如何在iOS中列出uiviewcontroller中的所有子视图？

我想列出

UIViewController

中的所有子视图。我尝试了

self.view.subview

，但并没有列出所有的子视图，例如，

UITableViewCell

中的子视图没有找到。有什么想法吗？

UITableViewCell中的子视图未打印的原因是您必须在顶层输出所有子视图。单元的子视图不是视图的直接子视图

为了获取UITableViewCell的子视图，您需要在打印循环中确定哪些子视图属于UITableViewCell（使用

isKindOfClass:

），然后在其子视图中循环

---

编辑：此博客文章可能有助于

self.view.subview维护视图的继承权。要获取uitableviewcell的子视图，您必须执行以下操作

 for (UIView *subView in self.view.subviews) {
      if ([subView isKindOfClass:[UITableView class]]) {
            for (UIView *tableSubview in subView.subviews) {
                .......
            }
      }
 }

---

您必须递归地迭代子视图

- (void)listSubviewsOfView:(UIView *)view {
    
    // Get the subviews of the view
    NSArray *subviews = [view subviews];

    for (UIView *subview in subviews) {
        
        // Do what you want to do with the subview
        NSLog(@"%@", subview);

        // List the subviews of subview
        [self listSubviewsOfView:subview];
    }
}

---

您需要递归打印，此方法还可以根据视图的深度设置选项卡

-(void) printAllChildrenOfView:(UIView*) node depth:(int) d
{
    //Tabs are just for formatting
    NSString *tabs = @"";
    for (int i = 0; i < d; i++)
    {
        tabs = [tabs stringByAppendingFormat:@"\t"];
    }

    NSLog(@"%@%@", tabs, node);

    d++; //Increment the depth
    for (UIView *child in node.subviews)
    {
        [self printAllChildrenOfView:child depth:d];
    }

}

-（void）printAllChildrenOfView:（UIView*）节点深度：（int）d
{
//选项卡只是用于格式化
NSString*制表符=@；
对于（int i=0；i

您可以尝试一种奇特的数组技巧，如：

[self.view.subview makeObjectsPerformSelector:@selector（printAllChildrenOfView）]

只有一行代码。当然，您可能需要调整您的方法
printAllChildrenOfView
，以不接受任何参数或创建新方法。
内置的xcode/gdb转储视图层次结构的方法很有用——递归描述，根据

它会输出一个更完整的视图层次结构，您可能会发现它很有用：

> po [_myToolbar recursiveDescription]

<UIToolbarButton: 0xd866040; frame = (152 0; 15 44); opaque = NO; layer = <CALayer: 0xd864230>>
   | <UISwappableImageView: 0xd8660f0; frame = (0 0; 0 0); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0xd86a160>>

>po[\u myToolbar recursiveDescription]
| 
我参加聚会有点晚了，但有一个更普遍的解决方案：

@implementation UIView (childViews)

- (NSArray*) allSubviews {
    __block NSArray* allSubviews = [NSArray arrayWithObject:self];

    [self.subviews enumerateObjectsUsingBlock:^( UIView* view, NSUInteger idx, BOOL*stop) {
        allSubviews = [allSubviews arrayByAddingObjectsFromArray:[view allSubviews]];
                   }];
        return allSubviews;
    }

@end

我这样说：

NSLog(@"%@", [self.view subviews]);

let view = FooController.view
let subviews = view.subviewsList()

在UIViewController中。
我编写了一个类别，列出了一个视图控制器所持有的所有视图，其灵感来源于之前发布的答案

@interface UIView (ListSubviewHierarchy)
- (NSString *)listOfSubviews;
@end

@implementation UIView (ListSubviewHierarchy)
- (NSInteger)depth
{
    NSInteger depth = 0;
    if ([self superview]) {
        deepth = [[self superview] depth] + 1;
    }
    return depth;
}

- (NSString *)listOfSubviews
{
    NSString * indent = @"";
    NSInteger depth = [self depth];

    for (int counter = 0; counter < depth; counter ++) {
        indent = [indent stringByAppendingString:@"  "];
    }

    __block NSString * listOfSubviews = [NSString stringWithFormat:@"\n%@%@", indent, [self description];

    if ([self.subviews count] > 0) {
        [self.subviews enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
            UIView * subview = obj;
            listOfSubviews = [listOfSubviews stringByAppendingFormat:@"%@", [subview listOfSubviews]];
        }];
    }
    return listOfSubviews;
}
@end

界面UIView（ListSubviewHierarchy）
-（NSString*）子视图列表；
@结束
@实现UIView（ListSubviewHierarchy）
-（NSInteger）深度
{
NSInteger深度=0；
如果（[自超视图]）{
深度=[[self superview]深度]+1；
}
返回深度；
}
-（NSString*）子视图列表
{
NSString*缩进=@；
NSInteger深度=[自深度]；
用于（int计数器=0；计数器<深度；计数器++）{
缩进=[indent stringByAppendingString:@”“]；
}
__block NSString*listOfSubviews=[NSString stringWithFormat:@“\n%@%@”，缩进[自我描述]；
如果（[self.subviews count]>0）{
[self.subviews EnumerateObjectsSusingBlock:^（id obj，整数idx，布尔*停止）{
UIView*子视图=obj；
listOfSubviews=[listOfSubviews stringByAppendingFormat:@“%@，[subview listOfSubviews]]；
}];
}
返回子视图列表；
}
@结束

