旋转的图片（MainPageViewDemo)

#import <UIKit/UIKit.h>

@class MainPageView;
@interface RootViewController : UIViewController
{
    MainPageView* mainPageView;
}
@property (nonatomic,retain) MainPageView* mainPageView;
@end

#import "RootViewController.h"
//加入头文件
#import "MainPageView.h"



- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    
    mainPageView = [[MainPageView alloc] initWithFrame:CGRectMake(0, 20, 320, 460)];
    mainPageView.backgroundColor = [UIColor lightGrayColor];
    [mainPageView initDrawViewData];
    self.view = mainPageView;

}