直接读取状态栏上信息获取网络状态－可以扩展获取电量运营商等信息

-(NSString *)getNetWorkStates{

UIApplication *app = [UIApplication sharedApplication];

NSArray *children = [[[app valueForKeyPath:@"statusBar"]valueForKeyPath:@"foregroundView"]subviews];

NSString *state = nil;

int netType = 0;

for (id child in children) {

if ([child isKindOfClass:NSClassFromString(@"UIStatusBarDataNetworkItemView")]) {

netType = [[child valueForKeyPath:@"dataNetworkType"]intValue];

switch (netType) {

case 0:

state = @"无网络";

break;

case 1:

state = @"2G";

break;

case 2:

state = @"3G";

break;

case 3:

state = @"4G";

break;

case 5:

state = @"WIFI";

break;

default:

break;

}

}

}

return state;

}