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runtime imagery based on annotation title

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This commit is contained in:
Justin R. Miller
2015-07-07 09:09:11 -07:00
committed by Konstantin Käfer
parent e0384a98f7
commit a1c2529e33
1 changed files with 26 additions and 14 deletions
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40
ios/app/MBXViewController.mm
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@@ -342,32 +342,44 @@ mbgl::Settings_NSUserDefaults *settings = nullptr;
- (MGLAnnotationImage *)mapView:(MGLMapView * __nonnull)mapView imageForAnnotation:(id <MGLAnnotation> __nonnull)annotation
{
if ([[((MGLPointAnnotation *)annotation) title] hasSuffix:@"7"])
{
NSLog(@"iOS: %p annotation title ends in '7'; using default sprite", annotation);
NSString *title = [(MGLPointAnnotation *)annotation title];
NSString *lastTwoCharacters = [title substringFromIndex:title.length - 2];
return nil;
}
static NSString *identifier = @"red_square";
MGLAnnotationImage *image = [mapView dequeueReusableAnnotationImageWithIdentifier:identifier];
MGLAnnotationImage *image = [mapView dequeueReusableAnnotationImageWithIdentifier:lastTwoCharacters];
if ( ! image)
{
NSLog(@"iOS: creating sprite for %p / %@", annotation, identifier);
NSLog(@"iOS: creating sprite for %p / '%@'", annotation, lastTwoCharacters);
CGRect rect = CGRectMake(0, 0, 20, 15);
CGRect rect = CGRectMake(0, 0, 20, 20);
UIGraphicsBeginImageContextWithOptions(rect.size, NO, [[UIScreen mainScreen] scale]);
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(ctx, [[[UIColor redColor] colorWithAlphaComponent:0.25] CGColor]);
CGContextSetFillColorWithColor(ctx, [[[UIColor redColor] colorWithAlphaComponent:0.75] CGColor]);
CGContextFillRect(ctx, rect);
image = [MGLAnnotationImage annotationImageWithImage:UIGraphicsGetImageFromCurrentImageContext() reuseIdentifier:identifier];
CGContextSetStrokeColorWithColor(ctx, [[UIColor blackColor] CGColor]);
CGContextStrokeRectWithWidth(ctx, rect, 2);
NSAttributedString *drawString = [[NSAttributedString alloc] initWithString:lastTwoCharacters attributes:@{
NSFontAttributeName: [UIFont fontWithName:@"Arial-BoldMT" size:12],
NSForegroundColorAttributeName: [UIColor whiteColor] }];
CGSize stringSize = drawString.size;
CGRect stringRect = CGRectMake((rect.size.width - stringSize.width) / 2,
(rect.size.height - stringSize.height) / 2,
stringSize.width,
stringSize.height);
[drawString drawInRect:stringRect];
image = [MGLAnnotationImage annotationImageWithImage:UIGraphicsGetImageFromCurrentImageContext() reuseIdentifier:lastTwoCharacters];
UIGraphicsEndImageContext();
}
else
{
NSLog(@"iOS: reusing sprite for %p / %@", annotation, identifier);
NSLog(@"iOS: reusing sprite for %p / '%@'", annotation, lastTwoCharacters);
}
return image;