如何检测标注标注的标题？我已经有一个正确的标注配件和一个左边的配件，但我想检测用户是否点击了标题（位于标注的中心）。
如果无法做到这一点，如果点击标题，如何禁用隐藏标注？
答案 0 :(得分：4)
你的问题回答的时间已经很晚了，但我最近处理的是同样的问题，并通过反复试验来解决问题。 也许我可以帮助处理同样问题的人。
你也可以使用一些自定义注释和callout视图类，那里有很多例子。 但是，还有一种简单的方法可以解决这个问题，而无需使用复杂的外来类。
问题定义： 我希望能够通过触摸callout视图来触发某些方法。 我不想使用右或左配件按钮。 但当我触摸标注视图时，视图会立即消失。
解决方案的简短说明： 我们只使用带有“hittest”的自定义“MKPinAnnotationView”来检测标注视图中的触摸。
你也可以在帖子的末尾找到github项目链接。
touchableCallOutsViewController.h
//
// touchableCallOutsViewController.h
// touchableCallOuts
//
// Created by yasin turkoglu on 20.11.2012.
// Copyright (c) 2012 yasin turkoglu. All rights reserved.
//
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
@class myCustomPinAnnotationClass;
@interface touchableCallOutsViewController : UIViewController <MKMapViewDelegate> {
MKMapView *myMapView;
int pinCounter;
myCustomPinAnnotationClass *myAnnotation;
CLLocationCoordinate2D selectedPinCoordinate;
int selectedPinNumber;
}
@property (strong, nonatomic) MKMapView *myMapView;
@property (strong, nonatomic) myCustomPinAnnotationClass *myAnnotation;
@end
touchableCallOutsViewController.m
//
// touchableCallOutsViewController.m
// touchableCallOuts
//
// Created by yasin turkoglu on 20.11.2012.
// Copyright (c) 2012 yasin turkoglu. All rights reserved.
//
#import "touchableCallOutsViewController.h"
#import "myCustomPinAnnotationClass.h"
@interface touchableCallOutsViewController ()
@end
@implementation touchableCallOutsViewController
@synthesize myMapView;
@synthesize myAnnotation;
- (void)viewDidLoad
{
//first we create mapview and add pin annotation
myMapView = [[MKMapView alloc]initWithFrame:self.view.frame];
myMapView.delegate = self;
MKCoordinateRegion region = {{0,0},{1.0,1.0}};
region.center.latitude = 41.036651; //user defined
region.center.longitude = 28.983870;//user defined
[myMapView setRegion:region animated:YES];
[self.view addSubview:myMapView];
//we define long press recognizer for 2 seconds and add our map view to add new pin when you press 2 seconds on map view
UILongPressGestureRecognizer *lngPrs = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(handleMyLongPress:)];
lngPrs.minimumPressDuration = 2.0;
[myMapView addGestureRecognizer:lngPrs];
pinCounter = 1; //this variable hold pin numbers and increment 1 when new pin added.
myAnnotation = [[myCustomPinAnnotationClass alloc]initWithName:[NSString stringWithFormat:@"Pin %i",pinCounter] description:@"touch here to see pin coordinates" pinNum:pinCounter coordinate:region.center];
[myMapView addAnnotation:myAnnotation];
}
- (void)handleMyLongPress:(UIGestureRecognizer *)gestureRecognizer
{
if (gestureRecognizer.state != UIGestureRecognizerStateBegan) {
}else{
//when we press more than 2 seconds on map view UILongPressGestureRecognizer triggered this method and call our custom MKPinAnnotationView class and add annotation.
CGPoint touchPoint = [gestureRecognizer locationInView:myMapView];
CLLocationCoordinate2D touchMapCoordinate = [myMapView convertPoint:touchPoint toCoordinateFromView:myMapView];
pinCounter++;
myAnnotation = [[myCustomPinAnnotationClass alloc]initWithName:[NSString stringWithFormat:@"Pin %i",pinCounter] description:@"touch here to see pin coordinates" pinNum:pinCounter coordinate:touchMapCoordinate];
[myMapView addAnnotation:myAnnotation];
}
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
//when new annotation added by us, new annotation property will set here
static NSString *identifier = @"myPins";
if ([annotation isKindOfClass:[myCustomPinAnnotationClass class]]) {
myCustomPinAnnotationClass *annotationView = (myCustomPinAnnotationClass *) [self.myMapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if (annotationView == nil) {
annotationView = [[myCustomPinAnnotationClass alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
} else {
annotationView.annotation = annotation;
}
myAnnotation = (myCustomPinAnnotationClass *)annotation;
annotationView.pinColor = MKPinAnnotationColorGreen;
annotationView.enabled = YES;
annotationView.draggable = YES;
annotationView.canShowCallout = YES;
[annotationView setSelected:YES animated:YES];
return annotationView;
}
return nil;
}
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
//if you select any annotation to show their callout sellected annotation pin number and coordinate setted and call findcallot method
myAnnotation = (myCustomPinAnnotationClass *)view.annotation;
selectedPinCoordinate = myAnnotation.coordinate;
selectedPinNumber = myAnnotation.pinNum;
[self findCallOut:myMapView];
}
- (void)findCallOut:(UIView *)node
{
//this method dig our mapview with for loop until find callout view class named "UICalloutView"
if([node isKindOfClass:[NSClassFromString(@"UICalloutView") class]]){
//this method trigered together with callout open animation.
