Author: Chris Lattner
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import Foundation | |
import SystemConfiguration.CaptiveNetwork | |
func getWiFiSsid() -> String? { | |
var ssid: String? | |
if let interfaces = CNCopySupportedInterfaces() as NSArray? { | |
for interface in interfaces { | |
if let interfaceInfo = CNCopyCurrentNetworkInfo(interface as! CFString) as NSDictionary? { | |
ssid = interfaceInfo[kCNNetworkInfoKeySSID as String] as? String | |
break |
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import Darwin | |
@dynamicMemberLookup | |
struct Environment { | |
subscript(dynamicMember name: String) -> String? { | |
get { | |
guard let value = getenv(name) else { return nil } | |
return String(validatingUTF8: value) | |
} |
If you use server rendering, keep in mind that neither useLayoutEffect
nor useEffect
can run until the JavaScript is downloaded.
You might see a warning if you try to useLayoutEffect
on the server. Here's two common ways to fix it.
If this effect isn't important for first render (i.e. if the UI still looks valid before it runs), then useEffect
instead.
function MyComponent() {