【代码笔记】旋转的图片

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

#import "AppDelegate.h"
#import "RootViewController.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.

RootViewController *rootVC=[[RootViewController alloc]init];
UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:rootVC];
self.window.rootViewController=nav;

self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}

#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"

@interface RootViewController ()

@end

@implementation RootViewController
@synthesize mainPageView;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}

- (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;

}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}