要列出视图控制器持有的所有视图，只需

NSLog（%@，[self-listOfSubviews]）

，它

self

表示视图控制器本身。尽管它不是很有效

---

另外，您可以使用

NSLog（@“\n%@，[（id）self.view performSelector:@selector（recursiveDescription）]；

来做同样的事情，我认为它比我的实现更有效。

这是swift版本

 func listSubviewsOfView(view:UIView){

    // Get the subviews of the view
    var subviews = view.subviews

    // Return if there are no subviews
    if subviews.count == 0 {
        return
    }

    for subview : AnyObject in subviews{

        // Do what you want to do with the subview
        println(subview)

        // List the subviews of subview
        listSubviewsOfView(subview as UIView)
    }
}

简单的Swift示例：

 var arrOfSub = self.view.subviews
 print("Number of Subviews: \(arrOfSub.count)")
 for item in arrOfSub {
    print(item)
 }

---

或者，如果要从UIView扩展返回所有子视图（和嵌套子视图）的数组，请执行以下操作：

func getAllSubviewsRecursively() -> [AnyObject] {
    var allSubviews: [AnyObject] = []

    for subview in self.subviews {
        if let subview = subview as? UIView {
            allSubviews.append(subview)
            allSubviews = allSubviews + subview.getAllSubviewsRecursively()
        }
    }

    return allSubviews
}

---

Swift 2.0兼容版

NSArray *views = [viewController.view recurrenceAllSubviews];

let views = viewController.view.recurrenceAllSubviews()

此处提供了一种递归方法，用于获取泛型视图的所有子视图：

extension UIView {
  func subviewsList() -> [UIView] {
      var subviews = self.subviews
      if subviews.count == 0 {
          return subviews + []
      }
      for v in subviews {
         subviews += v.listSubviewsOfView()
      }
      return subviews
  }
}

所以你可以用这种方式到处打电话：

NSLog(@"%@", [self.view subviews]);

let view = FooController.view
let subviews = view.subviewsList()

最短解

for subview in self.view.subviews {
    print(subview.dynamicType)
}

结果

UIView
UIView
UISlider
UISwitch
UITextField
_UILayoutGuide
_UILayoutGuide

注释

• 如您所见，此方法不会递归列出子视图。请参阅其他一些答案

---

Swift中优雅的递归解决方案：

extension UIView {

    func subviewsRecursive() -> [UIView] {
        return subviews + subviews.flatMap { $0.subviewsRecursive() }
    }

}

您可以在任何UIView上调用subviewsRecursive（）：

let allSubviews = self.view.subviewsRecursive()

C#Xamarin版本：

void ListSubviewsOfView(UIView view)
{
    var subviews = view.Subviews;
    if (subviews.Length == 0) return;

    foreach (var subView in subviews)
    {
        Console.WriteLine("Subview of type {0}", subView.GetType());
        ListSubviewsOfView(subView);
    }
}

或者，如果要查找我使用的特定类型的所有子视图，请执行以下操作：

List<T> FindViews<T>(UIView view)
{
    List<T> allSubviews = new List<T>();
    var subviews = view.Subviews.Where(x =>  x.GetType() == typeof(T)).ToList();

    if (subviews.Count == 0) return allSubviews;

       foreach (var subView in subviews)
       {
            allSubviews.AddRange(FindViews<T>(subView));
        }

    return allSubviews;

}

列出FindView（UIView）
{
List allSubviews=新列表（）；
var subviews=view.subviews.Where（x=>x.GetType（）==typeof（T））.ToList（）；
如果（subviews.Count==0）返回所有子视图；
foreach（子视图中的var子视图）
{
AddRange（FindViews（subView））；
}
返回所有子视图；
}

我已经在

UIView的一个类别中完成了这项工作，只需调用传递索引的函数，以漂亮的树格式打印它们。这只是作者发布的答案的另一个选项

#pragma标记-视图树
-（无效）打印子视图街道索引：（NSInteger）索引
{
如果（！self）
{
返回；
}
NSString*tabSpace=@；
@自动释放池
{
对于（NSInteger x=0；x

我希望它能有所帮助：）
在我看来，UIView的分类或扩展比其他分类或扩展要好得多
递归是获取所有子视图的关键

let viewSequence = sequence(state: [viewController.view]) { (state: inout [UIView] ) -> [UIView]? in
    guard state.count > 0 else { return nil }
    defer {
        state = state.map{ $0.subviews }.flatMap{ $0 }
    }
    return state
}
let views = viewSequence.flatMap{ $0 }

