我在xcode中尝试了一些东西，并将此代码用于我的MapView。Noknownclassmethodforselector'setRegion:animated:'我用3个.h和.m文件制作了三个ViewController。我的错误是什么？.m#import"myPlacesAllTime.h"#import@interfacemyPlacesAllTime()@end@implementationmyPlacesAllTime-(id)initWithNibName:(NSString*)nibNameOrNilbundle:(NSBundle*)nibBundleOrNil{s