无法将Google Maps Map分配给自定义视图 [英] Can't assign a google maps map to custom view

问题描述

因此，我按照本指南进行操作将Google地图添加到iOS应用程序，一切正常.但是我想做的是分配地图，而不是分配给self.view，而是将自定义视图拖到另一个视图内的故事板上(?)，因为将地图添加到self.view时，我无法添加其他视图元素，例如按钮，或者我可能可以，但我不知道怎么做.

So I followed this guide on how to add a Google map to an iOS application and it all works fine. But what I want to do is assign the map, not to self.view but a custom view I dragged out on to the storyboard inside(?) the other view, because when adding the map to self.view I can't add other elements, like buttons, or well, I probably can but I don't know how.

代码:

// Start locationmanager
locationManager = [[CLLocationManager alloc] init];
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.delegate = self;
[locationManager startUpdatingLocation];

// Set up the startposition for the camera when the app first starts.
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:59.34702 longitude:18.04053 zoom:10];
mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];
self.view = mapView_;

因此，我在当前包含地图的视图内部创建了UIView，然后按住ctrl拖动该视图以在该viewController中创建一个名为mapView的出口.所以我改变了代码行

So i created a UIView inside the view currently containing the map and ctrl dragged it to create an outlet called mapView in that viewController. So i changed the line of code from

self.view = _mapView;

到

self.mapView = _mapView;

，但这似乎根本不起作用，只是空白. self.view和self.mapsView都是UIView的实例，那么为什么这不起作用?

but this does not seem to work at all, just blank. Both self.view and self.mapsView are instances of UIView, so why does this not work?

更新:

这是我的viewDidLoad看起来像atm的样子:

This is what my viewDidLoad looks like atm:

- (void)viewDidLoad
{
[super viewDidLoad];

[self.mapView addSubview:mapView_];

// Start locationmanager
locationManager = [[CLLocationManager alloc] init];
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.delegate = self;
[locationManager startUpdatingLocation];

// Standard cameraposition
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:59.34702 longitude:18.04053 zoom:10];
mapView_ = [GMSMapView mapWithFrame:self.mapView.frame camera:camera];


self.mapView = mapView_;
}

推荐答案

在您的项目中尝试一下:

Try this in your project:

//
//  testViewController.m
//  maps
//
//  Created by Millén on 2013-02-25.
//  Copyright (c) 2013 JamWeb. All rights reserved.
//

#import "testViewController.h"
#import <GoogleMaps/GoogleMaps.h>

@interface testViewController ()
@property(nonatomic, strong) GMSMapView *gMapView;
@end

@implementation testViewController {
    CLLocation *oldLocation;
}

-(void)loadView
{
    CLLocationDegrees lat = 59.34702;
    CLLocationDegrees lon = 18.04053;

    GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:lat longitude:lon zoom:10];
    self.gMapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
    self.gMapView.myLocationEnabled = YES;
    self.view = self.gMapView;

    [self updateLocation];
}

- (void)viewDidLoad
{
    [super viewDidLoad];


    // Start locationmanager
    locationManager = [[CLLocationManager alloc] init];
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.delegate = self;
    [locationManager startUpdatingLocation];


}

- (IBAction)updateLocation {
    [locationManager startUpdatingLocation];
}



- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    CLLocation *location = [locations lastObject];

    /*
    if(!oldLocation)
    {
        oldLocation = location;
    }

    if (![location isEqual:oldLocation]) {
        GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude: location.coordinate.latitude
                                                                longitude: location.coordinate.longitude
                                                                     zoom:7];

        mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];
        mapView_.myLocationEnabled = YES;
        self.view = mapView_;

        oldLocation = location;
        [locationManager stopUpdatingLocation];
    }
     */



    NSLog(@"lat%f - lon%f", location.coordinate.latitude, location.coordinate.longitude);
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

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