iOS - 可达性 isReachable 不起作用
<p><p>我正在使用这个库:<a href="https://github.com/tonymillion/Reachability" rel="noreferrer noopener nofollow">https://github.com/tonymillion/Reachability</a> </p>
<p>有时当我检查以下表达式时会出现问题:
<code>[[reachability] isReachable];</code> 在应该为 <code>YES</code> 时返回 <code>NO</code>。我知道有互联网,因为我同时调用了 Rest 服务。 </p>
<p>另外,如果我执行 <code>;</code> 并请求方法 <code>isReachable</code> 则可以按预期工作。</p>
<p>我的测试很简单,在模拟器上试一下,然后插拔网线。</p>
<pre><code>@implementation ReachabilityManager
#pragma mark -
#pragma mark Default Manager
+ (ReachabilityManager *)sharedManager {
static ReachabilityManager *_sharedManager = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_sharedManager = [ init];
});
return _sharedManager;
}
#pragma mark -
#pragma mark Memory Management
- (void)dealloc {
// Stop Notifier
if (_reachability) {
;
}
}
#pragma mark -
#pragma mark Class Methods
+ (BOOL)isReachable {
return [[ reachability] isReachable];
}
+ (BOOL)isUnreachable {
return ![[ reachability] isReachable];
}
+ (BOOL)isReachableViaWWAN {
return [[ reachability] isReachableViaWWAN];
}
+ (BOOL)isReachableViaWiFi {
return [[ reachability] isReachableViaWiFi];
}
#pragma mark -
#pragma mark Private Initialization
- (id)init {
self = ;
if (self) {
// Initialize Reachability
self.reachability = ;
// Start Monitoring
;
}
return self;
}
@end
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><pre><code>@property (nonatomic) Reachability *hostReachability;
@property (nonatomic) Reachability *internetReachability;
@property (nonatomic) Reachability *wifiReachability;
</code></pre>
<p>声明一个 bool 值,</p>
<pre><code>BOOL _isInternetAvaliable;
</code></pre>
<p>初始化您的可达性,</p>
<pre><code>-(void) initializeReachability {
[ addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil];
//hostReachability
NSString *remoteHostName = @"www.apple.com";
self.hostReachability = ;
;
;
//internetReachability
self.internetReachability = ;
;
;
//wifiReachability
self.wifiReachability = ;
;
;
}
- (void)updateInterfaceWithReachability:(Reachability *)reachability
{
if (reachability == self.hostReachability)
{
;
}
if (reachability == self.internetReachability)
{
;
}
if (reachability == self.wifiReachability)
{
;
}
}
- (void)configurereachability:(Reachability *)reachability
{
NetworkStatus netStatus = ;
BOOL connectionRequired = ;
switch (netStatus)
{
case NotReachable: {
_isInternetAvaliable = NO;
break;
}
case ReachableViaWWAN: {
_isInternetAvaliable = YES;
break;
}
case ReachableViaWiFi: {
_isInternetAvaliable = YES;
break;
}
}
if (connectionRequired)
{
_isInternetAvaliable = NO;
}
}
-(BOOL) isInternetAvailable {
return _isInternetAvaliable;
}
</code></pre>
<p>现在您可以调用电话和访问互联网状态了,</p>
<pre><code>if([ isInternetAvailable]){
//Internet on
}
</code></pre></p>
<p style="font-size: 20px;">关于iOS - 可达性 isReachable 不起作用,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/42203724/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/42203724/
</a>
</p>
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