您好我正在尝试将集合视图中的项目添加到同一屏幕上的 uiview。当用户点击一个单元格时，我找到并把它放到下面的 mycreationview 中（我还希望用户在这些添加的 uiimages 周围移动）。而且我在顶部有一个工具栏可以返回等。现在，当我点击单元格 3 次时，添加了 3 个图像以进行查看，但随后工具栏消失并且其上的后退按钮隐藏到顶部/左侧，只有四分之一可见，怎么能我调试这个？
myCollectionViewCell* cell=(myCollectionViewCell* ) [self.myCollectionView cellForItemAtIndexPath:index];
UIImageView *iv = [[UIImageView alloc]initWithImage:cell.myCellImageView.image];
iv.contentMode = UIViewContentModeScaleAspectFill;
NSLayoutConstraint * constraint1 = [NSLayoutConstraint constraintWithItem:iv attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:self.myCreationView attribute:NSLayoutAttributeWidth multiplier:0.4f constant:0];
NSLayoutConstraint * constraint2 = [NSLayoutConstraint constraintWithItem:iv attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:self.myCreationView attribute:NSLayoutAttributeHeight multiplier:0.4f constant:0];
NSLayoutConstraint * constraint3 = [NSLayoutConstraint constraintWithItem:iv attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.myCreationView attribute:NSLayoutAttributeLeft multiplier:0 constant:10];
NSLayoutConstraint * constraint4 = [NSLayoutConstraint constraintWithItem:iv attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.myCreationView attribute:NSLayoutAttributeTop multiplier:0 constant:10];
[iv setTranslatesAutoresizingMaskIntoConstraints:NO];
iv.autoresizesSubviews=YES;
iv.userInteractionEnabled=YES;
[self.myCreationView addSubview:iv];
[self.myCreationView addConstraint:constraint1];
[self.myCreationView addConstraint:constraint2];
[self.myCreationView addConstraint:constraint3];
[self.myCreationView addConstraint:constraint4];