CGRect screenBounds = [ [UIScreen mainScreen]bounds];//返回的是帶有狀態欄的Rect
    CGRect viewBounds = [ [UIScreen mainScreen]applicationFrame];//不包含狀態欄的Rect
    //screenBounds 與 viewBounds 均是相對于設備屏幕來說的
    NSLog(@"screenBounds.origin.x:%f",screenBounds.origin.x);
    NSLog(@"screenBounds.origin.y:%f",screenBounds.origin.y);
    NSLog(@"screenBounds.size.width:%f",screenBounds.size.width);
    NSLog(@"screenBounds.size.height:%f",screenBounds.size.height);
    NSLog(@"viewBounds.origin.x:%f",viewBounds.origin.x);
    NSLog(@"viewBounds.origin.y:%f",viewBounds.origin.y);
    NSLog(@"viewBounds.size.width:%f",viewBounds.size.width);
    NSLog(@"viewBounds.size.height:%f",viewBounds.size.height);

UIView* myView =[[ UIView alloc]initWithFrame:CGRectMake(0.0,0.0,200.0,400.0)];//這里創建了一塊畫布，定義了相對于父窗口的位置， 以及大小。 

self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];  
self.window.backgroundColor = [UIColor grayColor];//給window設置一個背景色  
[self.window makeKeyAndVisible];//讓window顯示出來  

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    CGRect bound = [[UIScreen mainScreen]bounds];
    NSLog(@"boundwith:%f    boundheight:%f",bound.size.width,bound.size.height);
    NSLog(@"boundx:%f    boundy:%f",bound.origin.x,bound.origin.y);
    CGRect appBound = [[UIScreen mainScreen]applicationFrame];
    NSLog(@"appBoundwith:%f    boundheight:%f",appBound.size.width,appBound.size.height);
    NSLog(@"appBoundx:%f    boundy:%f",appBound.origin.x,appBound.origin.y);    
    //畫第一塊畫布然涂成藍色，大小是320 X 100
    CGRect CGone = CGRectMake(0.0, 0.0, 320, 100);//畫個矩形，初始化位置與大小
    UIView *v_one = [[UIView alloc]initWithFrame:CGone];//初始化view
    v_one.backgroundColor = [UIColor blueColor];// 涂成藍色
    [self.window addSubview:v_one];//直接加到畫框上
    //第二塊注意它的位置
    CGRect CGtwo = CGRectMake(0.0, 100, 160, 100);//畫個矩形、初始化位置與大小
    UIView *v_two = [[UIView alloc]initWithFrame:CGtwo];//初始化view
    v_two.backgroundColor = [UIColor redColor];//涂成紅色
    [self.window addSubview:v_two];//疊加到畫框
    //第三塊注意他的位置
    CGRect CGthree = CGRectMake(160, 100, 160, 100);//
    UIView *v_three = [[UIView alloc]initWithFrame:CGthree];//
    v_three.backgroundColor = [UIColor greenColor];//
    [self.window addSubview:v_three];//
    //第四塊注意它的位置
    CGRect CGfour = CGRectMake(0.0, 260, 320, 200);//
    UIView *v_four = [[UIView alloc]initWithFrame:CGfour];//
    v_four.backgroundColor = [UIColor orangeColor];//
    [self.window addSubview:v_four];//
    //第五塊，計算一下它的位置，看看它的效果，
    //你可以讓試一下把這段代碼移到第一快初始化的上面試試，會有意想不到的效果
    CGRect CGfive = CGRectMake(100, 150, 160, 200);
    UIView *v_five = [[UIView alloc]initWithFrame:CGfive];
    v_five.backgroundColor = [UIColor yellowColor];
    [self.window addSubview:v_five];
    self.window.backgroundColor = [UIColor grayColor];//
    [self.window makeKeyAndVisible];//
    //最后記得release  
    v_one = nil;
    v_two = nil;
    v_three = nil;
    v_four = nil;
    v_five = nil;
    return YES;  
    //self.window.backgroundColor = [UIColor whiteColor];
    //[self.window makeKeyAndVisible];
    //return YES;
}

//取得StatusBar的位置和大小
[self.view addSubview:theToolbar];
 CGRect statusBarRect = [[UIApplication sharedApplication]statusBarFrame];
NSLog(@\"%@\", NSStringFromCGRect(statusBarRect));

//取得工作區域的位置和大小
CGRect workSpaceRect = [[UIScreen mainScreen]applicationFrame];
NSLog(@\"%@\", NSStringFromCGRect(workSpaceRect));

//取得整個畫面的位置和大小
CGRect windowRect = [[UIScreen mainScreen]bounds];
NSLog(@\"%@\", NSStringFromCGRect(windowRect));

 //將Subview從當前的UIView中移除
 [Subview removeFromSuperview];
 //替UIView增加一個Subview
 [UIView addSubview:Subview];

 //將Subview往前移動一個圖層（與它的前一個圖層對調位置）
 [UIView bringSubviewToFront:Subview];
 //將Subview往后移動一個圖層（與它的后一個圖層對調位置）
 [UIView sendSubviewToBack:Subview];

 //交換兩個圖層
 [UIView exchangeSubviewAtIndex:indexA withSubviewAtIndex:indexB];

 //取得Index
 NSInteger index = [[UIView subviews] indexOfObject:Subview名稱];

 //加上註記
 [Subview setTag:NSInteger];

 //取的UIView下的所有Subview
 [UIView subviews]