约束动画,关键代码 [self.view layoutIfNee
2017-01-16 本文已影响28人
落寒z
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) {
}];