react-native/React/Views/RCTMapManager.m

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
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#import "RCTMapManager.h"
#import "RCTBridge.h"
#import "RCTConvert+CoreLocation.h"
#import "RCTConvert+MapKit.h"
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#import "RCTEventDispatcher.h"
#import "RCTMap.h"
#import "RCTUtils.h"
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#import "UIView+React.h"
#import "RCTMapAnnotation.h"
#import "RCTMapOverlay.h"
#import <MapKit/MapKit.h>
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static NSString *const RCTMapViewKey = @"MapView";
#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_9_0
static NSString *const RCTMapPinRed = @"#ff3b30";
static NSString *const RCTMapPinGreen = @"#4cd964";
static NSString *const RCTMapPinPurple = @"#c969e0";
@implementation RCTConvert (MKPinAnnotationColor)
RCT_ENUM_CONVERTER(MKPinAnnotationColor, (@{
RCTMapPinRed: @(MKPinAnnotationColorRed),
RCTMapPinGreen: @(MKPinAnnotationColorGreen),
RCTMapPinPurple: @(MKPinAnnotationColorPurple)
}), MKPinAnnotationColorRed, unsignedIntegerValue)
@end
#endif
@interface RCTMapAnnotationView : MKAnnotationView
@property (nonatomic, strong) UIView *contentView;
@end
@implementation RCTMapAnnotationView
- (void)setContentView:(UIView *)contentView
{
[_contentView removeFromSuperview];
_contentView = contentView;
[self addSubview:_contentView];
}
- (void)layoutSubviews
{
[super layoutSubviews];
self.bounds = (CGRect){
CGPointZero,
_contentView.frame.size,
};
}
@end
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@interface RCTMapManager() <MKMapViewDelegate>
@end
@implementation RCTMapManager
RCT_EXPORT_MODULE()
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- (UIView *)view
{
RCTMap *map = [RCTMap new];
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map.delegate = self;
return map;
}
RCT_EXPORT_VIEW_PROPERTY(showsUserLocation, BOOL)
RCT_EXPORT_VIEW_PROPERTY(showsPointsOfInterest, BOOL)
RCT_EXPORT_VIEW_PROPERTY(showsCompass, BOOL)
RCT_EXPORT_VIEW_PROPERTY(followUserLocation, BOOL)
RCT_EXPORT_VIEW_PROPERTY(zoomEnabled, BOOL)
RCT_EXPORT_VIEW_PROPERTY(rotateEnabled, BOOL)
RCT_EXPORT_VIEW_PROPERTY(pitchEnabled, BOOL)
RCT_EXPORT_VIEW_PROPERTY(scrollEnabled, BOOL)
RCT_EXPORT_VIEW_PROPERTY(maxDelta, CGFloat)
RCT_EXPORT_VIEW_PROPERTY(minDelta, CGFloat)
RCT_EXPORT_VIEW_PROPERTY(legalLabelInsets, UIEdgeInsets)
RCT_EXPORT_VIEW_PROPERTY(mapType, MKMapType)
RCT_EXPORT_VIEW_PROPERTY(annotations, NSArray<RCTMapAnnotation *>)
RCT_EXPORT_VIEW_PROPERTY(overlays, NSArray<RCTMapOverlay *>)
RCT_EXPORT_VIEW_PROPERTY(onAnnotationDragStateChange, RCTBubblingEventBlock)
RCT_EXPORT_VIEW_PROPERTY(onAnnotationFocus, RCTBubblingEventBlock)
RCT_EXPORT_VIEW_PROPERTY(onAnnotationBlur, RCTBubblingEventBlock)
RCT_EXPORT_VIEW_PROPERTY(onChange, RCTBubblingEventBlock)
RCT_EXPORT_VIEW_PROPERTY(onPress, RCTBubblingEventBlock)
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RCT_CUSTOM_VIEW_PROPERTY(region, MKCoordinateRegion, RCTMap)
{
if (json) {
[view setRegion:[RCTConvert MKCoordinateRegion:json] animated:YES];
}
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}
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#pragma mark MKMapViewDelegate
- (void)mapView:(RCTMap *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
// TODO: Remove deprecated onAnnotationPress API call later.
