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当初始化一个新的类,这个类的方法将被自动执行。请看看下面的代码:问题有关iOS的核心位置GPS
CoreLocationDemoViewController.m
- (void)viewDidLoad {
NSLog(@"CORE_LOCATION_DEMO_VIEW_CONTROLLER=======>VIEW_DID_LOAD");
[super viewDidLoad];
CLController = [[CoreLocationController alloc] init]; // line 1
CLController.delegate = self; // line 2
[CLController.locMgr startUpdatingLocation];
}
CoreLocationController。米
- (id)init {
NSLog(@"CORE_LOCATION_CONTROLLER=======>INIT");
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
NSLog(@"CORE_LOCATION_CONTROLLER=======>DID_UPDATE_TO_LOCATION");
}
从调试,我得到了
2011-10-11 23:44:31.682 CoreLocationDemo[77470:207] CORE_LOCATION_CONTROLLER=======>INIT
2011-10-11 23:44:31.707 CoreLocationDemo[77470:207] CORE_LOCATION_CONTROLLER=======>DID_UPDATE_TO_LOCATION
似乎初始化和的LocationManager自动执行......我不敢肯定这个...
另一个问题是,在第2行,
CLController.delegate = self (delegate is declared as id delegate in CoreLocationController.h)
做什么
如果您以前遇到过,请在此提供帮助,并欢迎所有意见
是的,我确实修剪了一些线条。谢谢你的评论。我现在比较好.. –
第2行如何... –
由于您正在调用CLLocationManager(locMgr)的startUpdatingLocation,因此您没有直接调用didUpdateToLocation,所以locationmanager在获取locationFix时会调用委托方法didUpdateToLocation 。阅读[this](http://developer.apple.com/library/ios/#DOCUMENTATION/CoreLocation/Reference/CLLocationManager_Class/CLLocationManager/CLLocationManager.html)和http://developer.apple.com/library/ios/#文档/ CoreLocation /参考/ CLLocationManagerDelegate_Protocol/CLLocationManagerDelegate/CLLocationManagerDelegate.html。一般阅读委托如何工作。 – Saran