Reachability/APLViewController.m
/* |
Copyright (C) 2016 Apple Inc. All Rights Reserved. |
See LICENSE.txt for this sample’s licensing information |
Abstract: |
Application delegate class. |
*/ |
#import "APLViewController.h" |
#import "Reachability.h" |
@interface APLViewController () |
@property (nonatomic, weak) IBOutlet UILabel* summaryLabel; |
@property (nonatomic, weak) IBOutlet UITextField *remoteHostLabel; |
@property (nonatomic, weak) IBOutlet UIImageView *remoteHostImageView; |
@property (nonatomic, weak) IBOutlet UITextField *remoteHostStatusField; |
@property (nonatomic, weak) IBOutlet UIImageView *internetConnectionImageView; |
@property (nonatomic, weak) IBOutlet UITextField *internetConnectionStatusField; |
@property (nonatomic) Reachability *hostReachability; |
@property (nonatomic) Reachability *internetReachability; |
@end |
@implementation APLViewController |
- (void)viewDidLoad |
{ |
[super viewDidLoad]; |
self.summaryLabel.hidden = YES; |
/* |
Observe the kNetworkReachabilityChangedNotification. When that notification is posted, the method reachabilityChanged will be called. |
*/ |
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil]; |
//Change the host name here to change the server you want to monitor. |
NSString *remoteHostName = @"www.apple.com"; |
NSString *remoteHostLabelFormatString = NSLocalizedString(@"Remote Host: %@", @"Remote host label format string"); |
self.remoteHostLabel.text = [NSString stringWithFormat:remoteHostLabelFormatString, remoteHostName]; |
self.hostReachability = [Reachability reachabilityWithHostName:remoteHostName]; |
[self.hostReachability startNotifier]; |
[self updateInterfaceWithReachability:self.hostReachability]; |
self.internetReachability = [Reachability reachabilityForInternetConnection]; |
[self.internetReachability startNotifier]; |
[self updateInterfaceWithReachability:self.internetReachability]; |
} |
/*! |
* Called by Reachability whenever status changes. |
*/ |
- (void) reachabilityChanged:(NSNotification *)note |
{ |
Reachability* curReach = [note object]; |
NSParameterAssert([curReach isKindOfClass:[Reachability class]]); |
[self updateInterfaceWithReachability:curReach]; |
} |
- (void)updateInterfaceWithReachability:(Reachability *)reachability |
{ |
if (reachability == self.hostReachability) |
{ |
[self configureTextField:self.remoteHostStatusField imageView:self.remoteHostImageView reachability:reachability]; |
NetworkStatus netStatus = [reachability currentReachabilityStatus]; |
BOOL connectionRequired = [reachability connectionRequired]; |
self.summaryLabel.hidden = (netStatus != ReachableViaWWAN); |
NSString* baseLabelText = @""; |
if (connectionRequired) |
{ |
baseLabelText = NSLocalizedString(@"Cellular data network is available.\nInternet traffic will be routed through it after a connection is established.", @"Reachability text if a connection is required"); |
} |
else |
{ |
baseLabelText = NSLocalizedString(@"Cellular data network is active.\nInternet traffic will be routed through it.", @"Reachability text if a connection is not required"); |
} |
self.summaryLabel.text = baseLabelText; |
} |
if (reachability == self.internetReachability) |
{ |
[self configureTextField:self.internetConnectionStatusField imageView:self.internetConnectionImageView reachability:reachability]; |
} |
} |
- (void)configureTextField:(UITextField *)textField imageView:(UIImageView *)imageView reachability:(Reachability *)reachability |
{ |
NetworkStatus netStatus = [reachability currentReachabilityStatus]; |
BOOL connectionRequired = [reachability connectionRequired]; |
NSString* statusString = @""; |
switch (netStatus) |
{ |
case NotReachable: { |
statusString = NSLocalizedString(@"Access Not Available", @"Text field text for access is not available"); |
imageView.image = [UIImage imageNamed:@"stop-32.png"] ; |
/* |
Minor interface detail- connectionRequired may return YES even when the host is unreachable. We cover that up here... |
*/ |
connectionRequired = NO; |
break; |
} |
case ReachableViaWWAN: { |
statusString = NSLocalizedString(@"Reachable WWAN", @""); |
imageView.image = [UIImage imageNamed:@"WWAN5.png"]; |
break; |
} |
case ReachableViaWiFi: { |
statusString= NSLocalizedString(@"Reachable WiFi", @""); |
imageView.image = [UIImage imageNamed:@"Airport.png"]; |
break; |
} |
} |
if (connectionRequired) |
{ |
NSString *connectionRequiredFormatString = NSLocalizedString(@"%@, Connection Required", @"Concatenation of status string with connection requirement"); |
statusString= [NSString stringWithFormat:connectionRequiredFormatString, statusString]; |
} |
textField.text= statusString; |
} |
- (void)dealloc |
{ |
[[NSNotificationCenter defaultCenter] removeObserver:self name:kReachabilityChangedNotification object:nil]; |
} |
@end |
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