if (mapView.onPress && [view.annotation isKindOfClass:[RCTMapAnnotation class]]) {
RCTMapAnnotation *annotation = (RCTMapAnnotation *)view.annotation;
mapView.onPress(@{
@"action": @"annotation-click",
@"annotation": @{
@"id": annotation.identifier,
@"title": annotation.title ?: @"",
@"subtitle": annotation.subtitle ?: @"",
@"latitude": @(annotation.coordinate.latitude),
@"longitude": @(annotation.coordinate.longitude)
}
});
}
if ([view.annotation isKindOfClass:[RCTMapAnnotation class]]) {
RCTMapAnnotation *annotation = (RCTMapAnnotation *)view.annotation;
if (mapView.onAnnotationFocus) {
mapView.onAnnotationFocus(@{
@"annotationId": annotation.identifier
});
}
}
}
- (void)mapView:(RCTMap *)mapView didDeselectAnnotationView:(MKAnnotationView *)view
{
if ([view.annotation isKindOfClass:[RCTMapAnnotation class]]) {
RCTMapAnnotation *annotation = (RCTMapAnnotation *)view.annotation;
if (mapView.onAnnotationBlur) {
mapView.onAnnotationBlur(@{
@"annotationId": annotation.identifier
});
}
}
}
- (void)mapView:(RCTMap *)mapView annotationView:(MKAnnotationView *)view
didChangeDragState:(MKAnnotationViewDragState)newState
fromOldState:(MKAnnotationViewDragState)oldState
{
static NSArray *states;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
states = @[@"idle", @"starting", @"dragging", @"canceling", @"ending"];
});
if ([view.annotation isKindOfClass:[RCTMapAnnotation class]]) {
RCTMapAnnotation *annotation = (RCTMapAnnotation *)view.annotation;
if (mapView.onAnnotationDragStateChange) {
mapView.onAnnotationDragStateChange(@{
@"state": states[newState],
@"oldState": states[oldState],
@"annotationId": annotation.identifier,
@"latitude": @(annotation.coordinate.latitude),
@"longitude": @(annotation.coordinate.longitude),
});
}
}
}
- (MKAnnotationView *)mapView:(RCTMap *)mapView
viewForAnnotation:(RCTMapAnnotation *)annotation
{
if (![annotation isKindOfClass:[RCTMapAnnotation class]]) {
return nil;
}
MKAnnotationView *annotationView;
if (annotation.viewIndex != NSNotFound &&
annotation.viewIndex < mapView.reactSubviews.count) {
NSString *reuseIdentifier = NSStringFromClass([RCTMapAnnotationView class]);
annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:reuseIdentifier];
if (!annotationView) {
annotationView = [[RCTMapAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:reuseIdentifier];
}
UIView *reactView = mapView.reactSubviews[annotation.viewIndex];
((RCTMapAnnotationView *)annotationView).contentView = reactView;
} else if (annotation.image) {
NSString *reuseIdentifier = NSStringFromClass([MKAnnotationView class]);
annotationView =
[mapView dequeueReusableAnnotationViewWithIdentifier:reuseIdentifier] ?:
[[MKAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:reuseIdentifier];
annotationView.image = annotation.image;
} else {
NSString *reuseIdentifier = NSStringFromClass([MKPinAnnotationView class]);
annotationView =
[mapView dequeueReusableAnnotationViewWithIdentifier:reuseIdentifier] ?:
[[MKPinAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:reuseIdentifier];
((MKPinAnnotationView *)annotationView).animatesDrop = annotation.animateDrop;
#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_9_0
if (![annotationView respondsToSelector:@selector(pinTintColor)]) {
NSString *hexColor = annotation.tintColor ?
