f489ec2ee1
A new class, `MGLUserLocationAnnotationView`, has been added that inherits from `MGLAnnotationView`. Use a subclass of `MGLUserLocationAnnotationView` to customize the appearance of the user location annotation. Use your custom view with the `MGLMapView.userLocation` annotation via the `-mapView:viewForAnnotation:` delegate method.
111 lines
2.8 KiB
Objective-C
111 lines
2.8 KiB
Objective-C
#import "MGLUserLocationAnnotationView.h"
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#import "MGLUserLocation.h"
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#import "MGLUserLocation_Private.h"
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#import "MGLAnnotationView_Private.h"
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#import "MGLAnnotation.h"
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#import "MGLMapView.h"
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#import "MGLCoordinateFormatter.h"
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#import "NSBundle+MGLAdditions.h"
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@interface MGLUserLocationAnnotationView()
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@property (nonatomic, weak, nullable) MGLMapView *mapView;
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@property (nonatomic, weak, nullable) MGLUserLocation *userLocation;
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@property (nonatomic, weak) CALayer *hitTestLayer;
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@end
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@implementation MGLUserLocationAnnotationView {
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MGLCoordinateFormatter *_accessibilityCoordinateFormatter;
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}
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- (instancetype)initWithFrame:(CGRect)frame
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{
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self = [super initWithFrame:frame];
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if (self == nil) return nil;
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self.accessibilityTraits = UIAccessibilityTraitButton | UIAccessibilityTraitAdjustable | UIAccessibilityTraitUpdatesFrequently;
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_accessibilityCoordinateFormatter = [[MGLCoordinateFormatter alloc] init];
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_accessibilityCoordinateFormatter.unitStyle = NSFormattingUnitStyleLong;
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return self;
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}
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- (CALayer *)hitTestLayer
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{
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return self.layer.presentationLayer;
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}
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- (void)update
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{
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// Left blank intentionally. Subclasses should usually override this in order to update the annotation’s appearance.
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}
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- (BOOL)isAccessibilityElement
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{
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return !self.hidden;
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}
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- (NSString *)accessibilityLabel
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{
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return self.userLocation.title;
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}
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- (NSString *)accessibilityValue
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{
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if (self.userLocation.subtitle)
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{
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return self.userLocation.subtitle;
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}
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// Each arcminute of longitude is at most about 1 nmi, too small for low zoom levels.
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// Each arcsecond of longitude is at most about 30 m, too small for all but the very highest of zoom levels.
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double zoomLevel = self.mapView.zoomLevel;
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_accessibilityCoordinateFormatter.allowsMinutes = zoomLevel > 8;
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_accessibilityCoordinateFormatter.allowsSeconds = zoomLevel > 20;
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return [_accessibilityCoordinateFormatter stringFromCoordinate:self.mapView.centerCoordinate];
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}
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- (CGRect)accessibilityFrame
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{
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return CGRectInset(self.frame, -15, -15);
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}
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- (UIBezierPath *)accessibilityPath
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{
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return [UIBezierPath bezierPathWithOvalInRect:self.frame];
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}
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- (void)accessibilityIncrement
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{
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[self.mapView accessibilityIncrement];
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}
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- (void)accessibilityDecrement
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{
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[self.mapView accessibilityDecrement];
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}
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- (void)setHidden:(BOOL)hidden
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{
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BOOL oldValue = super.hidden;
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[super setHidden:hidden];
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if (oldValue != hidden)
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{
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UIAccessibilityPostNotification(UIAccessibilityLayoutChangedNotification, nil);
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}
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}
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- (id<CAAction>)actionForLayer:(CALayer *)layer forKey:(NSString *)event
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{
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// Allow mbgl to drive animation of this view’s bounds.
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if ([event isEqualToString:@"bounds"])
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{
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return [NSNull null];
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}
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return [super actionForLayer:layer forKey:event];
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}
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@end
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