detailButton无法推送信息。推送的页面总是有空标签

Question

嗨，some1能帮我吗……

问题是:一切似乎都很好..一旦我点击detailButton，我就可以推送到另一个页面。但是，我能够推送到的页面始终只是一个视图，没有任何值传递到标签中。视图中的所有标签都没有任何内容..我是不是做错了什么，或者有什么错误的概念？

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{

    BOOL isRed = NO;
    //BOOL isPurple = YES;

    if([annotation isKindOfClass:[MyAnnotation2 class]])
        isRed = YES;



    MKPinAnnotationView *pinView = nil;



    if(isRed) {
        static NSString *redPin = @"redPin";
        pinView = (MKPinAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier:redPin];
        if (!pinView) {
            pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:redPin] autorelease];
            pinView.pinColor = MKPinAnnotationColorRed;
            pinView.animatesDrop = YES;
            pinView.canShowCallout = YES;

            UIButton *detailButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];


            pinView.rightCalloutAccessoryView = detailButton;

        }

        else{
            pinView.annotation = annotation;
        }    
    }
    else {
        static NSString *greenPin = @"greenPin";
        pinView = (MKPinAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier:greenPin];
        if (!pinView) {
            pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:greenPin] autorelease];
            pinView.pinColor = MKPinAnnotationColorGreen;
            pinView.animatesDrop = NO;
            pinView.canShowCallout = YES;
            UIButton *detailButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];


            pinView.rightCalloutAccessoryView = detailButton;

        }

    }  
    return pinView; 

}

//

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
    NSLog(@"calloutAccessoryControlTapped");

if (self.patientDetailsViewController == nil) {
    self.patientDetailsViewController = [[[PatientDetailsViewController alloc] initWithNibName:@"PatientDetailsViewController" bundle:nil] autorelease];        
} 

MyAnnotation2 *selectedObject = (MyAnnotation2 *)view.annotation;
_patientDetailsViewController.nric = selectedObject.title;
NSLog(@"%@",_patientDetailsViewController.nric);
[self.navigationController pushViewController:_patientDetailsViewController animated:YES];

}

Answer 1

不要对callout附件按钮使用自己的目标/操作和标记。

相反，请使用MKMapViewDelegate方法calloutAccessoryControlTapped:。删除addTarget行并实现委托方法。

在委托方法中，您可以使用以下命令访问点击的批注：

MyAnnotation2 *selectedObject = (MyAnnotation2 *)view.annotation;