前面看了卖报的小画家Sure的一篇文章仿新版ofo共享单车小黄人动态效果感觉挺好玩的所以也改写了一个，中途感谢若只如初见_f1af前辈的帮助
先来感受一下👇
小黄人大眼萌.PNG
导入头文件
#import <CoreMotion/CoreMotion.h>
添加小黄人眼珠子
- (void) initEyes{
//左眼
EyesImage * leftEye = [[EyesImage alloc] initWithFrame:CGRectMake(CURRENT_SIZE(150), CURRENT_SIZE(300), CURRENT_SIZE(20), CURRENT_SIZE(20))];
leftEye.image = [UIImage imageNamed:@"minions_eyes"];
leftEye.layer.masksToBounds = YES;
leftEye.layer.cornerRadius = 10;
leftEye.contentMode = UIViewContentModeScaleAspectFit;
leftEye.collisionBoundsType = UIDynamicItemCollisionBoundsTypeEllipse;
[self.view addSubview:leftEye];
self.leftEye = leftEye;
//右眼
EyesImage * rightEye = [[EyesImage alloc] initWithFrame:CGRectMake(CURRENT_SIZE(210), CURRENT_SIZE(300), CURRENT_SIZE(20), CURRENT_SIZE(20))];
rightEye.image = [UIImage imageNamed:@"minions_eyes"];
rightEye.layer.masksToBounds = YES;
rightEye.layer.cornerRadius = 10;
rightEye.contentMode = UIViewContentModeScaleAspectFit;
rightEye.collisionBoundsType = UIDynamicItemCollisionBoundsTypeEllipse;
[self.view addSubview:rightEye];
self.rightEye = rightEye;
}
初始化仿真器
- (UIDynamicAnimator *)animator
{
if (!_animator) {
// 创建一个物理仿真器
_animator = [[UIDynamicAnimator alloc] initWithReferenceView:self.view];
}
return _animator;
}
设置动画和眼珠子活动范围
- (void)SetCoreMotion{
// 设置重力并纪录
UIGravityBehavior *gravity = [[UIGravityBehavior alloc] init];
gravity.magnitude = 1;
[gravity addItem:self.leftEye];
[gravity addItem:self.rightEye];
[self.animator addBehavior:gravity];
self.gravity = gravity;
//设置摩擦力
UICollisionBehavior *collision = [[UICollisionBehavior alloc] init];
[collision addItem:self.leftEye];
[collision addItem:self.rightEye];
UIDynamicItemBehavior *item = [[UIDynamicItemBehavior alloc] initWithItems:@[self.leftEye, self.rightEye]];
//摩擦力
item.friction = 100;
[self.animator addBehavior:item];
// 3.开始仿真
[self.animator addBehavior:gravity];
[self.animator addBehavior:collision];
// 画出边界
UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:
CGRectMake(CURRENT_SIZE(128),CURRENT_SIZE(280), CURRENT_SIZE(50), CURRENT_SIZE(45))];
[collision addBoundaryWithIdentifier:@"circle" forPath:path];
UIBezierPath *path2 = [UIBezierPath bezierPathWithOvalInRect:
CGRectMake(CURRENT_SIZE(186),CURRENT_SIZE(280), CURRENT_SIZE(50), CURRENT_SIZE(45))];
[collision addBoundaryWithIdentifier:@"circle" forPath:path2];
}
开始动画
- (void)SetAccelerometer{
CMMotionManager *motionManager = [[CMMotionManager alloc]init];
motionManager.accelerometerUpdateInterval = 0.01; // 告诉manager，更新频率是100Hz
[motionManager startAccelerometerUpdatesToQueue:[NSOperationQueue currentQueue] withHandler:^(CMAccelerometerData * _Nullable accelerometerData, NSError * _Nullable error) {
CMAccelerometerData *newestAccel = motionManager.accelerometerData;
double accelerationX = newestAccel.acceleration.x;
double accelerationY = newestAccel.acceleration.y;
self.gravity.gravityDirection = CGVectorMake(accelerationX, -accelerationY);
}];
}
完成效果
小黄人大眼萌.gif
代码我已经上传到了GitHub，如果有感兴趣的朋友可以到GitHub中下载--小黄人大眼萌，喜欢的记得给个Stare✨，欢迎大家提出建议，谢谢
我是Renjiee 我要做最骚的程序猿👨💻
