使用递归: - (void)listSubviewsOfView:(UIView *)view { // Get the subviews of the view NSArray *subviews = [view subviews]; // Return if there are no subviews if ([subviews count] == 0) return; // COUNT CHECK LINE for (UIView *subview in subviews) { // Do…
题目: You are given a binary tree with unique integer values on each node. However, the child pointers on each node may point to any other node in the tree including itself, introducing cycles into the binary tree. A cycle is defined when you can trave…
假设在一个页面上有众多内容,而我们只想把该页面上的表格内容打印出来,window.print()方法会把整个页面的内容打印出来,如何做到只打印表格内容呢? 既然window.print()只会打印整页的内容,何不把表格放在一个部分视图中,在部分视图中再调用window.print()方法. Model很简单: public class Student { public int Id { get; set; } public string Name { get; set; } public dec…
iOS10 UI教程视图和子视图的可见性 iOS10 UI教程视图和子视图的可见性,一个父视图可以通过clipsToBounds属性,定义子视图在边界(边界就是父视图的框架也就是父视图可以显示的范围)以外部分的可见性.其语法形式如下: var clipsToBounds: Bool { get set } 其中,将此属性设置为true,视图将掩盖它的子视图,防止这些子视图被显示在边界之外,如图1.17所示. 图1.17 可见性 [示例1-8:clipsToBounds]以下将使用clips…
目录:[Swift]Xcode实际操作 本文将实现视图的添加与删除,以及切换视图在父视图中的层次. import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. //创建一个原点在(30,50),尺寸为(20…
iOS提供了方法来完成上述值得转换 convertRect:toView:, convertRect:FromView: convertPoint:toView: and convertPoint:fromView: methods 这里以convertRect:FromView:为例,文档中对该方法的描述: Converts a point from the coordinate system of a given view to that of the receiver. 将一个指定view…
