如何从任何城市或地名设置地图位置 [英] How to set Map location from any city or place name

问题描述

这是我获取当前位置的方式。

  NSString * lat = [[NSString alloc] initWithFormat：@ ％F，locationManager.location.coordinate.latitude]; 
 NSString * lon = [[NSString alloc] initWithFormat：@％f，locationManager.location.coordinate.longitude]; 
 
 NSString * URL = [NSString stringWithFormat：@http://maps.google.com/maps/geo?q=%@,%@&output=csv&sensor=false，纬度，经度]; 
 NSURLRequest * rq = [NSURLRequest requestWithURL：[NSURL URLWithString：URL]]; 
 con = [[NSURLConnection alloc] initWithRequest：rq delegate：self]; 
 webData = [[NSMutableData data] retain]; 
  

并在连接委托方法中获取当前位置名称 200,9， 印度马哈拉施特拉邦，印度马哈拉施特拉邦，印度孟买Wadala的IITI计算机教育。

现在我的问题是如何在同一个地方设置注释在地图上使用我以前得到的字符串地名。

预先致谢

解决方案<

  #import< Foundation / /> 
首先制作一个目标c类，让你的.h文件看起来像下面这样： Foundation.h> 
 #import< Mapkit / MKAnnotation.h> 
 @interface注解：NSObject< MKAnnotation> 
 
 {
 CLLocationCoordinate2D坐标; 
 NSString * title; 
 NSString *副标题; 
 
} 
 
 @property（nonatomic，assign）CLLocationCoordinate2D坐标; 
 @property（非原子，复制）NSString * title; 
 @property（非原子，复制）NSString *副标题; 
 
 @end 
  

现在在.m文件中

  #importannotation.h
 
 @implementation注解
 
 @synthesize坐标，标题，字幕; 
 
 @end 
  

现在在你的controller.m文件中你想要

  #importannotation.h
  

现在您可以使用以下函数向任何坐标添加注解

   - （void）addAnnotations {
 
 annotation * userPositionAnnote = [[annotation alloc] init]; 
 userPositionAnnote.title = @我的当前位置; 
 userPositionAnnote.coordinate = SetYourCordinates; //在这里设置你的坐标，你想添加注释
 
 [YourMap addAnnotation：userPositionAnnote]; 
 
 MKCoordinateRegion region = {{0.0,0.0}，{0.0,0.0}}; 
 region.center = userPositionAnnote.coordinate; 
 region.span.longitudeDelta = 0.001; 
 region.span.latitudeDelta = 0.001; 
 
 [YourMap setRegion：region animated：YES]; 
} 
  

希望这可以帮助您

This is the way where I am taking the current location

    NSString* lat = [[NSString alloc]initWithFormat:@"%f",locationManager.location.coordinate.latitude];
NSString* lon = [[NSString alloc]initWithFormat:@"%f",locationManager.location.coordinate.longitude];

    NSString *URL = [NSString stringWithFormat:@"http://maps.google.com/maps/geo?q=%@,%@&output=csv&sensor=false",lat,lon];
    NSURLRequest *rq = [NSURLRequest requestWithURL:[NSURL URLWithString:URL]];
    con = [[NSURLConnection alloc] initWithRequest:rq delegate:self];
    webData = [[NSMutableData data] retain];

and in the connection delegate method I am getting the current location name.200,9,"IITI Computer Education, Wadala, Mumbai, Maharashtra 400067, India" in the simulator.

Now my question is How can we set annotation on the same place in the map using the string place name which I got previously.

Thanks in advance

解决方案

First make an objective c class make your .h file look like following

 #import <Foundation/Foundation.h>
 #import <Mapkit/MKAnnotation.h>
 @interface annotation : NSObject <MKAnnotation>

 {
  CLLocationCoordinate2D coordinate;
  NSString *title;
  NSString *subtitle;

 }

   @property(nonatomic, assign) CLLocationCoordinate2D coordinate;
   @property(nonatomic, copy) NSString *title;
   @property(nonatomic, copy) NSString *subtitle;

  @end

Now in .m file

#import "annotation.h"

@implementation annotation

@synthesize  coordinate,title,subtitle;

@end

Now in your controller.m file where you want to add an annotaion make an import of above file

#import "annotation.h"

now you can use the following function to add anotation to any cordinate

-(void)addAnnotations{

annotation *userPositionAnnote = [[annotation alloc]init];
userPositionAnnote.title = @"My Current Position";
userPositionAnnote.coordinate = SetYourCordinates; // set your cordinates here where you want to add annotaion

[YourMap addAnnotation:userPositionAnnote];

MKCoordinateRegion region = {{0.0,0.0}, {0.0,0.0}};
region.center = userPositionAnnote.coordinate;
region.span.longitudeDelta = 0.001;
region.span.latitudeDelta = 0.001;

[YourMap setRegion:region animated:YES];
}

hope this will help you

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