我正在尝试创建一个应用程序,其中各种引脚放在地图上。
当我触摸一个引脚时,标准气泡会弹出一个公开按钮。当我单击我的公开按钮时,我希望它打开一个新的ViewController,以便我可以显示更多信息。
问题是,每次运行应用程序时,它都会崩溃并且它会在输出中出现错误。
我该如何解决这个问题?
输出中的错误是:
2013-06-29 16:51:33.575 ... [2723:13d03] - [FirstViewController ...单击:]:无法识别的选择器发送到实例0x867d0d0 2013-06-29 16:51:33.576 lam [2723:13d03] *由于终止应用程序 未捕获的异常'NSInvalidArgumentException',原因: ' - [FirstViewController ... Clicked:]:发送无法识别的选择器 例子0x867d0d0' * 第一次抛出调用堆栈:(0x1d8d012 0x11cae7e 0x1e184bd 0x1d7cbbc 0x1d7c94e 0x11de705 0x182c0 0x18258 0xd9021 0xd957f 0xd86e8 0x47cef 0x47f02 0x25d4a 0x17698 0x1ce8df9 0x1ce8ad0 0x1d02bf5 0x1d02962 0x1d33bb6 0x1d32f44 0x1d32e1b 0x1ce77e3 0x1ce7668 0x14ffc 0x1e12 0x1d45)libc ++ abi.dylib:terminate调用抛出异常
我的FirstViewController.m中的代码是:
[...]
[...]
-(MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
MKPinAnnotationView *MyPin=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"current"];
MyPin.pinColor = MKPinAnnotationColorPurple;
UIButton *advertButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
if ([[annotation title] isEqualToString:@"..."]) {
[advertButton addTarget:self action:@selector(...Clicked:) forControlEvents:UIControlEventTouchUpInside];
}
if ([[annotation title] isEqualToString:@"..."]) {
[advertButton addTarget:self action:@selector(...Clicked:) forControlEvents:UIControlEventTouchUpInside];
}
MyPin.rightCalloutAccessoryView = advertButton;
MyPin.draggable = NO;
MyPin.highlighted = YES;
MyPin.animatesDrop=TRUE;
MyPin.canShowCallout = YES;
return MyPin;
}
- (void)mapView:(MKMapView *)mapView MyPin:(MKPinAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
// Go to edit view
UIViewController *detailViewController = [[UIViewController alloc] initWithNibName:@"...Controller" bundle:nil];
[self.navigationController pushViewController:detailViewController animated:YES];
}
//-(void) ...Clicked:(id)sender {
// NSLog(@"... Clicked");
//}
-(void) ...:(id)sender {
NSLog(@"...");
}
-(IBAction)findmylocation:(id)sender {
mapView.showsUserLocation = YES;
mapView.delegate = self;
[mapView setUserTrackingMode:MKUserTrackingModeFollow animated:YES];
}
导致错误的原因是:
- (void)mapView:(MKMapView *)mapView MyPin:(MKPinAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control {
// Go to edit view
UIViewController *detailViewController = [[UIViewController alloc] initWithNibName:@"..." bundle:nil];
[self.navigationController pushViewController:detailViewController animated:YES];
}
编辑2: 我已经删除了advertButton addTarget行,但是现在我运行模拟器时没有透露按钮...是我删除了正确的吗?
-(MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
MKPinAnnotationView *MyPin=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"current"];
MyPin.pinColor = MKPinAnnotationColorPurple;
UIButton *advertButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
if ([[annotation title] isEqualToString:@"..."])
if ([[annotation title] isEqualToString:@"..."])
答案 0 :(得分:3)
错误:
[FirstViewController ... Clicked:]:无法识别的选择器发送到实例
表示它试图在...Clicked:
上调用FirstViewController
方法(因为您将advertButton
的目标设置为该方法)但是没有这样的方法(您已评论过)它出来了。
你可以取消评论。
但是,由于您使用calloutAccessoryControlTapped
委托方法来检测附件点击(比自定义方法更好的选择),您应该执行以下操作:
移除 来自advertButton addTarget
的{{1}}行,只需处理viewForAnnotation
中的点击。
同时删除calloutAccessoryControlTapped
方法。
另一个问题是方法...Clicked:
被错误地命名为calloutAccessoryControlTapped
。
方法 必须 这样命名为mapView:MyPin:calloutAccessoryControlTapped:
:
mapView:annotationView:calloutAccessoryControlTapped:
顺便说一句,在- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
// Go to edit view
UIViewController *detailViewController = [[UIViewController alloc] initWithNibName:@"...Controller" bundle:nil];
[self.navigationController pushViewController:detailViewController animated:YES];
}
中,您将能够访问通过calloutAccessoryControlTapped
点击的注释。
更新的view.annotation
应该是这样的:
viewForAnnotation