前言
学习地图,我们必须要接触两个框架:
Core Location,主要包含定位、地理编码、反编码功能,如需了解请移步iOS开发之地图-定位/编码与反编码
MapKit,利用他可以对地图进行精准的控制,比如,放置大头针、地图类型切换,导航等等。
本文我们主要介绍的是使用MapKit框架对地图试图进行精准的控制。
如果无法显示自己的位置,检查以下几点:
是否将定位管理器设为全局变量
是否在项目中进行定位授权,是否在Info.plist中配置
是否将showsUserLocation设为YES。
是否配置模拟器 点击模拟器 -> 菜单栏Dubug -> Location -> Apple来使模拟器定位,然后使用Custom Location配置模拟器的经纬度。
添加多个大头针及自定义大头针视图代码示例:
此链接下是自定义大头针的Demo可自行下载
ViewController.m(.h声明文件中没有写代码)
//
// ViewController.m
// CustomeAnnotationView
//
// Created by 王龙 on 16/3/19.
// Copyright © 2016年 Larry(Lawrence). All rights reserved.
//
#import "ViewController.h"
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
#import "MyAnnotation.h"
#import "CustomPinAnnotationView.h"
@interface ViewController ()<MKMapViewDelegate>
{
CLLocationManager *_locationManager;
MKMapView *_mapView;
}
@property (nonatomic,retain) NSMutableArray *locationArray;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// 定位授权
_locationManager = [[CLLocationManager alloc]init];
[_locationManager requestWhenInUseAuthorization];
// 地图视图
_mapView = [[MKMapView alloc]initWithFrame:self.view.frame];
_mapView.showsUserLocation = YES;
_mapView.delegate = self;
[self.view addSubview:_mapView];
}
- (void)loadData{
NSString *filePath = [[NSBundle mainBundle]pathForResource:@"PinData" ofType:@"plist"];
NSArray *tempArray = [NSArray arrayWithContentsOfFile:filePath];
// 把plist数据转换成大头针model
for (NSDictionary *dict in tempArray) {
MyAnnotation *myAnnotationModel = [[MyAnnotation alloc]initWithAnnotationModelWithDict:dict];
[self.locationArray addObject:myAnnotationModel];
}
// 核心代码
[_mapView addAnnotations:self.locationArray];
}
#pragma mark ------ delegate
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{
userLocation.title =@"你好";
_mapView.centerCoordinate = userLocation.coordinate;
[_mapView setRegion:MKCoordinateRegionMake(userLocation.coordinate, MKCoordinateSpanMake(0.3, 0.3)) animated:YES];
// 如果在ViewDidLoad中调用 添加大头针的话会没有掉落效果 定位结束后再添加大头针才会有掉落效果
[self loadData];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation{
/*
* 大头针分两种
* 1. MKPinAnnotationView:他是系统自带的大头针,继承于MKAnnotationView,形状跟棒棒糖类似,可以设置糖的颜色,和显示的时候是否有动画效果
* 2. MKAnnotationView:可以用指定的图片作为大头针的样式,但显示的时候没有动画效果,如果没有给图片的话会什么都不显示
* 3. mapview有个代理方法,当大头针显示在试图上时会调用,可以实现这个方法来自定义大头针的动画效果,我下面写有可以参考一下
* 4. 在这里我为了自定义大头针的样式,使用的是MKAnnotationView
*/
// 判断是不是用户的大头针数据模型
if ([annotation isKindOfClass:[MKUserLocation class]]) {
MKAnnotationView *annotationView = [[MKAnnotationView alloc]init];
annotationView.image = [UIImage imageNamed:@"acc"];
// 是否允许显示插入视图*********
annotationView.canShowCallout = YES;
return annotationView;
}
CustomPinAnnotationView *annotationView = (CustomPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:@"otherAnnotationView"];
if (annotationView == nil) {
annotationView = [[CustomPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:@"otherAnnotationView"];
}
MyAnnotation *myAnnotation = annotation;
switch ([myAnnotation.type intValue]) {
case SUPER_MARKET:
annotationView.image = [UIImage imageNamed:@"super"];
annotationView.label.text = @"超市";
break;
case CREMATORY:
annotationView.image = [UIImage imageNamed:@"chang"];
annotationView.label.text = @"火场";
break;
case INTEREST:
annotationView.image = [UIImage imageNamed:@"jingqu"];
annotationView.label.text = @"风景区";
break;
default:
break;
}
return annotationView;
}
//大头针显示在视图上时调用,在这里给大头针设置显示动画
- (void)mapView:(MKMapView *)mapView didAddAnnotationViews:(NSArray<MKAnnotationView *> *)views{
// 获得mapView的Frame
CGRect visibleRect = [mapView annotationVisibleRect];
for (MKAnnotationView *view in views) {
CGRect endFrame = view.frame;
CGRect startFrame = endFrame;
startFrame.origin.y = visibleRect.origin.y - startFrame.size.height;
view.frame = startFrame;
[UIView beginAnimations:@"drop" context:NULL];
[UIView setAnimationDuration:1];
view.frame = endFrame;
[UIView commitAnimations];
}
}
#pragma mark lazy load
- (NSMutableArray *)locationArray{
if (_locationArray == nil) {
_locationArray = [NSMutableArray new];
}
return _locationArray;
}
@end
MyAnnotation.h中
//
// MyAnnotation.h
// CustomeAnnotationView
//
// Created by 王龙 on 16/3/19.