RCTColorToHexString(annotation.tintColor.CGColor) : RCTMapPinRed;
((MKPinAnnotationView *)annotationView).pinColor =
[RCTConvert MKPinAnnotationColor:hexColor];
} else
#endif
{
((MKPinAnnotationView *)annotationView).pinTintColor =
annotation.tintColor ?: [MKPinAnnotationView redPinColor];
}
}
annotationView.canShowCallout = (annotation.title.length > 0);
if (annotation.leftCalloutViewIndex != NSNotFound &&
annotation.leftCalloutViewIndex < mapView.reactSubviews.count) {
annotationView.leftCalloutAccessoryView =
mapView.reactSubviews[annotation.leftCalloutViewIndex];
} else if (annotation.hasLeftCallout) {
annotationView.leftCalloutAccessoryView =
[UIButton buttonWithType:UIButtonTypeDetailDisclosure];
} else {
annotationView.leftCalloutAccessoryView = nil;
}
if (annotation.rightCalloutViewIndex != NSNotFound &&
annotation.rightCalloutViewIndex < mapView.reactSubviews.count) {
annotationView.rightCalloutAccessoryView =
mapView.reactSubviews[annotation.rightCalloutViewIndex];
} else if (annotation.hasRightCallout) {
annotationView.rightCalloutAccessoryView =
[UIButton buttonWithType:UIButtonTypeDetailDisclosure];
} else {
annotationView.rightCalloutAccessoryView = nil;
}
//http://stackoverflow.com/questions/32581049/mapkit-ios-9-detailcalloutaccessoryview-usage
if ([annotationView respondsToSelector:@selector(detailCalloutAccessoryView)]) {
if (annotation.detailCalloutViewIndex != NSNotFound &&
annotation.detailCalloutViewIndex < mapView.reactSubviews.count) {
UIView *calloutView = mapView.reactSubviews[annotation.detailCalloutViewIndex];
NSLayoutConstraint *widthConstraint =
[NSLayoutConstraint constraintWithItem:calloutView
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:nil
attribute:NSLayoutAttributeNotAnAttribute
multiplier:1
constant:calloutView.frame.size.width];
[calloutView addConstraint:widthConstraint];
NSLayoutConstraint *heightConstraint =
[NSLayoutConstraint constraintWithItem:calloutView
attribute:NSLayoutAttributeHeight
relatedBy:NSLayoutRelationEqual
toItem:nil
attribute:NSLayoutAttributeNotAnAttribute
multiplier:1
constant:calloutView.frame.size.height];
[calloutView addConstraint:heightConstraint];
annotationView.detailCalloutAccessoryView = calloutView;
} else {
annotationView.detailCalloutAccessoryView = nil;
}
}
annotationView.draggable = annotation.draggable;
return annotationView;
}
- (MKOverlayRenderer *)mapView:(__unused MKMapView *)mapView
rendererForOverlay:(RCTMapOverlay *)overlay
{
if ([overlay isKindOfClass:[RCTMapOverlay class]]) {
MKPolylineRenderer *polylineRenderer =
[[MKPolylineRenderer alloc] initWithPolyline:overlay];
polylineRenderer.strokeColor = overlay.strokeColor;
polylineRenderer.lineWidth = overlay.lineWidth;
return polylineRenderer;
} else {
return nil;
}
}
- (void)mapView:(RCTMap *)mapView annotationView:(MKAnnotationView *)view
calloutAccessoryControlTapped:(UIControl *)control
{
if (mapView.onPress) {
// Pass to JS
RCTMapAnnotation *annotation = (RCTMapAnnotation *)view.annotation;
mapView.onPress(@{
@"side": (control == view.leftCalloutAccessoryView) ? @"left" : @"right",
@"action": @"callout-click",
@"annotationId": annotation.identifier
});
}
}
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- (void)mapView:(RCTMap *)mapView didUpdateUserLocation:(MKUserLocation *)location
{
if (mapView.followUserLocation) {
MKCoordinateRegion region;
region.span.latitudeDelta = RCTMapDefaultSpan;
region.span.longitudeDelta = RCTMapDefaultSpan;
