116 lines
3.7 KiB
Objective-C
Executable File
116 lines
3.7 KiB
Objective-C
Executable File
/*
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* Copyright 2016 Google Inc. All rights reserved.
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*
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under
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* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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* ANY KIND, either express or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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#import "GoogleMapsDemos/Samples/PolylinesViewController.h"
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#import <GoogleMaps/GoogleMaps.h>
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@interface GMSPolyline (length)
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@property(nonatomic, readonly) double length;
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@end
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@implementation GMSPolyline (length)
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- (double)length {
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GMSLengthKind kind = [self geodesic] ? kGMSLengthGeodesic : kGMSLengthRhumb;
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return [[self path] lengthOfKind:kind];
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}
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@end
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static CLLocationCoordinate2D kSydneyAustralia = {-33.866901, 151.195988};
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static CLLocationCoordinate2D kHawaiiUSA = {21.291982, -157.821856};
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static CLLocationCoordinate2D kFiji = {-18, 179};
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static CLLocationCoordinate2D kMountainViewUSA = {37.423802, -122.091859};
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static CLLocationCoordinate2D kLimaPeru = {-12, -77};
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static bool kAnimate = true;
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@implementation PolylinesViewController {
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NSArray *_styles;
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NSArray *_lengths;
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NSArray *_polys;
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double _pos, _step;
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GMSMapView *_mapView;
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}
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- (void)tick {
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for (GMSPolyline *poly in _polys) {
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poly.spans =
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GMSStyleSpansOffset(poly.path, _styles, _lengths, kGMSLengthGeodesic, _pos);
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}
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_pos -= _step;
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if (kAnimate) {
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__weak id weakSelf = self;
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dispatch_after(dispatch_time(DISPATCH_TIME_NOW, NSEC_PER_SEC / 10),
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dispatch_get_main_queue(),
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^{ [weakSelf tick]; });
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}
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}
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- (void)initLines {
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if (!_polys) {
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NSMutableArray *polys = [NSMutableArray array];
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GMSMutablePath *path = [GMSMutablePath path];
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[path addCoordinate:kSydneyAustralia];
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[path addCoordinate:kFiji];
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[path addCoordinate:kHawaiiUSA];
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[path addCoordinate:kMountainViewUSA];
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[path addCoordinate:kLimaPeru];
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[path addCoordinate:kSydneyAustralia];
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path = [path pathOffsetByLatitude:-30 longitude:0];
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_lengths = @[@([path lengthOfKind:kGMSLengthGeodesic] / 21)];
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for (int i = 0; i < 30; ++i) {
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GMSPolyline *poly = [[GMSPolyline alloc] init];
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poly.path = [path pathOffsetByLatitude:(i * 1.5) longitude:0];
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poly.strokeWidth = 8;
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poly.geodesic = YES;
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poly.map = _mapView;
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[polys addObject:poly];
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}
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_polys = polys;
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}
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}
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- (void)viewDidLoad {
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[super viewDidLoad];
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GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-30
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longitude:-175
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zoom:3];
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GMSMapView *mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
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mapView.accessibilityElementsHidden = YES;
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self.view = mapView;
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_mapView = mapView;
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CGFloat alpha = 1;
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UIColor *green = [UIColor colorWithRed:0 green:1 blue: 0 alpha:alpha];
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UIColor *greenTransp = [UIColor colorWithRed:0 green:1 blue: 0 alpha:0];
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UIColor *red = [UIColor colorWithRed:1 green:0 blue: 0 alpha:alpha];
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UIColor *redTransp = [UIColor colorWithRed:1 green:0 blue: 0 alpha:0];
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GMSStrokeStyle *grad1 = [GMSStrokeStyle gradientFromColor:green toColor:greenTransp];
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GMSStrokeStyle *grad2 = [GMSStrokeStyle gradientFromColor:redTransp toColor:red];
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_styles = @[
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grad1,
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grad2,
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[GMSStrokeStyle solidColor:[UIColor colorWithWhite:0 alpha:0]],
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];
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_step = 50000;
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[self initLines];
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[self tick];
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}
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@end
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