CoreLocation

弹框一闪而过的问题应该是CLLocationManager的实例被释放了，把它改为成员变量或静态变量就可以了。 

@interface ViewController (){
    WayFinderManager *w;
}

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    w = [WayFinderManager new];


}