如何在自定义MKAnnotationView上正确设置半径并允许标注?这引发了一个例外:
从我的自定义MKAnnotationView类:
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
self.frame = CGRectMake(0, 0, 30, 30);
self.opaque = NO;
self.multipleTouchEnabled = NO;
self.backgroundColor = [UIColor whiteColor];
self.layer.cornerRadius = 5;
self.layer.masksToBounds = YES;
self.layer.borderColor = [UIColor blueColor].CGColor;
self.layer.borderWidth = 1.0f;
self.layer.shadowOffset = CGSizeMake(1, 0);
self.layer.shadowColor = [[UIColor blackColor] CGColor];
self.layer.shadowRadius = 5;
self.layer.shadowOpacity = .25;
}
return self;
}
在我的班级中提供地图视图:
- (MKAnnotationView *)mapView:(MKMapView *)mView viewForAnnotation:(id <MKAnnotation>)annotation
{
// logic to dequeue annotation views, etc.
annotationView.canShowCallout = YES;
return annotationView;
}
例外:
*由于未捕获的异常'NSGenericException'而终止应用,原因:'&gt;无法显示带有clipsToBounds的标注' * 第一次抛出调用堆栈: (0x1c04012 0x1689e7e 0x4eab5f 0x4ebcaf 0x4ebaea 0x4ebf03 0x4d7e24 0x4d7e54 0x4da610 0x5a7e 0x221853f 0x222a014 0x221a7d5 0x1baaaf5 0x1ba9f44 0x1ba9e1b 0x1a617e3 0x1a61668 0x5cdffc 0x29ad 0x28d5) libc ++ abi.dylib:terminate调用抛出异常 (lldb)
答案 0 :(得分:2)
-(MKAnnotationView *)annotationView{
annotationView.image=[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:profilePictureString]]];
annotationView.canShowCallout = NO;
annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeInfoDark];
annotationView.frame = CGRectMake(0, 0, 50,50);
annotationView.layer.cornerRadius = 25;
annotationView.layer.masksToBounds = YES;
annotationView.contentMode = UIViewContentModeScaleAspectFit;
return annotationView;
}
答案 1 :(得分:1)
我找到了解决方案。我创建了一个具有清晰颜色的OuterAnnotationView,并在初始化时向OuterAnnotationView添加了一个子视图。我添加的子视图(内部)我可以设置 cornerRadius和masksToBounds = YES,现在一切正常。
答案 2 :(得分:0)
在您的代码中,重写:
self.layer.masksToBounds = NO;