iOS块动画使用

-块动画

• +(void)animateWithDuration:(NSTimeInterval)duration
  animations:(void (^)(void))animations
  completion:(void (^__nullable)(BOOL finished))completion;

• +(void)animateWithDuration:(NSTimeInterval)duration
  animations:(void (^)(void))animations;

• +(void)animateWithDuration:(NSTimeInterval)duration
  delay:(NSTimeInterval)delay
  usingSpringWithDamping:(CGFloat)dampingRatio
  initialSpringVelocity:(CGFloat)velocity
  options:(UIViewAnimationOptions)options
  animations:(void (^)(void))animations
  completion:(void (^__nullable)(BOOL finished))completion;

  • duration : 动画时间
  • delay : 延迟时间
  • dampingRatio : 阻尼系数(弹性) 越小越弹
  • velocity : 速率
  • options : 选项
  • animations : 做动画的代码块
  • completion : 动画完成的代码块 “回调”

// 做动画按钮点击事件- (IBAction)makeAnim:(id)sender {    // 1.    //    [UIView animateWithDuration:.2 animations:^{    //            self.orgView.frame = CGRectMake(0, 0, 200, 200);    //            self.orgView.backgroundColor = [UIColor blueColor];    //    }];    // 2.    //    [UIView animateWithDuration:3 animations:^{    //        self.orgView.frame = CGRectMake(0, 0, 200, 200);    //        self.orgView.backgroundColor = [UIColor blueColor];    //    } completion:^(BOOL finished) {    //        NSLog(@"动画完成");    //    }];    // 3.    /**     duration : 时间     delay : 延迟     damping : 阻尼效果     velocity : 速度     options : 选项     animations : "需要做动画的代码"     completion : "动画完成后执行的代码 回调"     */    [UIView animateWithDuration:.25 delay:0 usingSpringWithDamping:.8 initialSpringVelocity:.7 options:0 animations:^{        self.orgView.frame = CGRectMake(100, 100, 200, 200);        self.orgView.backgroundColor = [UIColor blueColor];    }        completion:^(BOOL finished) {            NSLog(@"动画完成");        }];}