UI笔记

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

//创建视图控件。

@property(strong,nonatomic)UIView *myview;

@end

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

// 初始化视图

self.myview=[[UIView alloc]initWithFrame:(CGRectMake(100, 100, 100, 200))];

// 2背景色

self.myview.backgroundColor=[UIColor redColor];

// 3.添加子视图到view上.

[self.view addSubview:self.myview];

// 4.初始化view的颜色。

self.view.backgroundColor=[UIColor purpleColor];

// 5.输出view的尺寸

// SStringFromCGRect((CGRect rect))将结构体转换成字符串。

CGRect rectview= self.view.frame;

NSLog(@"%@",NSStringFromCGRect(rectview));

// 相对父视图的坐标位置

NSLog(@"myView.frame:%@",NSStringFromCGRect(self.myview.frame));

// bounds 只是显示当前视图的大小 和位置无关

NSLog(@"myView.bounds:%@",NSStringFromCGRect(self.myview.bounds));

// center 控件相对于父视图的中心点坐标.

NSLog(@"myView.center:%@",NSStringFromCGPoint(self.myview.center));

//重新设置视图的中心点

self.myview.center=CGPointMake(300, 500);

//改变视图的边界。用bounds。

self.myview.bounds=CGRectMake(0, 0, 100, 150);

// 水平方向移动100

self.myview.transform=CGAffineTransformMakeTranslation(-100, 0);

// 垂直方向

self.myview.transform=CGAffineTransformMakeRotation(M_PI_4);

self.myview.transform = CGAffineTransformRotate(self.myview.transform, M_PI_2);

//

// 还原

@property(strong,nonatomic) UIView *aview;

@property(strong,nonatomic) UIView *bview;

@property(strong,nonatomic) UIView *cview;

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

self.aview=[[UIView alloc]initWithFrame:CGRectMake(100, 100, 200, 200)];

self.aview.backgroundColor=[UIColor redColor];

self.bview=[[UIView alloc]initWithFrame:CGRectMake(150, 150, 200, 200)];

self.bview.backgroundColor=[UIColor blackColor];

self.cview=[[UIView alloc]initWithFrame:CGRectMake(200, 200, 200, 200)];

self.cview.backgroundColor=[UIColor blueColor];

[self.view addSubview:self.aview];

// [self.view insertSubview:self.bview aboveSubview:self.aview];

[self.view addSubview:self.bview];

[self.view addSubview:self.cview];

// yichu

// [self.bview removeFromSuperview];

// 交换位置

// [self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:3];

// 将子视图放到最后

// [self.view sendSubviewToBack:self.cview];

// 将子视图放到最前

[self.view bringSubviewToFront:self.aview];