我正在开发一个应用程序，允许用户使用 STTwitter 库查看公共 Twitter 提要（见下面的代码）
STTwitterAPI *twitter = [STTwitterAPI twitterAPIAppOnlyWithConsumerKey:@"**consumer key**"
consumerSecret:@"**consumer secret**"];
[twitter verifyCredentialsWithSuccessBlock:^(NSString *bearerToken) {
[twitter getUserTimelineWithScreenName:@"screenName"
successBlock:^(NSArray *statuses) {
NSLog(@"-- statuses: %@", statuses);
self.statuses = statuses;
[spinner stopAnimating];
[self.tableView reloadData];
} errorBlock:^(NSError *error) {
}];
} errorBlock:^(NSError *error) {
[spinner stopAnimating];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Network Access" message:@"Please Try Later." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
NSLog(@"error: %@", [error localizedDescription]);
NSLog(@"No Network");
}];
当我关闭笔记本电脑上的 wifi 时，应用程序进入错误块并且一切正常，用户会收到一条警告，提示连接不可用。
但是，当我使用需要登录的 wifi 热点（例如 bt openzone）时，当我重新打开 wifi 并且不登录（意味着我无法访问互联网）时，应用程序认为它可以访问互联网并且尝试访问 twitter api 并崩溃。
我尝试使用“可达性”来确定天气或互联网是否可用（见下文）
Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];
if (networkStatus == NotReachable) {
NSLog(@"There IS NO internet connection");
} else {
NSLog(@"There IS internet connection");
}
然而这并没有奏效。
苹果会因为这样的事情拒绝我的应用程序吗？
有没有办法阻止这种情况发生？
谢谢你的帮助 ：）
编辑
2014-01-22 08:58:02.268 SWIP[384:a0b] Reachability Flag Status: -R -----l- networkStatusForFlags
2014-01-22 08:58:02.268 SWIP[384:a0b] ***INTERNET AVAILABLE****
2014-01-22 08:58:11.090 SWIP[384:a0b] Reachability Flag Status: -R -----l- networkStatusForFlags
2014-01-22 08:58:11.091 SWIP[384:a0b] ***INTERNET AVAILABLE****
2014-01-22 08:58:17.295 SWIP[384:a0b] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<__NSCFString 0xbc47e00> valueForUndefinedKey:]: this class is not key value coding-compliant for the key token_type.'
*** First throw call stack:
(
0 CoreFoundation 0x029205e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x026a38b6 objc_exception_throw + 44
2 CoreFoundation 0x029b06a1 -[NSException raise] + 17
3 Foundation 0x023648ca -[NSObject(NSKeyValueCoding) valueForUndefinedKey:] + 282
4 Foundation 0x022d1921 _NSGetUsingKeyValueGetter + 81
5 Foundation 0x022d0f5b -[NSObject(NSKeyValueCoding) valueForKey:] + 260
6 SWIP 0x0000375f __65-[STTwitterAppOnly verifyCredentialsWithSuccessBlock:errorBlock:]_block_invoke + 191
7 SWIP 0x00005e8d __109-[STTwitterAppOnly postResource:baseURLString:parameters:useBasicAuth:progressBlock:successBlock:errorBlock:]_block_invoke156 + 173
8 SWIP 0x00037231 __121+[STHTTPRequest(STTwitter) twitterRequestWithURLString:stTwitterProgressBlock:stTwitterSuccessBlock:stTwitterErrorBlock:] _block_invoke48 + 449
9 SWIP 0x00046255 -[STHTTPRequest connectionDidFinishLoading:] + 517
10 Foundation 0x0246db59 ___NSURLConnectionDidFinishLoading_block_invoke + 40
11 Foundation 0x024043e1 __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke + 62
12 Foundation 0x0228ca6e -[NSURLConnectionInternalConnection invokeForDelegate:] + 119
13 Foundation 0x0228c9d6 -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 208
14 Foundation 0x0228c8e8 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 76
15 Foundation 0x0228cc98 _NSURLConnectionDidFinishLoading + 43
16 CFNetwork 0x00c78e6f ___ZN27URLConnectionClient_Classic26_delegate_didFinishLoadingEU13block_pointerFvvE_block_invoke + 111
17 CFNetwork 0x00c76bac ___ZN27URLConnectionClient_Classic18_withDelegateAsyncEPKcU13block_pointerFvP16_CFURLConnectionPK33CFURLConnectionClientCurrent_VMaxE_block_invoke_2 + 104
18 CFNetwork 0x00cc10ef ___ZNK17CoreSchedulingSet13_performAsyncEPKcU13block_pointerFvvE_block_invoke + 25
19 CoreFoundation 0x028c1d59 CFArrayApplyFunction + 57
20 CFNetwork 0x00be05af _ZN19RunloopBlockContext7performEv + 139
21 CFNetwork 0x00cc16d2 _ZThn16_N19RunloopBlockContext24multiplexerClientPerformEv + 20
22 CFNetwork 0x00be03dd _ZN17MultiplexerSource7performEv + 299
23 CFNetwork 0x00be01f2 _ZN17MultiplexerSource8_performEPv + 76
24 CoreFoundation 0x028a983f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
25 CoreFoundation 0x028a91cb __CFRunLoopDoSources0 + 235
26 CoreFoundation 0x028c629e __CFRunLoopRun + 910
27 CoreFoundation 0x028c5ac3 CFRunLoopRunSpecific + 467
28 CoreFoundation 0x028c58db CFRunLoopRunInMode + 123
29 GraphicsServices 0x0345c9e2 GSEventRunModal + 192
30 GraphicsServices 0x0345c809 GSEventRun + 104
31 UIKit 0x01411d3b UIApplicationMain + 1225
32 SWIP 0x0000670d main + 141
33 libdyld.dylib 0x031b2725 start + 0
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)