react-native/React/Views/RCTMap.m

113 lines
3.0 KiB
Objective-C

/**
* 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.
*/
#import "RCTMap.h"
#import "RCTConvert.h"
#import "RCTEventDispatcher.h"
#import "RCTLog.h"
#import "RCTUtils.h"
const CLLocationDegrees RCTMapDefaultSpan = 0.005;
const NSTimeInterval RCTMapRegionChangeObserveInterval = 0.1;
const CGFloat RCTMapZoomBoundBuffer = 0.01;
@implementation RCTMap
{
UIView *_legalLabel;
CLLocationManager *_locationManager;
}
- (instancetype)init
{
if ((self = [super init])) {
// Find Apple link label
for (UIView *subview in self.subviews) {
if ([NSStringFromClass(subview.class) isEqualToString:@"MKAttributionLabel"]) {
// This check is super hacky, but the whole premise of moving around Apple's internal subviews is super hacky
_legalLabel = subview;
break;
}
}
}
return self;
}
- (void)dealloc
{
[_regionChangeObserveTimer invalidate];
}
- (void)layoutSubviews
{
[super layoutSubviews];
// Force resize subviews - only the layer is resized by default
CGRect mapFrame = self.frame;
self.frame = CGRectZero;
self.frame = mapFrame;
if (_legalLabel) {
dispatch_async(dispatch_get_main_queue(), ^{
CGRect frame = _legalLabel.frame;
if (_legalLabelInsets.left) {
frame.origin.x = _legalLabelInsets.left;
} else if (_legalLabelInsets.right) {
frame.origin.x = mapFrame.size.width - _legalLabelInsets.right - frame.size.width;
}
if (_legalLabelInsets.top) {
frame.origin.y = _legalLabelInsets.top;
} else if (_legalLabelInsets.bottom) {
frame.origin.y = mapFrame.size.height - _legalLabelInsets.bottom - frame.size.height;
}
_legalLabel.frame = frame;
});
}
}
#pragma mark Accessors
- (void)setShowsUserLocation:(BOOL)showsUserLocation
{
if (self.showsUserLocation != showsUserLocation) {
if (showsUserLocation && !_locationManager) {
_locationManager = [[CLLocationManager alloc] init];
if ([_locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
[_locationManager requestWhenInUseAuthorization];
}
}
[super setShowsUserLocation:showsUserLocation];
// If it needs to show user location, force map view centered
// on user's current location on user location updates
self.followUserLocation = showsUserLocation;
}
}
- (void)setRegion:(MKCoordinateRegion)region
{
// If location is invalid, abort
if (!CLLocationCoordinate2DIsValid(region.center)) {
return;
}
// If new span values are nil, use old values instead
if (!region.span.latitudeDelta) {
region.span.latitudeDelta = self.region.span.latitudeDelta;
}
if (!region.span.longitudeDelta) {
region.span.longitudeDelta = self.region.span.longitudeDelta;
}
// Animate to new position
[super setRegion:region animated:YES];
}
@end