region.center = location.coordinate;
[mapView setRegion:region animated:YES];
}
}
- (void)mapView:(RCTMap *)mapView regionWillChangeAnimated:(__unused BOOL)animated
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{
[self _regionChanged:mapView];
mapView.regionChangeObserveTimer =
[NSTimer timerWithTimeInterval:RCTMapRegionChangeObserveInterval
target:self
selector:@selector(_onTick:)
userInfo:@{ RCTMapViewKey: mapView }
repeats:YES];
[[NSRunLoop mainRunLoop] addTimer:mapView.regionChangeObserveTimer
forMode:NSRunLoopCommonModes];
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}
- (void)mapView:(RCTMap *)mapView regionDidChangeAnimated:(__unused BOOL)animated
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{
[mapView.regionChangeObserveTimer invalidate];
mapView.regionChangeObserveTimer = nil;
[self _regionChanged:mapView];
// Don't send region did change events until map has
// started rendering, as these won't represent the final location
if (mapView.hasStartedRendering) {
[self _emitRegionChangeEvent:mapView continuous:NO];
};
}
- (void)mapViewWillStartRenderingMap:(RCTMap *)mapView
{
mapView.hasStartedRendering = YES;
[self _emitRegionChangeEvent:mapView continuous:NO];
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}
#pragma mark Private
- (void)_onTick:(NSTimer *)timer
{
[self _regionChanged:timer.userInfo[RCTMapViewKey]];
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}
- (void)_regionChanged:(RCTMap *)mapView
{
BOOL needZoom = NO;
CGFloat newLongitudeDelta = 0.0f;
MKCoordinateRegion region = mapView.region;
// On iOS 7, it's possible that we observe invalid locations during
// initialization of the map. Filter those out.
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if (!CLLocationCoordinate2DIsValid(region.center)) {
return;
}
// Calculation on float is not 100% accurate. If user zoom to max/min and then
// move, it's likely the map will auto zoom to max/min from time to time.
// So let's try to make map zoom back to 99% max or 101% min so that there is
// some buffer, and moving the map won't constantly hit the max/min bound.
if (mapView.maxDelta > FLT_EPSILON &&
region.span.longitudeDelta > mapView.maxDelta) {
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needZoom = YES;
newLongitudeDelta = mapView.maxDelta * (1 - RCTMapZoomBoundBuffer);
} else if (mapView.minDelta > FLT_EPSILON &&
region.span.longitudeDelta < mapView.minDelta) {
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needZoom = YES;
newLongitudeDelta = mapView.minDelta * (1 + RCTMapZoomBoundBuffer);
}
if (needZoom) {
region.span.latitudeDelta =
region.span.latitudeDelta / region.span.longitudeDelta * newLongitudeDelta;
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region.span.longitudeDelta = newLongitudeDelta;
mapView.region = region;
}
// Continously observe region changes
[self _emitRegionChangeEvent:mapView continuous:YES];
}
- (void)_emitRegionChangeEvent:(RCTMap *)mapView continuous:(BOOL)continuous
{
if (mapView.onChange) {
MKCoordinateRegion region = mapView.region;
if (!CLLocationCoordinate2DIsValid(region.center)) {
return;
}
mapView.onChange(@{
@"continuous": @(continuous),
@"region": @{
@"latitude": @(RCTZeroIfNaN(region.center.latitude)),
@"longitude": @(RCTZeroIfNaN(region.center.longitude)),
@"latitudeDelta": @(RCTZeroIfNaN(region.span.latitudeDelta)),
@"longitudeDelta": @(RCTZeroIfNaN(region.span.longitudeDelta)),
}
});
}
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}
@end