Different font for MKAnnotationView

问题:

On the callout bubble on the iPhone SDK's map, can the font be changed for the title and subtitle properties.

I am displeased with the default font shown in the callout bubble, and would like to go with a different font face to match the rest of my application. However, I have not seen much mention of this, which has me concerned that it might not be possible.

I have seen the Building Custom Map Annotation Callouts tutorial, and I guess that would work. But, if at all possible I was hoping that the ability to change a font was built into the MKAnnotationView much the same way I can change the font of a UILabel without subclassing it.

回答1:

You will need to use MKAnnotationView, or subclass it, to change the appearance of the title and subtitle labels as you suggest. If you want to create more re-usable code, I'd subclass and add say properties to query and set the UIFont values to your UILabel instances.

回答2:

Subclass the MKAnnotationView then put the category below on top of its implementation:

@implementation UIFont (SytemFontOverride)

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wobjc-protocol-method-implementation"

+ (UIFont *)boldSystemFontOfSize:(CGFloat)fontSize {

    return [UIFont fontWithName:@"Your-Font-Here" size:fontSize];
}

+ (UIFont *)systemFontOfSize:(CGFloat)fontSize {

    return [UIFont fontWithName:@"Your-Font-Here" size:fontSize];
}

#pragma clang diagnostic pop

@end