了解更多信息：



目标-C
Swift 3.1
示例

NSArray *views = [viewController.view recurrenceAllSubviews];

let views = viewController.view.recurrenceAllSubviews()

直接使用序列函数获取所有子视图

let viewSequence = sequence(state: [viewController.view]) { (state: inout [UIView] ) -> [UIView]? in
    guard state.count > 0 else { return nil }
    defer {
        state = state.map{ $0.subviews }.flatMap{ $0 }
    }
    return state
}
let views = viewSequence.flatMap{ $0 }

细节

代码9.0.1，Swift 4
代码10.2（10E125），Swift 5

解决方案
用法
结果
这是对答案的改写：

您必须首先获取指向th的指针/引用
Optional<UIView>
  ▿ some : <FacebookApp.WhatsNewView: 0x7f91747c71f0; frame = (30 50; 354 636); clipsToBounds = YES; layer = <CALayer: 0x6100002370e0>>

po [0x7f91747c71f0 recursiveDescription]

<FacebookApp.WhatsNewView: 0x7f91747c71f0; frame = (30 50; 354 636); clipsToBounds = YES; layer = <CALayer: 0x6100002370e0>>
   | <UIStackView: 0x7f91747c75f0; frame = (45 60; 264 93); layer = <CATransformLayer: 0x610000230ec0>>
   |    | <UIImageView: 0x7f916ef38c30; frame = (10.6667 0; 243 58); opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x61000003b840>>
   |    | <UIStackView: 0x7f91747c8230; frame = (44.6667 58; 174.667 35); layer = <CATransformLayer: 0x6100006278c0>>
   |    |    | <FacebookApp.CopyableUILabel: 0x7f91747a80b0; baseClass = UILabel; frame = (44 0; 86.6667 16); text = 'What's New'; gestureRecognizers = <NSArray: 0x610000c4a770>; layer = <_UILabelLayer: 0x610000085550>>
   |    |    | <FacebookApp.CopyableUILabel: 0x7f916ef396a0; baseClass = UILabel; frame = (0 21; 174.667 14); text = 'Version 14.0.5c Oct 05, 2...'; gestureRecognizers = <NSArray: 0x610000c498a0>; layer = <_UILabelLayer: 0x610000087300>>
   | <UITextView: 0x7f917015ce00; frame = (45 183; 264 403); text = '   •   new Adding new feature...'; clipsToBounds = YES; gestureRecognizers = <NSArray: 0x6100000538f0>; layer = <CALayer: 0x61000042f000>; contentOffset: {0, 0}; contentSize: {264, 890}>
   |    | <<_UITextContainerView: 0x7f9170a13350; frame = (0 0; 264 890); layer = <_UITextTiledLayer: 0x6080002c0930>> minSize = {0, 0}, maxSize = {1.7976931348623157e+308, 1.7976931348623157e+308}, textContainer = <NSTextContainer: 0x610000117b20 size = (264.000000,340282346638528859811704183484516925440.000000); widthTracksTextView = YES; heightTracksTextView = NO>; exclusionPaths = 0x61000001bc30; lineBreakMode = 0>
   |    |    | <_UITileLayer: 0x60800023f8a0> (layer)
   |    |    | <_UITileLayer: 0x60800023f3c0> (layer)
   |    |    | <_UITileLayer: 0x60800023f360> (layer)
   |    |    | <_UITileLayer: 0x60800023eca0> (layer)
   |    | <UIImageView: 0x7f9170a7d370; frame = (-39 397.667; 36 2.33333); alpha = 0; opaque = NO; autoresize = TM; userInteractionEnabled = NO; layer = <CALayer: 0x60800023f4c0>>
   |    | <UIImageView: 0x7f9170a7d560; frame = (258.667 -39; 2.33333 36); alpha = 0; opaque = NO; autoresize = LM; userInteractionEnabled = NO; layer = <CALayer: 0x60800023f5e0>>
   | <UIView: 0x7f916ef149c0; frame = (0 587; 354 0); layer = <CALayer: 0x6100006392a0>>
   | <UIButton: 0x7f91747a8730; frame = (0 0; 0 0); clipsToBounds = YES; opaque = NO; layer = <CALayer: 0x610000639320>>
   |    | <UIButtonLabel: 0x7f916ef00a80; frame = (0 -5.66667; 0 16); text = 'See More Details'; opaque = NO; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x610000084d80>>

extension UIView {
  var allSubviews: [UIView] {
    return self.subviews.reduce([UIView]()) { $0 + [$1] + $1.allSubviews }
  }
}

- (NSString *)recusiveDescription:(UIView *)view
{
    NSString *s = @"";
    NSArray *subviews = [view subviews];
    if ([subviews count] == 0) return @"no subviews";

    for (UIView *subView in subviews) {
         s = [NSString stringWithFormat:@"<%@; frame = (%f %f : %f %f) \n ",NSStringFromClass([subView class]), subView.frame.origin.x, subView.frame.origin.y ,subView.frame.size.width, subView.frame.size.height];  
        [self recusiveDescription:subView];
    }
    return s;
}