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UIPushBehavior 推动效果
typedef NS_ENUM(NSInteger, UIPushBehaviorMode) {
UIPushBehaviorModeContinuous, 持续的力
UIPushBehaviorModeInstantaneous 瞬间的力
} NS_ENUM_AVAILABLE_IOS(7_0);
@property (nonatomic, readonly) UIPushBehaviorMode mode; 推动效果的样式
@property (nonatomic, readwrite) BOOL active; 是否激活
@property (readwrite, nonatomic) CGFloat angle; 推动角度
// A continuous force vector with a magnitude of 1.0, applied to a 100 point x 100 point view whose density value is 1.0, results in view acceleration of 100 points per s^2
@property (readwrite, nonatomic) CGFloat magnitude; 推动力量
@property (readwrite, nonatomic) CGVector pushDirection; 推动的方向
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UISnapBehavior：迅速移动效果
// The point argument is expressed in the reference coordinate system
- (instancetype)initWithItem:(id <UIDynamicItem>)item snapToPoint:(CGPoint)point;
迅速移动效果 只能一次 添加到一个元素上 snapToPoint 让他移动到哪一个点
@property (nonatomic, assign) CGFloat damping; // damping value from 0.0 to 1.0. 0.0 is the least oscillation. damping 的范围是（0.0-1.0）
UIAttachmentBehavior 符着效果
typedef NS_ENUM(NSInteger, UIAttachmentBehaviorType) {
UIAttachmentBehaviorTypeItems, 吸附一个元素
UIAttachmentBehaviorTypeAnchor 吸附一个点
} NS_ENUM_AVAILABLE_IOS(7_0);
设置吸附效果的样式
@property (readonly, nonatomic) UIAttachmentBehaviorType attachedBehaviorType;
UIAttachmentBehavior：附着效果
吸附着一个视图 或者一个点 （也可以多个连接）
附着效果 一个视图与一个锚点或者另一个视图相连接的情况
附着行为描述的是两点之间的连接情况，可以模拟刚性或者弹性连接
在多个物体间设定多个UIAttachmentBehavior，可以模拟多物体连接
typedef NS_ENUM(NSInteger, UIAttachmentBehaviorType) {
UIAttachmentBehaviorTypeItems, 吸附一个元素
UIAttachmentBehaviorTypeAnchor 吸附一个点
} NS_ENUM_AVAILABLE_IOS(7_0);
设置吸附效果的样式
@property (readonly, nonatomic) UIAttachmentBehaviorType attachedBehaviorType;
@property (readwrite, nonatomic) CGPoint anchorPoint;锚点
@property (readwrite, nonatomic) CGFloat length;距离 与锚点的距离
@property (readwrite, nonatomic) CGFloat damping; // 1: critical damping 跳跃度
@property (readwrite, nonatomic) CGFloat frequency; // in Hertz 幅度
dynamicAnimator = [[UIDynamicAnimator alloc] initWithReferenceView:self.view];
view = [[UIView alloc] initWithFrame:CGRectMake(50, 50,50, 50)];
view.backgroundColor = [UIColor purpleColor];
[self.view addSubview:view];
view1 = [[UIView alloc] initWithFrame:CGRectMake(150, 150,50, 50)];
view1.backgroundColor = [UIColor colorWithRed:0.300 green:0.334 blue:0.768 alpha:1.000];
[self.view addSubview:view1];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];
[self.view addGestureRecognizer:tap];
tapAction:方法的实现
- (void)tapAction:(UITapGestureRecognizer *)sender{
#pragma mark 推动效果
/* [dynamicAnimator removeAllBehaviors];
// UIPushBehavior *push = [[UIPushBehavior alloc] initWithItems:@[view] mode:UIPushBehaviorModeContinuous];
//// x是正右 负左 y是正下 负上
// push.pushDirection = CGVectorMake(1, 0);
// push.magnitude = 5;
// push.active = YES;
// [dynamicAnimator addBehavior:push];
// ------------------------------------*/
#pragma mark 迅速移动效果
/* [dynamicAnimator removeAllBehaviors];
UISnapBehavior *snap = [[UISnapBehavior alloc] initWithItem:view snapToPoint:[sender locationInView:self.view]];
snap.damping = 0;///阻尼值从0.0到1.0。0.0是最低的振荡
[dynamicAnimator addBehavior:snap];
------------------------------------------*/
#pragma mark 吸符效果(吸符一个点)
[dynamicAnimator removeAllBehaviors];
UIAttachmentBehavior *attachment = [[UIAttachmentBehavior alloc] initWithItem:view offsetFromCenter:UIOffsetMake(20, 20) attachedToAnchor:[sender locationInView:self.view]];
attachment.length = 100;
attachment.damping = 0.5;
attachment.frequency = 50;
[dynamicAnimator addBehavior:attachment];
#pragma mark 吸符效果(吸符一个视图)
// UIAttachmentBehavior *attachment1 = [[UIAttachmentBehavior alloc] initWithItem:view offsetFromCenter:UIOffsetMake(10, 10) attachedToItem:view1 offsetFromCenter:UIOffsetMake(10, 10)];
// attachment1.length = 100;
// attachment1.damping = 0.5;
// attachment1.frequency = 50;
// [dynamicAnimator addBehavior:attachment1];
UIAttachmentBehavior *attachment2 = [[UIAttachmentBehavior alloc] initWithItem:view1 attachedToItem:view];
attachment2.damping = 0.5;
attachment2.frequency = 50;
[dynamicAnimator addBehavior:attachment2];
}
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原文地址：http://www.cnblogs.com/fshmjl/p/4852208.html
