[self.containerView.subviews enumerateObjectsUsingBlock:^(__kindof UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) { [obj removeFromSuperview]; }]; [self.containerView remakeConstraints:^(MASConstraintMaker *make) { make.left.equalTo(15); make.top.equalTo(66); make.right.equalTo(-15); }];

[LAnqxpp]

这一步操作意思是 ？？？