//判断roadTitleLab.text 是否含有Kris
if([roadTitleLab.text rangeOfString:@"Kris"].location !=NSNotFound)
//_roaldSearchText { NSLog(@"yes");
} else {
NSLog(@"no");
}
//GCD 写的 倒计时
double delayInSeconds = 30.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
NSLog(@"Bluetooth scan for 30 seconds");
[self.manager stopScan];
});
