如何在iOS中的其他视图后面添加视图

Question

我想在iOS中的标签栏模拟下添加一个视图,然后用它后面的动画显示它.但是当我使用我的代码时,必须来自我的标签栏后面的视图会重叠我的标签栏一段时间.

这是我的代码:

- (void)handlePressedButton {
if (pressedButton.selected) {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    CGAffineTransform transform1 = CGAffineTransformMakeTranslation(-196.0, 0.0);
    CGAffineTransform transform2 = CGAffineTransformMakeTranslation(0.0, 0.0);
    [leftPanelView setTransform:transform1];
    [movedView setTransform:transform2];
    [UIView commitAnimations];
    pressedButton.selected = NO;
}
else {
    pressedButton.selected = YES;
    if (leftPanelView) {
        [leftPanelView removeFromSuperview];
        leftPanelView = nil;
    }
    CGRect viewFrame = CGRectMake(-196, 0, 236, 748);
    leftPanelView = [[UIView alloc] initWithFrame:viewFrame];
    leftPanelView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"left-nav-content.png"]];

    // Code to populate leftPanelView according to what button is pressed.
    [self populateLeftPanelView];

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    [self.view addSubview:leftPanelView];
    CGAffineTransform transform1 = CGAffineTransformMakeTranslation(236.0, 0.0);
    CGAffineTransform transform2 = CGAffineTransformMakeTranslation(112.0, 0.0);
    [leftPanelView setTransform:transform1];
    [movedView setTransform:transform2];
    [UIView commitAnimations];
}

}

这里的leftPanelView是必须位于标签栏下的视图.移动视图是另一个视图,位于左侧面板的右侧(不要介意)

Answer 1

此外addSubview,您可以依赖其他方法来添加视图:

– insertSubview:aboveSubview:
– insertSubview:belowSubview:
– insertSubview:atIndex:

您可以使用这些方法控制视图的索引(实际上是z-index或图层顺序).

Answer 2

尝试sendSubviewToBack

[self.view sendSubviewToBack:leftPanelView];

Answer 3

迅速

在视图层次结构中的另一个视图下方插入视图:

view.insertSubview(subview1, belowSubview: subview2)

在视图层次结构中的另一个视图上方插入视图:

view.insertSubview(subview1, aboveSubview: subview2)

在指定的索引处插入子视图:

view.insertSubview(subview, at: index)

移动指定的子视图,使其显示在其兄弟节点后面:

subview1.sendSubviewToBack(subview2)

移动指定的子视图,使其显示在其兄弟节点之上:

subview1.bringSubviewToFront(subview2)

在指定的索引处交换子视图:

view.exchangeSubview(at: index1, withSubviewAt: index2)

Answer 4

哦,我自己找到了解决方案.我在此之后添加了:

[UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    [self.view addSubview:leftPanelView];

这一行:

[self.view sendSubviewToBack:leftPanelView];

Answer 5

在Swift 5中

self.view.sendSubviewToBack(leftPanelView)