iOS power effects, the most important point of the attribute retention (the reason for writing a power effect but no effect is here)

@property (nonatomic, strong) uidynamicitembehavior *square1propertiesbehavior;

@property (nonatomic, strong) uidynamicitembehavior *square2propertiesbehavior;

@property (nonatomic, strong) uidynamicanimator *animator;

@property(nonatomic,strong)uidynamicanimator*dy;

@end

@implementation Viewcontroller

-(void) viewdidload {

[Super viewdidload];

UIView * Apple = [[UIView alloc] initwithframe:cgrectmake( (+/- )];

Apple. backgroundcolor = [uicolor redcolor];

[self. View addsubview: Apple];

uidynamicanimator *animator = [[uidynamicanimator alloc] Initwithreferenceview :self. View];

uigravitybehavior *gravitybeahvior = [[uigravitybehavior alloc] initwithitems:@ [Apple]];

uicollisionbehavior *collisionbehavior = [[uicollisionbehavior alloc] Initwithitems:@[Apple]];

uidynamicitembehavior*behavior = [[uidynamicitembehavior alloc] initwithitems: @[Apple]];

//behavior.elasticity =;

Collisionbehavior. translatesreferenceboundsintoboundary = YES;

[Animator Addbehavior: Gravitybeahvior];

[Animator Addbehavior: Collisionbehavior];

[Animator Addbehavior: behavior];

self. Dy = animator;//attribute hold to animate

}

-(void) didreceivememorywarning {

[Super didreceivememorywarning];

//Dispose of any resources, can be recreated.

}

iOS power effects, the most important point of the attribute retention (the reason for writing a power effect but no effect is here)