iOS自定义图标用于随机化地图注释

Question

在我的地图视图中，我在json的位置加载。 （效果很好）

在我的json中，我有一个名为＆＃39; type＆＃39;这有助于在viewForAnnotation中设置图像（效果很好）

我有一组单选按钮，删除所有注释，然后根据类型重新加载某些注释（效果很好 - sorta）

这个问题是按下单选按钮时所有数据都正确但图标全部重新排列（看起来是随机的）。这个标题，副标题，电话和类型都是正确的。

看起来按下按钮时，不会触发视图注释。至少没有东西登录该方法。但那仅仅是图标被设置。我迷失在这一个。

CODE

- (void)whichPins:(int)t {

    for(id key in json) {
        id value = [json objectForKey:key];
        NSString *address = [value valueForKey:@"address"];
        NSString *latitude = [value valueForKey:@"latitude"];
        NSString *longitude = [value valueForKey:@"longitude"];

        NSArray* foo = [address componentsSeparatedByString: @":"];
        NSString* address2 = [foo objectAtIndex: 0];
        phone = [foo objectAtIndex: 1];

        double myLatitude = [latitude doubleValue];
        double myLongitude = [longitude doubleValue];

        MKCoordinateRegion location1;
        location1.center.latitude = myLatitude;
        location1.center.longitude = myLongitude;
        location1.span.longitudeDelta = 0.1;
        location1.span.latitudeDelta = 0.1;

        ann1 = [[[MapAnnotation alloc] init] autorelease];
        ann1.title = [NSString stringWithFormat:@"%@",[value valueForKey:@"title"]];
        ann1.subtitle = [NSString stringWithFormat:@"%@",address2];
        ann1.phone = [NSString stringWithFormat:@"%@",phone];
        ann1.coordinate = location1.center;
        ann1.type = [value valueForKey:@"type"];

        if (t == 0) {
            [mapView addAnnotation:ann1];
        } else if (t == 1 && [ann1.type isEqualToString:@"1"]) {
            [mapView addAnnotation:ann1];
        } else if (t == 2 && [ann1.type isEqualToString:@"2"]) {
            [mapView addAnnotation:ann1];
        } else if (t == 3) {
            if ([ann1.type isEqualToString:@"0"] || [ann1.type isEqualToString:@"3"] || [ann1.type isEqualToString:@"4"]) {
                [mapView addAnnotation:ann1];
            }
        } else {}

        //NSLog(@"Title: %@ , type: %@", ann1.subtitle, ann1.type);

        [phone retain];
        [json retain];
    }
    //NSLog(@"/////////////////////////////////////////////////////////////////");
}

- (MKAnnotationView *)mapView:(MKMapView *)mapView2 viewForAnnotation:(id<MKAnnotation>)annotation {

    if ([annotation isKindOfClass:[MKUserLocation class]])
        return nil;
    static NSString* AnnotationIdentifier = @"AnnotationIdentifier";
    MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
    if(annotationView)
        return annotationView;
    else {
        MKAnnotationView *annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation
                                                                         reuseIdentifier:AnnotationIdentifier] autorelease];
        annotationView.canShowCallout = YES;
        annotationView.draggable = NO;

        if (![((MapAnnotation *)annotation).phone isEqualToString: @"0"]) {
            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            [rightButton setImage:[UIImage imageNamed:@"map_phone_icon"] forState:UIControlStateNormal];
            [rightButton addTarget:self action:@selector(button:) forControlEvents:UIControlEventTouchUpInside];
            [rightButton setTitle:annotation.title forState:UIControlStateNormal];
            annotationView.rightCalloutAccessoryView = rightButton;
        }
        if ([((MapAnnotation *)annotation).type isEqualToString: @"0"]) {
            annotationView.image = [UIImage imageNamed:@"popomap.png"];
        } else if ([((MapAnnotation *)annotation).type isEqualToString: @"1"]) {
            annotationView.image = [UIImage imageNamed:@"robbery.png"];
        } else if ([((MapAnnotation *)annotation).type isEqualToString: @"2"]) {
            annotationView.image = [UIImage imageNamed:@"other.png"];
        } else if ([((MapAnnotation *)annotation).type isEqualToString: @"3"]) {
            annotationView.image = [UIImage imageNamed:@"firemap.png"];
        } else if ([((MapAnnotation *)annotation).type isEqualToString: @"4"]) {
            annotationView.image = [UIImage imageNamed:@"doctormap.png"];
        }


        return annotationView;
    }
    return nil;
}

- (IBAction)onRadioBtn:(RadioButton*)sender {
    [mapView removeAnnotations:mapView.annotations];

    if ([sender.titleLabel.text isEqualToString:@"All"]) {
        rbtnType = 0;
    }
    if ([sender.titleLabel.text isEqualToString:@"Crime"]) {
        rbtnType = 1;
    }
    if ([sender.titleLabel.text isEqualToString:@"Other"]) {
        rbtnType = 2;
    }
    if ([sender.titleLabel.text isEqualToString:@"Stations"]) {
        rbtnType = 3;
    }
    [self whichPins:rbtnType];
}

Answer 1

annotationView已经创建，所以当我再次加载引脚时，它忽略了图标代码：

MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
if(annotationView)
    return annotationView;

将其更改为：

MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
    if(annotationView) {
        if (![((MapAnnotation *)annotation).phone isEqualToString: @"0"]) {
            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            [rightButton setImage:[UIImage imageNamed:@"map_phone_icon"] forState:UIControlStateNormal];
            [rightButton addTarget:self action:@selector(button:) forControlEvents:UIControlEventTouchUpInside];
            [rightButton setTitle:annotation.title forState:UIControlStateNormal];
            annotationView.rightCalloutAccessoryView = rightButton;
        }
        if ([((MapAnnotation *)annotation).type isEqualToString: @"0"]) {
            annotationView.image = [UIImage imageNamed:@"popomap.png"];
        } else if ([((MapAnnotation *)annotation).type isEqualToString: @"1"]) {
            annotationView.image = [UIImage imageNamed:@"robbery.png"];
        } else if ([((MapAnnotation *)annotation).type isEqualToString: @"2"]) {
            annotationView.image = [UIImage imageNamed:@"other.png"];
        } else if ([((MapAnnotation *)annotation).type isEqualToString: @"3"]) {
            annotationView.image = [UIImage imageNamed:@"firemap.png"];
        } else if ([((MapAnnotation *)annotation).type isEqualToString: @"4"]) {
            annotationView.image = [UIImage imageNamed:@"doctormap.png"];
        }

        return annotationView;