请求超时改为15s

SLAiELTS/SLAiELTS/Tool/NetWorking/SLHttpCenter.m

@@ -10,7 +10,7 @@
 #import "AFNetworking.h"
 #import "SPRequestError.h"
 #import <CoreTelephony/CTCellularData.h>
-#define KTimeoutInterval 60;
+#define KTimeoutInterval 15;
 static NSString *const kNOConnect = @"网络无连接,请检查网络";
 
 static NSString *const SLResponseFailure = @"网络不给力 请稍后再试";