在iPhone中的Google地图中添加子视图（如UISlider或UIButtom） [英] Adding a subview like UISlider or UIButtom in Google Maps in iPhone

问题描述

我是iOS编程的新手，对COCOA Touch了解甚少。我想在谷歌地图底部的屏幕上添加一个按钮，让用户回到上一个屏幕。我只是知道 UIButton 是 UIView 的子类，我们可以使按钮出现在视图上，使其成为子视图的类。以前，iOS在 MKMapView 中默认使用Google地图，我在互联网上的书籍中看到了一些示例，其中显示了应用程序的屏幕截图，其中会出现按钮或文本框在地图上。但现在只要在界面生成器中拖动按钮就没有帮助。

I am new to iOS Programming and have very little knowledge about COCOA Touch. I am trying to add a button on the screen at the bottom over Google maps for giving an option to the user to go back to the previous screen. I just know that UIButton is a subclass of UIView and we can make button appear on a view by making it the sub view of that class. Previously iOS used to use Google Maps by default by in MKMapView and I have seen examples in books an on the Internet showing screen shots of apps where a button or a text box would appear on the map. But now just dragging the button in the interface builder doesn't help.

这里是我的代码：

ViewController。 h

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <GoogleMaps/GoogleMaps.h>


@interface ViewController : UIViewController 

@property (weak, nonatomic) IBOutlet UIButton *btn;


@end

ViewController.m

#import "ViewController.h"
#import <MapKit/MapKit.h>
#import <GoogleMaps/GoogleMaps.h>
#import <CoreLocation/CoreLocation.h>


@interface ViewController ()

@end

@implementation ViewController
{
    GMSMapView *mapView_;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

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

- (void)loadView
{
    CLLocationManager *locationManager = [[CLLocationManager alloc] init];
    locationManager.distanceFilter = kCLDistanceFilterNone;

    locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
    [locationManager startUpdatingLocation];

    //Latitude and longitude of the current location of the device.
    double lati = locationManager.location.coordinate.latitude;
    double longi = locationManager.location.coordinate.longitude;
    NSLog(@"Latitude = %f", lati);
    NSLog(@"Longitude = %f", longi);

    CLLocation *myLocation = [[CLLocation alloc] initWithLatitude:lati longitude:longi];

    // Create a GMSCameraPosition that tells the map to display the coordinate

    GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:lati
                                                            longitude:longi
                                                                 zoom:11.5];

    mapView_ = [GMSMapView mapWithFrame:[[UIScreen mainScreen] bounds] camera:camera];
    mapView_.myLocationEnabled = YES;
    self.view = mapView_;

    // Creates a marker in the center of the map.
    GMSMarker *marker = [[GMSMarker alloc] init];
    marker.position = CLLocationCoordinate2DMake(lati, longi);
    marker.title = @"It's Me";
    marker.snippet = @"My Location";
    marker.map = mapView_;

    [mapView_ addSubview:_btn];
    [mapView_ bringSubviewToFront:_btn];

}

@end

推荐答案

在当前视图上执行正常的UI构建，然后将 GMSMapView 添加为子视图（在索引 self.view （不要做 self.view = mapView; ）

Do normal UI building on your current view, then add the GMSMapView as subview (at index 0) of the self.view (DON'T do self.view = mapView;)

以下是重要代码：

mapView = [GMSMapView mapWithFrame:self.view.bounds camera:camera];
[self.view insertSubview:mapView atIndex:0];

在 index 0插入地图检视将其余对象设置在前面。

Inserting the map view at index 0 will set the rest of the objects in front.

这篇关于在iPhone中的Google地图中添加子视图（如UISlider或UIButtom）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！