UIKit 框架之UIView二

//
//  MyView.m
//  UIView
//
//  Created by cyw on 15-5-17.
//  Copyright (c) 2015年 cyw. All rights reserved.
//

#import "MyView.h"

@implementation MyView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
    }
    return self;
}
//下面两个方法主要作用是事件传递、响应者链
//当在一个view上添加一个屏蔽罩，但又不影响对下面view的操作，也就是可以透过屏蔽罩对下面的view进行操作
-(UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    UIView *hitView = [super hitTest:point withEvent:event];
    if (hitView == self)
    {
        return nil;
    }
    else
    {
        return hitView;
    }
}
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
    return NO;
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    //    UITouch *touch=[touches anyObject];
    NSLog(@"bbbbb");
    return;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    // Drawing code
}
*/

@end

//
//  ViewController.m
//  UIView
//
//  Created by cyw on 15-5-17.
//  Copyright (c) 2015年 cyw. All rights reserved.
//

#import "ViewController.h"
#import "MyView.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
	UIView *view1=[[UIView alloc]init];
    view1.frame=CGRectMake(100, 100, 200, 200);
    //允许用户交互
    view1.userInteractionEnabled=YES;
     //tag值
    view1.tag=10001;
    //layer
    view1.layer.backgroundColor=[UIColor redColor].CGColor;
    
    //UIViewGeometry
    //bounds    center
    NSLog(@"bounds=%@\ncenter=%@",NSStringFromCGRect(view1.bounds),NSStringFromCGPoint( view1.center));
    //设置view是否响应多点触摸，默认为NO
    view1.multipleTouchEnabled=YES;
    ////设置touch是否排它，默认为NO
    view1.exclusiveTouch=YES;
    //是否隐藏
    view1.hidden=NO;
    
    //将像素point从view中转换到当前视图中，返回在当前视图中的像素值
    CGPoint point=[view1 convertPoint:CGPointMake(200, 200) fromView:self.view];
    NSLog(@"convertPoint fromView=%@",NSStringFromCGPoint(point));
    
    // 将像素point由point所在视图转换到目标视图view中，返回在目标视图view中的像素值
    CGPoint point1=[view1 convertPoint:CGPointMake(200, 200) toView:self.view];
     NSLog(@"convertPoint toView=%@",NSStringFromCGPoint(point1));
    
    
  
    // 将rect从view中转换到当前视图中，返回在当前视图中的rect
    CGRect rect=CGRectMake(50, 50, 200, 200);
    CGRect rect1= [view1 convertRect:rect fromView:self.view];
    //将rect由rect所在视图转换到目标视图view中，返回在目标视图view中的rect
    CGRect rect2=[view1 convertRect:rect toView:self.view];
    NSLog(@"convertRect fromView=%@",NSStringFromCGRect(rect1));
    NSLog(@"convertRect toView=%@",NSStringFromCGRect(rect2));
    //子视图自适应  如果设置成NO，那么subView的autoresizingMask属性失效。
    view1.autoresizesSubviews=YES;
    
//    typedef NS_OPTIONS(NSUInteger, UIViewAutoresizing) {
//        UIViewAutoresizingNone                   = 0,   不调整
//        UIViewAutoresizingFlexibleLeftMargin   = 1 << 0,自动调整与superView左边的距离，也就是说，与superView右边的距离不变。
//        UIViewAutoresizingFlexibleWidth        = 1 << 1,自动调整与superView的右边距离，也就是说，与superView左边的距离不变。
//        UIViewAutoresizingFlexibleRightMargin  = 1 << 2,
//        UIViewAutoresizingFlexibleTopMargin    = 1 << 3,
//        UIViewAutoresizingFlexibleHeight       = 1 << 4,
//        UIViewAutoresizingFlexibleBottomMargin = 1 << 5
//    };
    //多个用|
    view1.autoresizingMask=UIViewAutoresizingFlexibleLeftMargin;
    
    //调整view的尺寸去适应其内容
    [view1 sizeToFit];
    //传递view的尺寸，返回建议的子view尺寸
    CGSize size=[view1 sizeThatFits:CGSizeMake(100, 150)];
    NSLog(@"sizeThatFits=%@",NSStringFromCGSize(size));
    
    //UIViewHierarchy
    
    //UIViewRendering
    //子视图超出边境裁剪
    view1.clipsToBounds=YES;
    //透明度
    view1.alpha=0.5;
//    opaque属性提示绘制系统如何处理view。如果opaque设置为YES，绘图系统会将
//    view看为完全不透明，这样绘图系统就可以优化一些绘制操作以提升性能。如果设置
//    为NO，那么绘图系统结合其它内容来处理view。默认情况下，这个属性是YES。)
//    如果屏幕是静止的，那么这个opaque属性的设置与否不是一个大问题。但是，如果
//    view是嵌入到scroll view中的，或者是复杂动画的一部分，不将设置这个属性的话
//    肯定会影响程序的性能!
    
    
//    alpha支持animation, hidden和opaque不支持
//    hidden开销小,alpha=0透明开销大,如果效果一样,用hidden好一点.
//    hideen的时候view是不接收事件的,但alpha为0接收
//    当把View设置为透明的背景时,一般把opaque设置为NO,可以减少开销,对内存也好.
//    告诉系统渲染器view是否不透明，设置YES可以加快渲染，默认为YES，如果设置了alpha值，应该设置为NO
    view1.opaque=YES;
//    是否清除缓冲区中不可见内容，默认为YES，如果在一个滚动操作频繁的视图中，应该设为NO，以避免重新渲染，提升性能
    view1.clearsContextBeforeDrawing=YES;
    //view自适应变化的方式 填充方式 左对齐、右对齐、拉伸填充等
    view1.contentMode=UIViewContentModeScaleToFill;
    
    MyView *myView=[[MyView alloc]initWithFrame:view1.frame];
    myView.backgroundColor=[UIColor blackColor];
    
    [self.view addSubview:view1];
    //将自定义的MyView 放在View上面时,点击触发响应者链
    [self.view addSubview:myView];    
}
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
//    UITouch *touch=[touches anyObject];
    NSLog(@"aaaaa");
    return;
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

2015-05-17 18:20:17.356 UIView[676:60b] bounds={{0, 0}, {200, 200}}
center={200, 200}
2015-05-17 18:20:17.358 UIView[676:60b] convertPoint fromView={100, 100}
2015-05-17 18:20:17.358 UIView[676:60b] convertPoint toView={300, 300}
2015-05-17 18:20:17.359 UIView[676:60b] convertRect fromView={{-50, -50}, {200, 200}}
2015-05-17 18:20:17.360 UIView[676:60b] convertRect toView={{150, 150}, {200, 200}}
2015-05-17 18:20:17.360 UIView[676:60b] sizeThatFits={200, 200}
2015-05-17 18:20:20.049 UIView[676:60b] aaaaa