我很难在我的代码中使用可达性。我想通过在启动时启动观察者然后只接收更改通知来保持它非常简单。在以下代码中,从不调用reachabilityChanged 方法。我尝试了很多迭代,但这是最简单的版本。它编译并运行。请帮忙...
** * * AppDelegate.h 代码* ** *
#import <UIKit/UIKit.h>
#ifdef PHONEGAP_FRAMEWORK
#import <PhoneGap/PGViewController.h>
#import <PhoneGap/PGURLProtocol.h>
#import <PhoneGap/Reachability.h>
#else
#import "PGViewController.h"
#import "PGURLProtocol.h"
#import "Reachability.h"
#endif
@interface AppDelegate : NSObject < UIApplicationDelegate, UIWebViewDelegate, PGCommandDelegate> {
NSString* invokeString;
}
@property (nonatomic, copy) NSString* invokeString;
@property (nonatomic, strong) IBOutlet UIWindow* window;
@property (nonatomic, strong) IBOutlet PGViewController* viewController;
@end
** * * AppDelegate.m 代码片段* ** *
#import "AppDelegate.h"
#import "MainViewController.h"
#ifdef PHONEGAP_FRAMEWORK
#import <PhoneGap/PGPlugin.h>
#import <PhoneGap/PGURLProtocol.h>
#import <PhoneGap/Reachability.h>
#else
#import "PGPlugin.h"
#import "PGURLProtocol.h"
#import "Reachability.h"
#endif
@implementation AppDelegate
@synthesize invokeString, window, viewController;
- (void) reachabilityChanged:(NSNotification *)notice
{
NSLog(@"???????? CODE NEVER GETS HERE ??????????");
Reachability *reach = [notice object];
NSParameterAssert([reach isKindOfClass: [Reachability class]]);
NetworkStatus remoteHostStatus = [reach currentReachabilityStatus];
if(remoteHostStatus == NotReachable) {NSLog(@"**** Not Reachable ****");}
else if (remoteHostStatus == ReachableViaWiFi) {NSLog(@"**** wifi ****"); }
else if (remoteHostStatus == ReachableViaWWAN) {NSLog(@"**** cell ****"); }
}
- (BOOL) application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil];
Reachability *reach = [Reachability reachabilityForInternetConnection];
[reach startNotifier];
NetworkStatus remoteHostStatus = [reach currentReachabilityStatus];
NSLog(@”???? ALWAYS INITS WITH Not Reachable ????”);
if(remoteHostStatus == NotReachable) {NSLog(@"init **** Not Reachable ****");}
else if (remoteHostStatus == ReachableViaWiFi) {NSLog(@"int **** wifi ****"); }
else if (remoteHostStatus == ReachableViaWWAN) {NSLog(@"init **** cell ****"); }
// ...
}
@end