如何在IOS中的地图中添加Pin和注释？

如何在ios中的地图中添加Pin和注释？

#导入
#import <MapKit/MapKit.h>   

@property (strong, nonatomic) IBOutlet MKMapView *mapvie;   //insert the one map view

@属性（强，非原子）IBMMapView*mapvie//插入一个地图视图

在.m文件中

NSMutableArray *allocations=[[NSMutableArray alloc]init];

NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.cbapcertprep.com/service/index.php?/Download_vehicletrack/DownloadTrackData/35170"]];

[request setHTTPMethod:@"GET"];

[request setValue:@"application/json;charset=UTF-8" forHTTPHeaderField:@"content-type"];

NSError *err;
NSURLResponse *response;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];

NSArray *largeArray= [NSJSONSerialization JSONObjectWithData:responseData options: NSJSONReadingMutableContainers error: &err];

NSArray *smallArray = [largeArray subarrayWithRange:NSMakeRange(0, 20)]; //this is range for what the result u need



for (int i=0; i<[smallArray count]; i++) {
     CLLocationCoordinate2D annotationCoord;

    MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc] init];
    annotationCoord.latitude = [[[smallArray objectAtIndex:i]objectForKey:@"latitude"]doubleValue ];
    annotationCoord.longitude = [[[smallArray objectAtIndex:i]objectForKey:@"longitude"] doubleValue];

    annotationPoint.coordinate = annotationCoord;
    annotationPoint.title = [[smallArray objectAtIndex:i]objectForKey:@"address"];

    [allocations addObject:annotationPoint];


    MKCoordinateRegion myRegion;
    MKCoordinateSpan span;

    span.latitudeDelta=THE_SPAN;
    span.longitudeDelta=THE_SPAN;

    myRegion.center=annotationCoord;
    myRegion.span=span;

    [self.mapvie setRegion:myRegion animated:YES];

}


[self.mapvie addAnnotations:allocations];

NSMutableArray*分配=[[NSMutableArray alloc]init]；
NSMutableURLRequest*请求=[NSMutableUrlRequestRequestWithURL:[NSURL URLWithString:@]http://www.cbapcertprep.com/service/index.php?/Download_vehicletrack/DownloadTrackData/35170"]];
[请求设置HttpMethod:@“获取”]；
[request setValue:@“application/json；charset=UTF-8”forHTTPHeaderField:@“content type”]；
n错误*错误；
NSURLResponse*响应；
NSData*responseData=[NSURLConnection sendSynchronousRequest:request ReturnInResponse:&响应错误：&错误]；
NSArray*largeArray=[NSJSONSerialization JSONObjectWithData:responseData选项：NSJSONReadingMutableContainers错误：&err]；
NSArray*smallArray=[largeArray subraywithrange:NSMakeRange（0,20）]//这是你需要的结果的范围
对于（int i=0；i@Anbu.Karthik在该文件中，我尝试了它，但映射区域将自动更改。您的输出包含总计2643个索引，现在您需要显示的结果mapvie@Anbu.Karthik使用该日志，lat在地图上放置管脚？是的，我知道你的点，但是你的url显示2643值，你需要在你的url中显示2643管脚点map@Anbu.Karthik只有f前20分