Determine if there is no network

Source: Internet
Author: User

#import "RootViewController.h"

Add header File
#import "Reachability.h"

@interface Rootviewcontroller ()


@implementation Rootviewcontroller

-(ID) Initwithnibname: (NSString *) Nibnameornil Bundle: (NSBundle *) Nibbundleornil
self = [super Initwithnibname:nibnameornil Bundle:nibbundleornil];
if (self) {
Custom initialization
return self;

-(void) viewdidload
[Super Viewdidload];
Do any additional setup after loading the view.

if ([self isconnectionavailable]) {

Uialertview *alert=[[uialertview alloc]initwithtitle:@ "Reminder" message:@ "Network is connected, please resend" delegate:self cancelbuttontitle:@ "Cancel" otherbuttontitles:@ "OK", nil];
[Alert show];

Determine if the network is connected.
-(BOOL) isconnectionavailable{

BOOL isexistencenetwork = YES;
reachability *reach = [reachability reachabilitywithhostname:@ ""];
switch ([reach Currentreachabilitystatus]) {
Case Notreachable:
Isexistencenetwork = NO;
NSLog (@ "notreachable");
Case Reachableviawifi:
Isexistencenetwork = YES;
NSLog (@ "WIFI");
Case Reachableviawwan:
Isexistencenetwork = YES;
NSLog (@ "3G");
if (!isexistencenetwork) {

Uialertview *alert=[[uialertview alloc]initwithtitle:@ "Reminder" message:@ "network is not connected, please resend" delegate:self cancelbuttontitle:@ "Cancel" otherbuttontitles:@ "OK", nil];
[Alert show];
return isexistencenetwork;

Determine if there is no network

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.