109 lines
3.6 KiB
Objective-C
Executable File
109 lines
3.6 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/SnapshotReadyViewController.h"
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#import <GoogleMaps/GoogleMaps.h>
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@interface SnapshotReadyViewController ()<GMSMapViewDelegate>
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@end
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@implementation SnapshotReadyViewController {
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GMSMapView *_mapView;
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UILabel *_statusLabel;
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UIBarButtonItem *_waitButton;
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BOOL _isAwaitingSnapshot;
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}
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- (void)viewDidLoad {
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[super viewDidLoad];
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GMSCameraPosition *camera =
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[GMSCameraPosition cameraWithLatitude:-33.868 longitude:151.2086 zoom:6];
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_mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
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_mapView.delegate = self;
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self.view = _mapView;
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// Add status label, initially hidden.
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_statusLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 0, 30)];
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_statusLabel.alpha = 0.0f;
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_statusLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth;
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_statusLabel.backgroundColor = [UIColor blueColor];
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_statusLabel.textColor = [UIColor whiteColor];
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_statusLabel.textAlignment = NSTextAlignmentCenter;
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// Add a wait button to signify on the next SnapshotReady event, a screenshot of the map will
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// be taken.
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_waitButton = [[UIBarButtonItem alloc] initWithTitle:@"Wait for snapshot"
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style:UIBarButtonItemStylePlain
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target:self
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action:@selector(didTapWait)];
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self.navigationItem.rightBarButtonItems = @[ _waitButton ];
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[_mapView addSubview:_statusLabel];
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}
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#pragma mark GMSMapViewDelegate
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- (void)mapViewSnapshotReady:(GMSMapView *)mapView {
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if (_isAwaitingSnapshot) {
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_isAwaitingSnapshot = NO;
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_waitButton.enabled = YES;
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_waitButton.title = @"Wait for snapshot";
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[self takeSnapshot];
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}
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_statusLabel.alpha = 0.8f;
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_statusLabel.text = @"Snapshot Ready";
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// Remove status label after 1 second.
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UILabel *statusLabel = _statusLabel;
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dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 1 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
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statusLabel.alpha = 0.0f;
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});
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}
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#pragma mark Private
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- (void)didTapWait {
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_isAwaitingSnapshot = YES;
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_waitButton.enabled = NO;
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_waitButton.title = @"Waiting";
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}
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- (void)takeSnapshot {
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// Take a snapshot of the map.
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UIGraphicsBeginImageContextWithOptions(_mapView.bounds.size, YES, 0);
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[_mapView drawViewHierarchyInRect:_mapView.bounds afterScreenUpdates:YES];
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UIImage *mapSnapShot = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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// Put snapshot image into an UIImageView and overlay on top of map.
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UIImageView *imageView = [[UIImageView alloc] initWithImage:mapSnapShot];
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imageView.layer.borderColor = [UIColor redColor].CGColor;
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imageView.layer.borderWidth = 10.0f;
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[_mapView addSubview:imageView];
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// Remove imageView after 1 second.
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dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 1 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
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[UIView animateWithDuration:1
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animations:^{
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imageView.alpha = 0.0f;
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}
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completion:^(BOOL finished) {
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[imageView removeFromSuperview];
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}];
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});
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}
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@end
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