标签：des style blog color strong os
bounds坐标：自己定义的坐标系统，setbound指明了本视图左上角在该坐标系统中的坐标，
默认值（0，0）
frame坐标： 子视图左上角在父视图坐标系统（bounds坐标系统）中的坐标，默认值（0，0）
子视图实际位置＝父视图实际位置－父视图bounds坐标＋子视图frame坐标
一、bounds
只影响“子视图”相对屏幕的位置，修改时不会影响自身相对屏幕的位置
1、父视图bounds坐标为（0，0）时
- (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、父视图bounds坐标为（－20，－20）时
- (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
修改时改变了自己的在父视图坐标系统（bounds坐标系统）的位置，自身位置和
子视图位置都会被改变。
1、父视图frame坐标（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、父视图frame坐标（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、说明
根视图只能修改bounds坐标，而不可以修改frame坐标
以下self.view为根视图
1、初始状态
- (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坐标：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坐标：无效
- (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)); ｝
ios视图frame和bounds的对比,布布扣,bubuko.com
标签：des style blog color strong os
原文地址：http://www.cnblogs.com/edisonfeng/p/3817034.html
