我在 MapKit 上使用自定义标记
如何更改自定义标记上的图像宽度和高度?
我的代码:
func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {
if (annotation is MKUserLocation) {
return nil
}
let reuseId = "test"
var anView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId)
if anView == nil {
anView = MKAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
anView.image = UIImage(named:"x2.png")
anView.canShowCallout = true
}
else {
anView.annotation = annotation
}
return anView
}
Run Code Online (Sandbox Code Playgroud) 我在 Swift 中的位置有问题。
在模拟器上工作正常但在设备上不起作用
我使用模拟器 iPhone 6 iOS 8.3 和设备 iPhone 6 iOS 8.3
我的代码:
import UIKit
import CoreLocation
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate,
CLLocationManagerDelegate {
var window: UIWindow?
var locationManager: CLLocationManager! = nil
var isExecutingInBackground = false
func locationManager(manager: CLLocationManager!,
didUpdateToLocation newLocation: CLLocation!,
fromLocation oldLocation: CLLocation!){
if isExecutingInBackground{
println(newLocation);
locationManager.stopUpdatingLocation()
} else {
/* We are in the foreground. Do any processing that you wish */
}
}
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
{
locationManager …Run Code Online (Sandbox Code Playgroud) 我真的很需要帮助
我将图像保存到 DocumentDirectory 如何获取此图像并放入 UIImageView?
照片网址:
file:///Users/zoop/Library/Developer/CoreSimulator/Devices/3E9FA5C0-3III-41D3-A6D7-A25FF3424351/data/Containers/Data/Application/7C4D9316-5EB7-4A70-82DC-E76C654sEA20profile
如何在swift中将十六进制转换为十进制?
我有字符串"423fdf4dfb1115",我需要得到这个=> 18647576781459733.
我试试这个:
let result = UInt8(strtoul("423fdf4dfb1115", nil, 16))
Run Code Online (Sandbox Code Playgroud)
但是app崩溃......
我使用这个在线转换:http: //www.binaryhexconverter.com/hex-to-decimal-converter