效果圖
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實(shí)現(xiàn)代碼文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-736859.html
- (void)setUpContraints
{
CGFloat topImageCentery = (SCREEN_HEIGHT - 370 * PLUS_SCALE) / 2;
[self.topIconView mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerX.mas_equalTo(0);
make.centerY.equalTo(self.view.mas_top).with.offset(topImageCentery);
}];
[self.view layoutIfNeeded];
}
- (void)topAnimation
{
CASpringAnimation *springAnimation = [CASpringAnimation animationWithKeyPath:@"transform.scale"];
springAnimation.mass = 1.5;
springAnimation.stiffness = 400;
springAnimation.damping = 20;
springAnimation.initialVelocity = 0;
springAnimation.duration = 1;
springAnimation.fromValue = @0;
springAnimation.toValue = @1;
springAnimation.fillMode = kCAFillModeBoth;
springAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[self.topIconView.layer addAnimation:springAnimation forKey:nil];
}
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