有WiFi网络更改的NSNotificationCenter通知吗? [英] Is there a NSNotificationCenter Notification for WiFi network changes?
本文介绍了有WiFi网络更改的NSNotificationCenter通知吗?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想订阅我的Cocoa应用程式中的WiFi网路变更,但我无法找到合适的活动来订阅。
I'd like to subscribe to WiFi network changes in my Cocoa application, but I haven't been able to find an appropriate event to subscribe to.
有没有针对WiFi网络更改的NSNotificationCenter通知?
Is there an NSNotificationCenter Notification for WiFi network changes?
推荐答案
我将使用 CoreWLAN 获取列表所有WiFi接口,然后使用 SystemConfiguration 框架。
Not to my knowledge. I would use CoreWLAN to get a list of all WiFi interfaces on the system, and then monitor their status using the SystemConfiguration framework.
这是一个命令行示例(错误检查nicards elided,ARC required):
Here's a command-line example (error checking niceties elided, ARC required):
#import <Foundation/Foundation.h>
#import <CoreWLAN/CoreWLAN.h>
#import <SystemConfiguration/SystemConfiguration.h>
void wifi_network_changed(SCDynamicStoreRef store, CFArrayRef changedKeys, void *ctx)
{
[(__bridge NSArray *)changedKeys enumerateObjectsUsingBlock:^(NSString *key, NSUInteger idx, BOOL *stop)
{
/* Extract the interface name from the changed key */
NSString *ifName = [key componentsSeparatedByString:@"/"][3];
CWInterface *iface = [CWInterface interfaceWithName:ifName];
NSLog(@"%@ status changed: current ssid is %@, security is %ld",
ifName, iface.ssid, iface.security);
}];
}
int main(int argc, char *argv[])
{
/* Get a list of all wifi interfaces, and build an array of SCDynamicStore keys to monitor */
NSSet *wifiInterfaces = [CWInterface interfaceNames];
NSMutableArray *scKeys = [[NSMutableArray alloc] init];
[wifiInterfaces enumerateObjectsUsingBlock:^(NSString *ifName, BOOL *stop)
{
[scKeys addObject:
[NSString stringWithFormat:@"State:/Network/Interface/%@/AirPort", ifName]];
}];
/* Connect to the dynamic store */
SCDynamicStoreContext ctx = { 0, NULL, NULL, NULL, NULL };
SCDynamicStoreRef store = SCDynamicStoreCreate(kCFAllocatorDefault,
CFSTR("myapp"),
wifi_network_changed,
&ctx);
/* Start monitoring */
SCDynamicStoreSetNotificationKeys(store,
(__bridge CFArrayRef)scKeys,
NULL);
CFRunLoopSourceRef src = SCDynamicStoreCreateRunLoopSource(kCFAllocatorDefault, store, 0);
CFRunLoopAddSource([[NSRunLoop currentRunLoop] getCFRunLoop],
src,
kCFRunLoopCommonModes);
[[NSRunLoop currentRunLoop] run];
}
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