只有加上 [self.view layoutIfNeeded];这一句才会有动画
[UIView animateWithDuration:0.25 animations:^{
[self.pinView mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(@(172 * kAppUIScaH));
}];
[self.view layoutIfNeeded];
} completion:^(BOOL finished) {
}];
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