AsyncUdpSocket的简单应用和 fetchSSIDInfo 获取设备sid
- (id)fetchSSIDInfo
{
? ? NSArray *ifs = (__bridge id)CNCopySupportedInterfaces();
? ? NSLog(@"%s: Supported interfaces: %@", __func__, ifs);
? ? id info = nil;
? ? for (NSString *ifnam in ifs) {
? ? ? ? info = (__bridge id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
? ? ? ? if (info && [info count]) {
? ? ? ? ? ? break;
? ? ? ? }
? ? }
? ? return info ;
}
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用socket添加 两个文件 AsyncUdpSocket.h ?和 AsyncUdpSocket.m?
SystemControm.framework ? ?CFNetwork.framework
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#import "ViewController.h"
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#import <SystemConfiguration/CaptiveNetwork.h>
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@interfaceViewController ()
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@property(nonatomic,strong) AsyncUdpSocket *socket;
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@end
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@implementation ViewController
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- (void)viewDidLoad
{
? ? [superviewDidLoad];
? ? self.socket = [[AsyncUdpSocketalloc] initWithDelegate:self];
?? ?
? ? NSError *error = nil;
? ? [self.socket bindToPort:3000 error:&error];
? ? [self.socketenableBroadcast:YESerror:&error];
? ? [self.socketjoinMulticastGroup:@"239.255.255.250"error:&error];
?? ?
? ? if (error) {
? ? ? ? NSLog(@"error: %@",error);
? ? }
?? ?
? ? [self.socketreceiveWithTimeout:-1tag:1];
?? ?
? ? NSLog(@"start udp server");
?? ?
?? ?
? ? NSDictionary *ifs = [self fetchSSIDInfo]; //获取sid信息。
?? ?
? ? NSString *ssid = [[ifs objectForKey:@"SSID"] lowercaseString];
? ? NSLog(@"ssid：%@",ssid);
? ? _wifiName.text = [NSString stringWithFormat:@"Wifi name:\n%@",ssid];
}
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- (BOOL)onUdpSocket:(AsyncUdpSocket *)sock didReceiveData:(NSData *)data withTag:(long)tag fromHost:(NSString *)host port:(UInt16)port{
? ? NSString *receiveData = [[NSStringalloc] initWithData:data encoding:NSUTF8StringEncoding];
? ? NSLog(@"received data: %@",receiveData);
?? ?
? ? _data.text = [NSString stringWithFormat:@"Received data:\n%@",receiveData];
?? ?
? ? [self.socket receiveWithTimeout:-1 tag:1];
? ? returnYES;
}
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- (id)fetchSSIDInfo
{
? ? NSArray *ifs = (__bridge id)CNCopySupportedInterfaces();
? ? NSLog(@"%s: Supported interfaces: %@", __func__, ifs);
? ? id info = nil;
? ? for (NSString *ifnam in ifs) {
? ? ? ? info = (__bridge id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
? ? ? ? if (info && [info count]) {
? ? ? ? ? ? break;
? ? ? ? }
? ? }
? ? return info ;
}
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