MapKitexpress
if 条件1,条件2,条件3 {}spa
switch discipline { case 条件1,条件2 : }3d
do {ip
try <#throwing expression#>ci
} catch <#pattern#> {it
<#statements#>io
}class
MKMapViewmargin
MKPinAnnotationView di
MKAnnotation
MKMapItem
MKPlacemark