为什么 UIButton 在模拟器中这么大?
Why the UIButton is so big in a simulator?
我下面有一个 UIPageViewController 和一个 UIButton。这是我的故事板的屏幕截图。
当我构建应用程序时,按钮很大:
我的所有约束都是自动设置的。我试图指定高度,但没有帮助。有什么想法吗?
P.S。我正在使用 XCode 6.3.
编辑:
ViewController.swift:
import UIKit
class ViewController: UIViewController, UIPageViewControllerDataSource {
@IBOutlet weak var restartButton: UIButton!
var pageViewController: UIPageViewController!
var pageTitles: NSArray!
var pageImages: NSArray!
override func viewDidLoad() {
super.viewDidLoad()
self.pageTitles = NSArray(objects: "Page 1", "Page 2")
self.pageImages = NSArray(objects: "algorithm", "apoint")
self.pageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("PageViewController") as! UIPageViewController
self.pageViewController.dataSource = self
var startVC = self.viewControllerAtIndex(0) as ContentViewController
var viewControllers = NSArray(object: startVC)
self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)
self.pageViewController.view.frame = CGRectMake(0, 0, self.view.frame.width, self.view.frame.size.height - restartButton.frame.height)
self.addChildViewController(self.pageViewController)
self.view.addSubview(self.pageViewController.view)
self.pageViewController.didMoveToParentViewController(self)
self.view.sendSubviewToBack(self.pageViewController.view)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func viewControllerAtIndex(index: Int) -> ContentViewController {
if ((self.pageTitles.count == 0) || (index >= self.pageTitles.count)) {
return ContentViewController()
}
var vc: ContentViewController = self.storyboard?.instantiateViewControllerWithIdentifier("ContentViewController") as! ContentViewController
vc.imageFile = self.pageImages[index] as! String
vc.titleText = self.pageTitles[index] as! String
vc.pageIndex = index
return vc
}
@IBAction func restartAction(sender: AnyObject) {
var startVC = self.viewControllerAtIndex(0) as ContentViewController
var viewControllers = NSArray(object: startVC)
self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)
}
func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {
var vc = viewController as! ContentViewController
var index = vc.pageIndex as Int
if (index == 0) || (index == NSNotFound) {
return nil
}
index--
return self.viewControllerAtIndex(index)
}
func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
var vc = viewController as! ContentViewController
var index = vc.pageIndex as Int
if index == NSNotFound {
return nil
}
index++
if index == self.pageTitles.count {
return nil
}
return self.viewControllerAtIndex(index)
}
func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
return self.pageTitles.count
}
func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
return 0
}
}
您需要像这样在您的控制器场景中找到您的按钮,突出显示您的约束并删除它们。
就个人而言,当我遇到约束问题时,我会从头开始,全面删除所有约束。这只是我个人的做法。
接下来我要做的是从情节提要视图顶部的项目开始,并像这样设置其约束:
注意我的添加约束 window 我只选择 top 和 left 边距和 宽度和高度。我对我的每个对象都这样做,从屏幕顶部开始一直到底部。
显然,您需要稍微尝试一下此功能才能获得所需的结果。请注意,我提供的只是一个示例,并非万能的。
编辑:
阅读您的评论后,我不确定此解决方案是否对您有帮助,我没有意识到您是通过编程方式制作按钮的。我打算暂时搁置它。
我猜问题出在从按钮的顶部到界面中的其他地方有一个约束。摆脱这种约束。屏幕底部的按钮唯一需要的约束是它的底部和它的右或左或中心 - 它的宽度和高度是自动的。
我下面有一个 UIPageViewController 和一个 UIButton。这是我的故事板的屏幕截图。
当我构建应用程序时,按钮很大:
我的所有约束都是自动设置的。我试图指定高度,但没有帮助。有什么想法吗?
P.S。我正在使用 XCode 6.3.
编辑:
ViewController.swift:
import UIKit
class ViewController: UIViewController, UIPageViewControllerDataSource {
@IBOutlet weak var restartButton: UIButton!
var pageViewController: UIPageViewController!
var pageTitles: NSArray!
var pageImages: NSArray!
override func viewDidLoad() {
super.viewDidLoad()
self.pageTitles = NSArray(objects: "Page 1", "Page 2")
self.pageImages = NSArray(objects: "algorithm", "apoint")
self.pageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("PageViewController") as! UIPageViewController
self.pageViewController.dataSource = self
var startVC = self.viewControllerAtIndex(0) as ContentViewController
var viewControllers = NSArray(object: startVC)
self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)
self.pageViewController.view.frame = CGRectMake(0, 0, self.view.frame.width, self.view.frame.size.height - restartButton.frame.height)
self.addChildViewController(self.pageViewController)
self.view.addSubview(self.pageViewController.view)
self.pageViewController.didMoveToParentViewController(self)
self.view.sendSubviewToBack(self.pageViewController.view)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func viewControllerAtIndex(index: Int) -> ContentViewController {
if ((self.pageTitles.count == 0) || (index >= self.pageTitles.count)) {
return ContentViewController()
}
var vc: ContentViewController = self.storyboard?.instantiateViewControllerWithIdentifier("ContentViewController") as! ContentViewController
vc.imageFile = self.pageImages[index] as! String
vc.titleText = self.pageTitles[index] as! String
vc.pageIndex = index
return vc
}
@IBAction func restartAction(sender: AnyObject) {
var startVC = self.viewControllerAtIndex(0) as ContentViewController
var viewControllers = NSArray(object: startVC)
self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)
}
func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {
var vc = viewController as! ContentViewController
var index = vc.pageIndex as Int
if (index == 0) || (index == NSNotFound) {
return nil
}
index--
return self.viewControllerAtIndex(index)
}
func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
var vc = viewController as! ContentViewController
var index = vc.pageIndex as Int
if index == NSNotFound {
return nil
}
index++
if index == self.pageTitles.count {
return nil
}
return self.viewControllerAtIndex(index)
}
func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
return self.pageTitles.count
}
func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
return 0
}
}
您需要像这样在您的控制器场景中找到您的按钮,突出显示您的约束并删除它们。
就个人而言,当我遇到约束问题时,我会从头开始,全面删除所有约束。这只是我个人的做法。
接下来我要做的是从情节提要视图顶部的项目开始,并像这样设置其约束:
注意我的添加约束 window 我只选择 top 和 left 边距和 宽度和高度。我对我的每个对象都这样做,从屏幕顶部开始一直到底部。
显然,您需要稍微尝试一下此功能才能获得所需的结果。请注意,我提供的只是一个示例,并非万能的。
编辑:
阅读您的评论后,我不确定此解决方案是否对您有帮助,我没有意识到您是通过编程方式制作按钮的。我打算暂时搁置它。
我猜问题出在从按钮的顶部到界面中的其他地方有一个约束。摆脱这种约束。屏幕底部的按钮唯一需要的约束是它的底部和它的右或左或中心 - 它的宽度和高度是自动的。