// Copyright © 2016年 Larry(Lawrence). All rights reserved.
//
#import <Foundation/Foundation.h>
//注意导入框架
#import <MapKit/MapKit.h>
/**
* 大头针枚举
*/
typedef NS_ENUM(NSInteger,PinType) {
/**
* 超市
*/
SUPER_MARKET = 0,
/**
* 火场
*/
CREMATORY,
/**
* 景点
*/
INTEREST,
};
//该模型是大头针模型 所以必须实现协议MKAnnotation协议 和CLLocationCoordinate2D中的属性coordinate
@interface MyAnnotation : NSObject<MKAnnotation>
@property (nonatomic,assign) CLLocationCoordinate2D coordinate;
@property (nonatomic,copy) NSString *name;
@property (nonatomic,copy) NSString *title;
@property (nonatomic,retain) NSNumber *type;
- (instancetype)initWithAnnotationModelWithDict:(NSDictionary *)dict;
@end
MyAnnotation.m中
//
// MyAnnotation.m
// CustomeAnnotationView
//
// Created by 王龙 on 16/3/19.
// Copyright © 2016年 Larry(Lawrence). All rights reserved.
//
#import "MyAnnotation.h"
@implementation MyAnnotation
- (instancetype)initWithAnnotationModelWithDict:(NSDictionary *)dict{
self = [super init];
if (self) {
self.coordinate = CLLocationCoordinate2DMake([dict[@"coordinate"][@"latitute"] doubleValue], [dict[@"coordinate"][@"longitude"] doubleValue]);
self.title = dict[@"detail"];
self.name = dict[@"name"];
self.type = dict[@"type"];
}
return self;
}
@end
CustomPinAnnotationView.h中
//
// CustomPinAnnotationView.h
// CustomeAnnotationView
//
// Created by 王龙 on 16/3/19.
// Copyright © 2016年 Larry(Lawrence). All rights reserved.
//
#import <MapKit/MapKit.h>
#import "MyAnnotation.h"
@interface CustomPinAnnotationView : MKAnnotationView
@property (nonatomic,strong) UILabel *label;
@end
CustomPinAnnotationView.m中
//
// CustomPinAnnotationView.m
// CustomeAnnotationView
//
// Created by 王龙 on 16/3/19.
// Copyright © 2016年 Larry(Lawrence). All rights reserved.
//
#import "CustomPinAnnotationView.h"
@implementation CustomPinAnnotationView
- (instancetype)initWithAnnotation:(id<MKAnnotation>)annotation reuseIdentifier:(NSString *)reuseIdentifier{
self = [super initWithAnnotation:annotation reuseIdentifier:reuseIdentifier];
if (self) {
// 在大头针旁边加一个label
self.label = [[UILabel alloc]initWithFrame:CGRectMake(0, -15, 50, 20)];
self.label.textColor = [UIColor redColor];
self.label.textAlignment = NSTextAlignmentCenter;
self.label.font = [UIFont systemFontOfSize:20];
[self addSubview:self.label];
}
return self;
}
@end
网友评论
我最近也在弄
```
MyAnnotation *annotation = [MyAnnotation new];
annotation.coordinate = locCoordinateA;
annotation.title = @"wode";
annotation.boundingMapRect = MKMapRectMake(1.0, 1.0, 50, 50);
[mapView addOverlay:annotation level:MKOverlayLevelAboveLabels];
```
if (annotationView == nil)
{
annotationView = [[CustomPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:@"otherAnnotationView"];
}
MyAnnotation *myAnnotation = annotation;
switch ([myAnnotation.type intValue]) {
case SUPER_MARKET:
annotationView.image = [UIImage imageNamed:@"super"];
annotationView.label.text = @"超市";
break;
case CREMATORY:
annotationView.image = [UIImage imageNamed:@"chang"];
annotationView.label.text = @"火场";
break;
case INTEREST:
annotationView.image = [UIImage imageNamed:@"jingqu"];
annotationView.label.text = @"风景区";
break;
default:
break;
}
return annotationView;