01-UIDynamic简单演练demo源代码

1. 源代码下载:
01-简单演练.zip
72.0 KB
//
// ViewController.m
// 01.简单演练
//
// Created by apple on 13-12-24.
//技术博客http://www.cnblogs.com/ChenYilong/新浪微博http://weibo.com/luohanchenyilong
#import "ViewController.h"
@interface ViewController ()
{
UIDynamicAnimator *_animator;
}
@end
@implementation ViewController
/*
要使用UIDynamic的步骤
1. 实例化一个仿真者，用于物理仿真
参照视图：用于指定仿真的范围
Box2D，World（仿真世界），10m
2. 指定要仿真（模拟）的行为（动作），并指定哪些对象遵守该动作
3. 将行为添加到仿真者，仿真立刻开始
*/
- (void)viewDidLoad
{
[super viewDidLoad];
UIView *view = [[UIView alloc]initWithFrame:CGRectMake(110, 100, 100, 100)];
view.backgroundColor = [UIColor blueColor];
[self.view addSubview:view];
// [view.layer setTransform:CATransform3DRotate(view.layer.transform, M_PI_4, 0, 0, 1)];
view.transform = CGAffineTransformMakeRotation(M_PI_4);
UIView *redView = [[UIView alloc] initWithFrame:CGRectMake(80, 50, 50, 50)];
redView.backgroundColor = [UIColor redColor];
[self.view addSubview:redView];
// 1. 谁来仿真？UIDynamicAnimator来负责仿真
UIDynamicAnimator *animator = [[UIDynamicAnimator alloc] initWithReferenceView:self.view];
// 2. 仿真个什么动作？*落体
UIGravityBehavior *gravity = [[UIGravityBehavior alloc] initWithItems:@[view, redView]];
// 3. 碰撞检测
UICollisionBehavior *collision = [[UICollisionBehavior alloc] initWithItems:@[view, redView]];
// 设置不要出边界，碰到边界会被反弹
collision.translatesReferenceBoundsIntoBoundary = YES;
// 4. 开始仿真
[animator addBehavior:gravity];
[animator addBehavior:collision];
//本文永久链接,转载请注明出处:http://www.cnblogs.com/ChenYilong/p/3490312.html
// 5. 使负责仿真的UIDynamicAnimator对象时刻存在于整个事件中—>创建成员变量记录之.否则出了viewDidLoad就会被销毁.否则出了viewDidLoad就会被销毁,而仿真是个长时间持续存在的事件.
_animator = animator;
}
@end

01-UIDynamic简单演练demo源代码

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