How to use [CWWiFiClient startMonitoringEventWithType:error:] to get SSID change notification

Question

我试图在网络为 changed.For 时在我的 OS X 机器中收到通知，这是我添加的 coreWLAN.framewok。在那里我找到了一种方法

/*!   
 * @method  
 * 
 * @param interfaceName  
 * The name of the Wi-Fi interface.   
 *   
 * @abstract
 * Invoked when the current SSID changes.                                   
 *   
 * @discussion   
 * Use -[CWWiFiClient startMonitoringEventWithType:error:] with the CWEventTypeSSIDDidChange event type   
 * to register for SSID event notifications.    
 * Use -[CWInterface ssidData] or -[CWInterface ssid] to query the current SSID.
 */   
- (void)ssidDidChangeForWiFiInterfaceWithName:(NSString *)interfaceName;

但我不知道如何使用它。请在这里发表评论

Answer 1

这与您在上面想要实现的工作相同。它会在 SSID 更改时通知您

为了获得这些通知，您需要保留 CWInterface 的一个实例。你的 .h 看起来像这样

#import <Cocoa/Cocoa.h>
@class CWInterface;

@interface AppDelegate : NSObject <NSApplicationDelegate>

@property (assign) IBOutlet NSWindow *window;
@property (retain) CWInterface *wirelessInterface;

@end

然后在您的 .m 文件中将如下所示

#import "AppDelegate.h"
#import <CoreWLAN/CoreWLAN.h>

@implementation AppDelegate

@synthesize window = _window;
@synthesize wirelessInterface;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    // Insert code here to initialize your application

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:CWModeDidChangeNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:CWSSIDDidChangeNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:CWBSSIDDidChangeNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:CWCountryCodeDidChangeNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:CWLinkDidChangeNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:CWPowerDidChangeNotification object:nil];

    self.wirelessInterface = [CWInterface interfaceWithName:@"en1"];
}

-(void) handleNotification:(NSNotification*) notification
{
    NSLog(@"Notification Received");
}

@结束使用接口名称 en1 或 en0 时要小心。通过给 ifconfig

查看存在哪个接口 ip 来检查您的系统

How to use [CWWiFiClient startMonitoringEventWithType:error:] to get SSID change notification

How to use [CWWiFiClient startMonitoringEventWithType:error:] to get SSID change notification

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