添加SystemConfiguration.framework 到工程中
对应的.h文件
#import <UIKit/UIKit.h> @interface ViewController : UIViewController //如果方法前面加+,就相当于类的静态方法,这里要注意一下 - (BOOL) connectedToNetwork; @end
对应的.m文件
#import "ViewController.h" #import <Foundation/Foundation.h> #import <CommonCrypto/CommonHMAC.h> #import <SystemConfiguration/SystemConfiguration.h> #import <netdb.h> #import <arpa/inet.h> @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; UIButton *btn = [[UIButton alloc]init]; btn.frame = CGRectMake(20, 20, 40, 40); btn.backgroundColor = [UIColor brownColor]; [self.view addSubview:btn]; [btn addTarget:self action:@selector(testOut:) forControlEvents:UIControlEventTouchUpInside]; // Do any additional setup after loading the view, typically from a nib. } -(BOOL) connectedToNetwork { // Create zero addy struct sockaddr_in zeroAddress; bzero(&zeroAddress, sizeof(zeroAddress)); zeroAddress.sin_len = sizeof(zeroAddress); zeroAddress.sin_family = AF_INET; // Recover reachability flags SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress); SCNetworkReachabilityFlags flags; BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags); CFRelease(defaultRouteReachability); if (!didRetrieveFlags) { printf("Error. Could not recover network reachability flags\n"); return NO; } BOOL isReachable = ((flags & kSCNetworkFlagsReachable) != 0); BOOL needsConnection = ((flags & kSCNetworkFlagsConnectionRequired) != 0); return (isReachable && !needsConnection) ? YES : NO; } //在调用的时候,在对应的按钮中加入判断: - (IBAction)testOut:(UIButton *)sender { if(![self connectedToNetwork]) { UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"温馨提示" message:@"网络连接失败,请查看网络是否连接正常!" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; } NSLog(@"testOut Event"); } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
时间: 2024-10-10 13:19:46