Question

如何在视图控制器中获取所有UITextField的数组？

编辑：我不想将文本字段硬编码为数组。我实际上想要从该委托的调用者的所有字段的委托中获取列表。

Answer 1

搜索所有子视图的子视图的递归实现:(这样你就可以捕获uiscrollview中嵌入的文本字段等）

-(NSArray*)findAllTextFieldsInView:(UIView*)view{
    NSMutableArray* textfieldarray = [[[NSMutableArray alloc] init] autorelease];
    for(id x in [view subviews]){
        if([x isKindOfClass:[UITextField class]])
            [textfieldarray addObject:x];

        if([x respondsToSelector:@selector(subviews)]){
            // if it has subviews, loop through those, too
            [textfieldarray addObjectsFromArray:[self findAllTextFieldsInView:x]];
        }
    }
    return textfieldarray;
}

-(void)myMethod{
   NSArray* allTextFields = [self findAllTextFieldsInView:[self view]];
   // ...
 }

Answer 2

如果您知道需要包含所有NSArray的{{1}}，那么为什么不将它们添加到数组中呢？

UITextField

如果您使用的是笔尖，请使用NSMutableArray *textFields = [[NSMutableArray alloc] init]; UITextField *textField = [[UITextField alloc] initWithFrame:myFrame]; [textFields addObject:textField]; // <- repeat for each UITextField

IBOutletCollection

然后将所有@property (nonatomic, retain) IBOutletCollection(UITextField) NSArray *textFields;连接到该数组

Answer 3

- 使用以下代码获取包含View上所有UITextField文本值的数组：

   NSMutableArray *addressArray=[[NSMutableArray alloc] init];

   for(id aSubView in [self.view subviews])
   {
           if([aSubView isKindOfClass:[UITextField class]])
           {
                  UITextField *textField=(UITextField*)aSubView;
                  [addressArray addObject:textField.text];
           }
   }
   NSLog(@"%@", addressArray);

Answer 4

extension UIView 
{
   class func getAllSubviewsOfType<T: UIView>(view: UIView) -> [T] 
   {
       return view.subviews.flatMap { subView -> [T] in
       var result = UIView.getAllSubviewsOfType(view: subView) as [T]
       if let view = subView as? T {
           result.append(view)
       }
       return result
     }
   }

   func getAllSubviewsWithType<T: UIView>() -> [T] {
       return UIView.getAllSubviewsOfType(view: self.view) as [T]
   }
}

如何与文本字段一起使用：

let textFields = self.view.getAllSubviewsWithType() as [UITextField]

Answer 5

您可以遍历控制器视图的子视图。

以下是粗略示例：

NSMutableArray *arrOfTextFields = [NSMutableArray array];
for (id subView in self.view.subviews)
{
    if ([subView isKindOfClass:[UITextField class]])
       [arrOfTextFields addObject:subView]; 
}

Answer 6

编辑没有全局变量的递归（仅适用于Tim）

-(NSArray*)performUIElementSearchForClass:(Class)targetClass onView:(UIView*)root{

    NSMutableArray *searchCollection = [[[NSMutableArray alloc] init] autorelease];

    for(UIView *subview in root.subviews){

        if ([subView isKindOfClass:targetClass])  
            [searchCollection addObject:subview];

        if(subview.subviews.count > 0)
            [searchCollection addObjectsFromArray:[self performUIElementSearchForClass:targetClass onView:subview]];

    }

    return searchCollection;
}

获取所有UITextField的数组

6 个答案: