小编Pri*_*dhi的帖子

检查依赖项

警告:没有规则来处理文件'/Users/priyankgandhi/Desktop/priyank/WalkUpAlarmRailways/Reachability.h'的类型sourcecode.ch for architecture i386

警告:没有规则处理文件'/Users/priyankgandhi/Desktop/priyank/WalkUpAlarmRailways/Reachability.h'的类型sourcecode.ch for architecture x86_64

怎么解决？

 NSDictionary *regionDict = (NSDictionary *) region;
            NSNumber *lat = [regionDict objectForKey:@"lat"];
            //[latitude addObject:lat];
            NSNumber *lng = [regionDict objectForKey:@"lng"];
            //[longitude addObject:lng];
            NSLog(@"%@%@%@",lat,lng,titles);

            if(lat == [NSNumber numberWithFloat:0.00]  && lng == [NSNumber numberWithFloat:0.00])
            {
                NSLog(@"%@%@%@",lat,lng,titles);
            }
            else
            {
                CLLocationCoordinate2D coord;
                coord.latitude =lat.doubleValue;
                coord.longitude =lng.doubleValue;
                MapViewAnnotation *annotation =[[MapViewAnnotation alloc]initWithTitle:titles AndCoordinate:coord];
                [self.mapView addAnnotation:annotation];
            }

如果由于NSNumber而不满足条件,则不检查空值.我可以检查的方式是什么？告诉我可能的方法..检查null.