iOS 13 get application statusBar crash - objective-c

Question

only crash on beta2 and beta 3 when call code like this,:
[application valueForKeyPath:#"statusBar"]
some can help me? i call this method to get phone's network status.
the whole code like this:
if (![self isIPhoneX]) {
if ([[application valueForKeyPath:#"_statusBar"] isKindOfClass:NSClassFromString(#"UIStatusBar_Modern")]) {
children = [[[[application valueForKeyPath:#"_statusBar"] valueForKeyPath:#"_statusBar"] valueForKeyPath:#"foregroundView"] subviews];
} else {
children = [[[application valueForKeyPath:#"_statusBar"] valueForKeyPath:#"foregroundView"] subviews];
}
Class expectClass = NSClassFromString(#"UIStatusBarDataNetworkItemView");
for (id child in children) {
if ([child isKindOfClass:expectClass]) {
int netType = [[child valueForKeyPath:#"dataNetworkType"] intValue];
switch (netType) {
case 0: state = #"";break;
case 1: state = #"2g";break;
case 2: state = #"3g";break;
case 3: state = #"4g";break;
case 5: state = #"wifi";break;
default: state = #"";break;
} /* switch */
}
}
} else {
id statusBar = [application valueForKeyPath:#"statusBar"];
id statusBarView = [statusBar valueForKeyPath:#"statusBar"];
UIView *foregroundView = [statusBarView valueForKeyPath:#"foregroundView"];
children = [[foregroundView subviews][2] subviews];
for (id child in children) {
if ([child isKindOfClass:NSClassFromString(#"_UIStatusBarWifiSignalView")]) {
state = #"wifi";
}else if ([child isKindOfClass:NSClassFromString(#"_UIStatusBarStringView")]) {
NSString *str = [child valueForKeyPath:#"_originalText"];
if ([str isEqualToString:#"4G"]) {
state = #"4g";
}else if([str isEqualToString:#"3G"]){
state = #"3g";
} else{
state = #"2g";
}
}
}
}
I install iOS 13 open beta version and every thing runs good except some label showing ...,but i receive crash when online beta2 and beta3 version.

Answer 1

+ (NSString *)deviceNetworkingType
{
NSString *strNetworkInfo = #"No Network";
struct sockaddr_storage zeroAddress;
bzero(&zeroAddress,sizeof(zeroAddress)); zeroAddress.ss_len = sizeof(zeroAddress);
zeroAddress.ss_family = AF_INET;
// Recover reachability flags
SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL,(struct sockaddr *)&zeroAddress);
SCNetworkReachabilityFlags flags;
BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability,&flags);
CFRelease(defaultRouteReachability);
if(!didRetrieveFlags){ return strNetworkInfo;}
BOOL isReachable = ((flags & kSCNetworkFlagsReachable)!=0);
BOOL needsConnection = ((flags & kSCNetworkFlagsConnectionRequired)!=0);
if(!isReachable || needsConnection) {return strNetworkInfo;}
if((flags & kSCNetworkReachabilityFlagsConnectionRequired)== 0){
strNetworkInfo = #"WIFI";
}
if(((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) ||(flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0) {
if ((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0){
strNetworkInfo = #"WIFI";
}
}
if ((flags & kSCNetworkReachabilityFlagsIsWWAN) ==kSCNetworkReachabilityFlagsIsWWAN) {
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {
CTTelephonyNetworkInfo * info = [[CTTelephonyNetworkInfo alloc] init];
NSString *currentRadioAccessTechnology = info.currentRadioAccessTechnology;
if (currentRadioAccessTechnology) {
if ([currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyLTE]) {
strNetworkInfo =#"4G";
} else if ([currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyEdge] || [currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyGPRS]) {
strNetworkInfo =#"2G";
} else {
strNetworkInfo =#"3G";
}
}
} else {
if((flags & kSCNetworkReachabilityFlagsReachable) == kSCNetworkReachabilityFlagsReachable) {
if ((flags & kSCNetworkReachabilityFlagsTransientConnection) == kSCNetworkReachabilityFlagsTransientConnection) {
if((flags & kSCNetworkReachabilityFlagsConnectionRequired) == kSCNetworkReachabilityFlagsConnectionRequired) {
strNetworkInfo =#"2G";
} else {
strNetworkInfo =#"3G";
}
}
}
}
}
return strNetworkInfo;
}