#import <UIKit/UIKit.h>

@interface NCAppDelegate : UIResponder <UIApplicationDelegate> {
    UIWindow *window;
	UITabBarController *tabBarController;
}

@property (nonatomic, retain) UIWindow *window;
@property (nonatomic, retain) UITabBarController *tabBarController;

@end

@synthesize window;
@synthesize tabBarController;

- (void)dealloc
{
    [window release];
    [tabBarController release];
    [super dealloc];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    
    tabBarController = [[UITabBarController alloc] init];
    
    HomeViewController *vc1 = [[HomeViewController alloc] init];
    MetionsViewController *vc2 = [[MetionsViewController alloc] init];
    FavoritesViewController *vc3 = [[FavoritesViewController alloc] init];
    ProfileViewController *vc4 = [[ProfileViewController alloc] init];
    
    NSArray* controllers = [NSArray arrayWithObjects:vc1, vc2,vc3,vc4, nil];
    
    tabBarController.viewControllers = controllers;
    
    [window addSubview:tabBarController.view];
    [self.window makeKeyAndVisible];
    return YES;
}

@implementation HomeViewController

- (id)init {
    if (self = [super init]) {
        self.title = @"主页";
        UIImage* anImage = [UIImage imageNamed:@"home_default.png"];
        UITabBarItem* theItem = [[UITabBarItem alloc] initWithTitle:@"主页" image:anImage tag:0];
        self.tabBarItem = theItem;
        [theItem release];
    }
    return self;
}

使用for循环递归累加其内部的子控件的高度：

private ScrollView scrollView;
scrollView = (ScrollView) findViewById(R.id.scrollview);
int h = 0;
for (int i = 0; i < scrollView.getChildCount(); i++) {
h += scrollView.getChildAt(i).getHeight();}
Bitmap bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
					Bitmap.Config.ARGB_8888);
			// Bitmap bitmap = scrollView.getDrawingCache(true);
			final Canvas c = new Canvas(bitmap);
		
			scrollView.draw(c);

			ByteArrayOutputStream stream = new ByteArrayOutputStream();
			bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
			final byte[] picture = stream.toByteArray();
if (bitmap != null && !bitmap.isRecycled()) {
bitmap = null;// 把原来的 bitmap.recycle().改成这个
			}

代码如上即可给Scrollview进行截屏并转换为bitmap,和byte[]数组，你可以根据自己需要选择使用·········

Mac 的开机时，按住一些按键可以发生奇妙的事情，有些按键我们使用的比较多，比如“Option”键，但有些按键我们使用的次数比较少，容易遗忘。