我正在创建一个应用程序,需要显示我的位置的一部分地区的区域图像,类似下面的图像。单击此图像将使我的应用程序进一步运行。但这只是一个静态图像,根据我的经度和纬度生成。希望能得到任何帮助。谢谢。
以下是正常运行的代码,如果还有人在寻找答案。
NSString *staticMapUrl = [NSString stringWithFormat:@"http://maps.google.com/maps/api/staticmap?markers=color:red|%f,%f&%@&sensor=true",yourLatitude, yourLongitude,@"zoom=10&size=270x70"];
NSURL *mapUrl = [NSURL URLWithString:[staticMapUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
UIImage *image = [UIImage imageWithData: [NSData dataWithContentsOfURL:mapUrl]];
谢谢
NSString *urlString = @"http://maps.googleapis.com/maps/api/staticmap?center=Berkeley,CA&zoom=14&size=200x200&sensor=false";
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlString]];
UIImage *imageData = [UIImage imageWithData:data];
[yourImageView setImage:imageData];
通过这个功能,您可以基于您的坐标获取静态图像。 但是很遗憾地告诉你,注释的自定义可能不可行。
MKMapSnapshotter
,它允许您对地图进行截屏;MKMapSnapshotOptions * snapOptions= [[MKMapSnapshotOptions alloc] init];
self.options=snapOptions;
CLLocation * Location = [[CLLocation alloc] initWithLatitude:self.lat longitude:self.long];
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(Location.coordinate, 300, 300);
self.options.region = region;
self.options.size = self.view.frame.size;
self.options.scale = [[UIScreen mainScreen] scale];
MKMapSnapshotter * mapSnapShot = [[MKMapSnapshotter alloc] initWithOptions:self.options];
[mapSnapshotter startWithCompletionHandler:^(MKMapSnapshot *snapshot, NSError *error) {
if (error) {
NSLog(@"[Error] %@", error);
return;
}
UIImage *image = snapshot.image;//map image
NSData *data = UIImagePNGRepresentation(image);
}];
http://code.google.com/apis/maps/articles/tutorial-iphone.html
我最喜欢的 iOS 博客之一有一个MapKit 教程在这里:
我想补充一下@DevC的答案,提供一个带有完成块的方法,可以在图像中间添加注释。起初,我想看看是否可以在快照开始之前添加注释,但是MKMapSnapshotter
不支持此功能(链接)。因此,我想出的解决方案是创建一个标记,在地图图像顶部绘制它,然后创建另一个包含地图和标记的图像。这是我的自定义方法:
-(void)create_map_screenshot:(MKCoordinateRegion)region :(map_screenshot_completion)map_block {
// Set the map snapshot properties.
MKMapSnapshotOptions *snap_options = [[MKMapSnapshotOptions alloc] init];
snap_options.region = region;
snap_options.size = // Set the frame size e.g.: custom_view.frame.size;
snap_options.scale = [[UIScreen mainScreen] scale];
// Initialise the map snapshot camera.
MKMapSnapshotter *map_camera = [[MKMapSnapshotter alloc] initWithOptions:snap_options];
// Take a picture of the map.
[map_camera startWithCompletionHandler:^(MKMapSnapshot *snapshot, NSError *error) {
// Check if the map image was created.
if ((error == nil) && (snapshot.image != nil)) {
// Create the pin image view.
MKAnnotationView *pin = [[MKPinAnnotationView alloc] initWithAnnotation:nil reuseIdentifier:nil];
// Get the map image data.
UIImage *image = snapshot.image;
// Create a map + location pin image.
UIGraphicsBeginImageContextWithOptions(image.size, YES, image.scale); {
[image drawAtPoint:CGPointMake(0.0f, 0.0f)];
CGRect rect = CGRectMake(0.0f, 0.0f, image.size.width, image.size.height);
// Create the pin co-ordinate point.
CGPoint point = [snapshot pointForCoordinate:region.center];
if (CGRectContainsPoint(rect, point)) {
// Draw the pin in the middle of the map.
point.x = (point.x + pin.centerOffset.x - (pin.bounds.size.width / 2.0f));
point.y = (point.y + pin.centerOffset.y - (pin.bounds.size.height / 2.0f));
[pin.image drawAtPoint:point];
}
}
// Get the new map + pin image.
UIImage *map_plus_pin = UIGraphicsGetImageFromCurrentImageContext();
// Return the new image data.
UIGraphicsEndImageContext();
map_block(map_plus_pin);
}
else {
map_block(nil);
}
}];
}
这个方法还需要声明一个完成头,像这样:
typedef void(^map_screenshot_completion)(UIImage *);
我希望这对于想要向地图图像添加注释的人们有所帮助。