0.05)
let region = MKCoordinateRegion(center: location, span: span)
self.mapView.setRegion(region, animated: true)
}

導航模式 ViewController
    func mapView(_ mapView: MKMapView, annotationView view: MKAnnotationView, calloutAccessoryControlTapped control: UIControl) {
        if transmittedLatitude != 0{
            if transmittedLongitude != 0{
                self.requestCLLocation = CLLocation(latitude: transmittedLatitude, longitude: transmittedLongitude)
            }
        }
        CLGeocoder().reverseGeocodeLocation(requestCLLocation) { (placemarks, error) in
            if let placemark = placemarks{
                if placemark .count > 0 {
                    let newPlaceMark = MKPlacemark(placemark: placemark[0])
                    let item = MKMapItem(placemark: newPlaceMark)
                    item.name = self.transmittedTitle
                    //選擇啟用導航時的選項
                    let lanuchOptions = [MKLaunchOptionsDirectionsModeKey : MKLaunchOptionsDirectionsModeWalking]
                    item.openInMaps(launchOptions: lanuchOptions)
                }
            }
        }

    }

 L110 客製化鍵盤

 L113 JSON Fetch
新課程，但error handling還沒有做好，有反應，待最佳解 

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collection view part6 swift

preselect collectionview https://stackoverflow.com/questions/45610785/how-to-preselect-and-highlight-a-cell-from-a-uicollectionview https://hackernoon.com/uicollectionviewcell-selection-made-easy-41dae148379d if collectionview allow multiple selection remeber add this, cell item could be Deselect collectionView. selectItem (at: indexPath, animated: true , scrollPosition: . top ) https://stackoverflow.com/questions/15330844/uicollectionview-select-and-deselect-issue save indexpath userdefault https://stackoverflow.com/questions/34804294/how-to-save-nsindexpath-locally https://stackoverflow.com/questions/37001643/how-to-add-nsindexpath-to-nsuserdefaults-in-swift navigation presneted viewcontroller dismiss https://stackoverflow.com/questions/31205002/why-is-it-bad-practice-to-have-a-viewcontroller-dismiss-itself indexpath comparison         if selectIndexPath . contains (indexPath) {             cell. isSelect...
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collection view part3 swift

make random color for test, i put in cell background color watch diff https://stackoverflow.com/questions/29779128/how-to-make-a-random-color-with-swift because use CYlayer, i have to remove layer https://stackoverflow.com/questions/10789766/remove-all-sublayers-from-a-view https://stackoverflow.com/questions/37581951/ios-how-to-remove-previously-added-sublayers-of-a-uiview/37581988 alpha gradint with imageview https://stackoverflow.com/questions/11807876/transparent-alpha-gradient-with-core-graphic-iphone swift map and flatmap http://swiftcafe.io/2016/03/28/about-map/ get local date and time https://stackoverflow.com/questions/28404154/swift-get-local-date-and-time swift dictionary basic https://stackoverflow.com/questions/27313242/how-to-append-elements-into-dictionary-in-swift add 1 day to NSDate https://stackoverflow.com/questions/5067785/how-do-i-add-1-day-to-an-nsdate get keys from dictionay https://stackoverflow.com/questions/26386093/array-from-dictionary...
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js30 d27 drag跑馬燈

https://github.com/richardhsieh18/js30/tree/master/course27 CSS transform: scale(0.98);  =>  transform: scale(1); js     isDown = true;     slider.classList.add('active');     startX = e.pageX - slider.offsetLeft;     scrollLeft = slider.scrollLeft;   });     if(!isDown) return; //stop the function from running     e.preventDefault();     const x = e.pageX - slider.offsetLeft;     const walk = (x - startX) * 3;     slider.scrollLeft = scrollLeft - walk;   });
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