//in UICalloutView we have callout bubble image
//we dig it with for loop to find this image height
float buubleHeight = 0.0;
for(UIImageView *bubbleComponents in node.subviews){
//when we find callout bubble image take height to set our touchable area height
buubleHeight = bubbleComponents.frame.size.height;
break;
}
//this method triger with callout open animation as I said before
//ant this bouncing open animation distort actual size of callout view
//so when this happens we also get transform value of callout view and make proportion to find exact sizes.
CGFloat nodeTransformRatio = node.transform.a;
CGFloat calculatedWidth = roundf(node.frame.size.width / nodeTransformRatio);
CGFloat calculatedHeight = roundf(buubleHeight / nodeTransformRatio);
//now create a new UIView and sized according to callout view.
UIView *touchableView = [[UIView alloc]initWithFrame:CGRectMake(0.0, 0.0, calculatedWidth, calculatedHeight)];
touchableView.userInteractionEnabled = YES;
//we add new single tap gesture recognizer to triger desired method when users touching to the callout
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(doSomething)];
[touchableView addGestureRecognizer:singleTap];
//and finaly we add this newly created view in callout view to receive touches.
[node addSubview:touchableView];
}else{
//loop self until find a "UICalloutView"
for(UIView *child in node.subviews){
[self findCallOut:child];
}
}
}
- (void)doSomething
{
//this method call allert view our preseted variables when users touch callout view.
UIAlertView *alertHolder = [[UIAlertView alloc] initWithTitle:[NSString stringWithFormat:@"You're touched the Pin %i CallOut",selectedPinNumber] message:[NSString stringWithFormat:@"lat : %f\nlong : %f",selectedPinCoordinate.latitude,selectedPinCoordinate.longitude] delegate:self cancelButtonTitle:nil otherButtonTitles:@"ok",nil];
[alertHolder show];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
myCustomPinAnnotationClass.h
//
// myCustomPinAnnotationClass.h
// touchableCallOuts
//
// Created by yasin turkoglu on 20.11.2012.
// Copyright (c) 2012 yasin turkoglu. All rights reserved.
//
#import <MapKit/MapKit.h>
@interface myCustomPinAnnotationClass : MKPinAnnotationView <MKAnnotation> {
NSString *_name;
NSString *_description;
int _pinNum;
CLLocationCoordinate2D _coordinate;
}
@property (copy) NSString *name;
@property (copy) NSString *description;
@property (nonatomic, readonly) int pinNum;
@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;
- (id)initWithName:(NSString*)header description:(NSString*)description pinNum:(int)pinNum coordinate:(CLLocationCoordinate2D)coordinate;
@end
myCustomPinAnnotationClass.m
//
// myCustomPinAnnotationClass.m
// touchableCallOuts
//
// Created by yasin turkoglu on 20.11.2012.
// Copyright (c) 2012 yasin turkoglu. All rights reserved.
//
#import "myCustomPinAnnotationClass.h"
@implementation myCustomPinAnnotationClass
@synthesize name = _name;
@synthesize description = _description;
@synthesize pinNum = _pinNum;
@synthesize coordinate = _coordinate;
- (id)initWithName:(NSString*)header description:(NSString*)description pinNum:(int)pinNum coordinate:(CLLocationCoordinate2D)coordinate
{
self = [super init];
if (self) {
_name = [header copy];
_description = [description copy];
_pinNum = pinNum;
_coordinate = coordinate;
}
return self;
}
- (void)setCoordinate:(CLLocationCoordinate2D)newCoordinate
{
_coordinate = newCoordinate;
}
- (NSString *)title {
return _name;
}
- (NSString *)subtitle {
return _description;
}
- (int)tag {
return _pinNum;
}
-(UIView*)hitTest:(CGPoint)point withEvent:(UIEvent*)event
{
//test touched point in map view
//when hit test return nil callout close immediately by default
UIView* hitView = [super hitTest:point withEvent:event];
// if hittest return nil test touch point
if (hitView == nil){
//dig view to find custom touchable view lately added by us
for(UIView *firstView in self.subviews){
if([firstView isKindOfClass:[NSClassFromString(@"UICalloutView") class]]){
for(UIView *touchableView in firstView.subviews){
if([touchableView isKindOfClass:[UIView class]]){ //this is our touchable view class
//define touchable area
CGRect touchableArea = CGRectMake(firstView.frame.origin.x, firstView.frame.origin.y, touchableView.frame.size.width, touchableView.frame.size.height);
//test touch point if in touchable area
if (CGRectContainsPoint(touchableArea, point)){
//if touch point is in touchable area return touchable view as a touched view
hitView = touchableView;
}
}
}
}
}
}
return hitView;
}
@end
您可以在此下载包含源代码https://github.com/ytur/touchableCallOutsForIOSMaps
的完整项目列表