iOS开发拓展篇—UIDynamic(重力行为+碰撞检测)

  1 //
  2 //  YYViewController.m
  3 //  12-重力行为和碰撞行为
  4 //
  5 //  Created by apple on 14-8-6.
  6 //  Copyright (c) 2014年 yangyong. All rights reserved.
  7 //
  8 
  9 #import "YYViewController.h"
 10 
 11 @interface YYViewController ()
 12 @property (weak, nonatomic) IBOutlet UIView *redView;
 13 
 14 @property (weak, nonatomic) IBOutlet UIProgressView *block1;
 15 @property (weak, nonatomic) IBOutlet UISegmentedControl *block2;
 16 
 17 @property(nonatomic,strong)UIDynamicAnimator *animator;
 18 @end
 19 
 20 @implementation YYViewController
 21 -(UIDynamicAnimator *)animator
 22 {
 23     if (_animator==nil) {
 24         //创建物理仿真器（ReferenceView:参照视图，设置仿真范围）
 25         self.animator=[[UIDynamicAnimator alloc]initWithReferenceView:self.view];
 26     }
 27     return _animator;
 28 }
 29 - (void)viewDidLoad
 30 {
 31     [super viewDidLoad];
 32     
 33     //设置红色view的角度
 34     self.redView.transform=CGAffineTransformMakeRotation(M_PI_4);
 35 }
 36 
 37 -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
 38 {
 39     //1.重力行为
 40 //    [self testGravity];
 41     //2.重力行为+碰撞检测
 42 //    [self testGravityAndCollsion];
 43     //3.测试重力的一些属性
 44     [self testGravityAndCollsion2];
 45     //用2根线作为边界
 46 //    [self testGravityAndCollision3];
 47     //4.用圆作为边界
 48 //    [self testGravityAndCollision4];
 49 }
 50 
 51 /**
 52  *  重力行为
 53  */
 54 -(void)testGravity
 55 {
 56     //1.创建仿真行为（进行怎样的仿真效果？）
 57     //重力行为
 58     UIGravityBehavior *gravity=[[UIGravityBehavior alloc]init];
 59     //2.添加物理仿真元素
 60     [gravity addItem:self.redView];
 61     //3.执行仿真，让物理仿真元素执行仿真行为
 62     [self.animator addBehavior:gravity];
 63 }
 64 /**
 65  *  重力行为+碰撞检测
 66  */
 67 -(void)testGravityAndCollsion
 68 {
 69     //1.重力行为
 70     UIGravityBehavior *gravity=[[UIGravityBehavior alloc]init];
 71     [gravity addItem:self.redView];
 72     
 73     //2碰撞检测行为
 74     UICollisionBehavior *collision=[[UICollisionBehavior alloc]init];
 75     [collision addItem:self.redView];
 76     [collision addItem:self.block1];
 77     [collision addItem:self.block2];
 78     
 79     //让参照视图的边框成为碰撞检测的边界
 80     collision.translatesReferenceBoundsIntoBoundary=YES;
 81     
 82     //3.执行仿真
 83     [self.animator addBehavior:gravity];
 84     [self.animator addBehavior:collision];
 85 }
 86 
 87 /**
 88  *  测试重力行为的属性
 89  */
 90 -(void)testGravityAndCollsion2
 91 {
 92     //1.重力行为
 93     UIGravityBehavior *gravity=[[UIGravityBehavior alloc]init];
 94     //（1）设置重力的方向（是一个角度）
 95 //    gravity.angle=(M_PI_2-M_PI_4);
 96     //（2）设置重力的加速度,重力的加速度越大，碰撞就越厉害
 97     gravity.magnitude=100;
 98     //（3）设置重力的方向（是一个二维向量）
 99     gravity.gravityDirection=CGVectorMake(0, 1);
100     [gravity addItem:self.redView];
101     
102     //2碰撞检测行为
103     UICollisionBehavior *collision=[[UICollisionBehavior alloc]init];
104     [collision addItem:self.redView];
105     [collision addItem:self.block1];
106     [collision addItem:self.block2];
107     
108     //让参照视图的边框成为碰撞检测的边界
109     collision.translatesReferenceBoundsIntoBoundary=YES;
110     
111     //3.执行仿真
112     [self.animator addBehavior:gravity];
113     [self.animator addBehavior:collision];
114     
115 }
116 
117 /**
118  *  用圆作为边界
119  */
120 - (void)testGravityAndCollision4
121 {
122     // 1.重力行为
123     UIGravityBehavior *gravity = [[UIGravityBehavior alloc] init];
124     [gravity addItem:self.redView];
125     
126     // 2.碰撞检测行为
127     UICollisionBehavior *collision = [[UICollisionBehavior alloc] init];
128     [collision addItem:self.redView];
129     
130     // 添加一个椭圆为碰撞边界
131     UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 0, 320, 320)];
132     [collision addBoundaryWithIdentifier:@"circle" forPath:path];
133     
134     // 3.开始仿真
135     [self.animator addBehavior:gravity];
136     [self.animator addBehavior:collision];
137 }
138 
139 /**
140  *  用2根线作为边界
141  */
142 - (void)testGravityAndCollision3
143 {
144     // 1.重力行为
145     UIGravityBehavior *gravity = [[UIGravityBehavior alloc] init];
146     [gravity addItem:self.redView];
147     
148     // 2.碰撞检测行为
149     UICollisionBehavior *collision = [[UICollisionBehavior alloc] init];
150     [collision addItem:self.redView];
151     CGPoint startP = CGPointMake(0, 160);
152     CGPoint endP = CGPointMake(320, 400);
153     [collision addBoundaryWithIdentifier:@"line1" fromPoint:startP toPoint:endP];
154     CGPoint startP1 = CGPointMake(320, 0);
155     [collision addBoundaryWithIdentifier:@"line2" fromPoint:startP1 toPoint:endP];
156 //    collision.translatesReferenceBoundsIntoBoundary = YES;
157     
158     // 3.开始仿真
159     [self.animator addBehavior:gravity];
160     [self.animator addBehavior:collision];
161 }
162 @end

1     //（3）设置重力的方向（是一个二维向量）
2     gravity.gravityDirection=CGVectorMake(-1, 1);

1  UICollisionBehavior *collision = [[UICollisionBehavior alloc] init];
2     [collision addItem:self.redView];
3     CGPoint startP = CGPointMake(0, 160);
4     CGPoint endP = CGPointMake(320, 400);
5     [collision addBoundaryWithIdentifier:@"line1" fromPoint:startP toPoint:endP];
6     CGPoint startP1 = CGPointMake(320, 0);
7     [collision addBoundaryWithIdentifier:@"line2" fromPoint:startP1 toPoint:endP];