[摘要]本文是對ios視圖frame和bounds的對比的講解，對學習IOS蘋果軟件開發有所幫助,與大家分享。

bounds坐標：自己定義的坐標系統，setbound指明了本視圖左上角在該坐標系統中的坐標，

　　　　　　 默認值（0，0）

frame坐標： 子視圖左上角在父視圖坐標系統（bounds坐標系統）中的坐標，默認值（0，0）

子視圖實際位置＝父視圖實際位置－父視圖bounds坐標＋子視圖frame坐標

一、bounds

　　只影響“子視圖”相對屏幕的位置，修改時不會影響自身相對屏幕的位置

　　1、父視圖bounds坐標為（0，0）時

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(self.view.frame),NSStringFromCGRect(self.view.bounds));
    
    UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(20, 20, 200, 260)];
    view1.backgroundColor = [UIColor redColor];
    [self.view addSubview:view1];
    
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(self.view.frame),NSStringFromCGRect(self.view.bounds));
}

　　

　　2、父視圖bounds坐標為（－20，－20）時　

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(self.view.frame),NSStringFromCGRect(self.view.bounds));
    
    UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(20, 20, 200, 260)];
    view1.backgroundColor = [UIColor redColor];
    [self.view addSubview:view1];
    [self.view setBounds:CGRectMake(-20, -20, 320, 568)];
    
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(self.view.frame),NSStringFromCGRect(self.view.bounds));
｝

　　

二、frame

　　修改時改變了自己的在父視圖坐標系統（bounds坐標系統）的位置，自身位置和

　　子視圖位置都會被改變。

　　1、父視圖frame坐標（0，0）

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 200, 260)];
    view1.backgroundColor = [UIColor redColor];
    [self.view addSubview:view1];
    
    UIView *view2 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    view2.backgroundColor = [UIColor yellowColor];
    [view1 addSubview:view2];
    
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(view1.frame),NSStringFromCGRect(view1.bounds));
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(view2.frame),NSStringFromCGRect(view2.bounds));
｝

　　

　　2、父視圖frame坐標（60，60）

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(60, 60, 200, 260)];
    view1.backgroundColor = [UIColor redColor];
    [self.view addSubview:view1];
    
    UIView *view2 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    view2.backgroundColor = [UIColor yellowColor];
    [view1 addSubview:view2];
    
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(view1.frame),NSStringFromCGRect(view1.bounds));
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(view2.frame),NSStringFromCGRect(view2.bounds));
｝

　　

三、說明

　　根視圖只能修改bounds坐標，而不可以修改frame坐標

　　以下self.view為根視圖

　　1、初始狀態

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(20, 20, 200, 260)];
    view1.backgroundColor = [UIColor redColor];
    [self.view addSubview:view1];
｝

　　

　　2、修改bounds坐標：有效

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(20, 20, 200, 260)];
    view1.backgroundColor = [UIColor redColor];
    [self.view addSubview:view1];
    CGRect viewBounds = self.view.bounds;
    viewBounds.origin.y=-40;
    viewBounds.origin.x=-40;
    self.view.bounds=viewBounds;
    
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(self.view.frame),NSStringFromCGRect(self.view.bounds));
｝

　　　

　　　

　　3、修改frame坐標：無效

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIView *view1 = [[UIView alloc] initWithFrame:CGRectMake(20, 20, 200, 260)];
    view1.backgroundColor = [UIColor redColor];
    [self.view addSubview:view1];
    CGRect viewFrame = self.view.frame;
    viewFrame.origin.y=60;
    viewFrame.origin.x=60;
    self.view.frame=viewFrame;
    
    NSLog(@"view frame:%@========view bounds:%@",NSStringFromCGRect(self.view.frame),NSStringFromCGRect(self.view.bounds));
｝