地理编码的实现

<code class="hljs java has-numbering"></code><h2 id="一效果">一：效果</h2><p>输入地名，可以得到相应的经纬度，知识为了学习写的小Demo <img src="http://img.blog.csdn.net/20150822150215458" alt="这里写图片描述" title="" /></p><h2 id="二实现步骤">二：实现步骤</h2><p>一 ：首先获取用户输入的位置。 二 ：创建地理编码对象。 三 ：利用地理编码对象编码，根据传入的地址获取该地址对应的经纬度信息。 四 ：最后将他们分别显示出来就可以了。</p><h2 id="三代码">三：代码</h2>#<span class="hljs-keyword">import</span> <span class="hljs-string">"ViewController.h"</span>#<span class="hljs-keyword">import</span> <CoreLocation/CoreLocation.h><span class="hljs-annotation">@interface</span> ViewController ()#pragma mark - 地理编码<span class="hljs-javadoc">/** *  监听地理编码点击事件 */</span>- (IBAction)geocodeBtnClick;<span class="hljs-javadoc">/** *  需要编码的地址容器 */</span><span class="hljs-annotation">@property</span> (weak, nonatomic) IBOutlet UITextField *addressField;<span class="hljs-javadoc">/** *  经度容器 */</span><span class="hljs-annotation">@property</span> (weak, nonatomic) IBOutlet UILabel *longitudeLabel;<span class="hljs-javadoc">/** *  纬度容器 */</span><span class="hljs-annotation">@property</span> (weak, nonatomic) IBOutlet UILabel *latitudeLabel;<span class="hljs-javadoc">/** *  详情容器 */</span><span class="hljs-annotation">@property</span> (weak, nonatomic) IBOutlet UILabel *detailAddressLabel;<span class="hljs-javadoc">/** *  地理编码对象 */</span><span class="hljs-annotation">@property</span> (nonatomic ,strong) CLGeocoder *geocoder;<span class="hljs-annotation">@end</span><span class="hljs-annotation">@implementation</span> ViewController- (<span class="hljs-keyword">void</span>)geocodeBtnClick{    <span class="hljs-comment">// 0.获取用户输入的位置</span>    NSString *addressStr = self.addressField.text;    <span class="hljs-keyword">if</span> (addressStr == nil || addressStr.length == <span class="hljs-number">0</span>) {        NSLog(@<span class="hljs-string">"请输入地址"</span>);        <span class="hljs-keyword">return</span>;    }    <span class="hljs-comment">// 1.创建地理编码对象</span>    <span class="hljs-comment">// 2.利用地理编码对象编码</span>    <span class="hljs-comment">// 根据传入的地址获取该地址对应的经纬度信息</span>    [self.geocoder geocodeAddressString:addressStr completionHandler:^(NSArray *placemarks, NSError *error) {        <span class="hljs-keyword">if</span> (placemarks.count == <span class="hljs-number">0</span> || error != nil) {            <span class="hljs-keyword">return</span> ;        }        <span class="hljs-comment">// placemarks地标数组, 地标数组中存放着地标, 每一个地标包含了该位置的经纬度以及城市/区域/国家代码/邮编等等...</span>        <span class="hljs-comment">// 获取数组中的第一个地标</span>        CLPlacemark *placemark = [placemarks firstObject];<span class="hljs-comment">//        for (CLPlacemark  *placemark in placemarks) {</span><span class="hljs-comment">//            NSLog(@"%@ %@ %f %f", placemark.name, placemark.addressDictionary, placemark.location.coordinate.latitude, placemark.location.coordinate.longitude);</span>        self.latitudeLabel.text = [NSString stringWithFormat:@<span class="hljs-string">"%f"</span>, placemark.location.coordinate.latitude];        self.longitudeLabel.text = [NSString stringWithFormat:@<span class="hljs-string">"%f"</span>, placemark.location.coordinate.longitude];        NSArray *address = placemark.addressDictionary[@<span class="hljs-string">"FormattedAddressLines"</span>];        NSMutableString *strM = [NSMutableString string];        <span class="hljs-keyword">for</span> (NSString *str in address) {            [strM appendString:str];        }        self.detailAddressLabel.text = strM;<span class="hljs-comment">//        }</span>    }];}- (CLGeocoder *)geocoder{    <span class="hljs-keyword">if</span> (!_geocoder) {        _geocoder = [[CLGeocoder alloc] init];    }    <span class="hljs-keyword">return</span> _geocoder;}-(<span class="hljs-keyword">void</span>)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{    <span class="hljs-comment">//隐藏键盘</span>    [self.view endEditing:YES];}<span class="hljs-annotation">@end</span>