{{ message }}
uiview
Directory actions
More options
Directory actions
More options
uiview
Folders and files
<!DOCTYPE HTML>
<html lang="en-US" >
<head>
<meta charset="UTF-8">
<title>UIView | Mou</title>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<meta name="description" content="">
<meta name="generator" content="GitBook 1.0.3">
<meta name="HandheldFriendly" content="true"/>
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<link rel="apple-touch-icon-precomposed" sizes="152x152" href="../gitbook/images/apple-touch-icon-precomposed-152.png">
<link rel="shortcut icon" href="../gitbook/images/favicon.ico" type="image/x-icon">
<link rel="next" href="../jiugongge/README.html" />
<link rel="prev" href="../base/README.html" />
</head>
<body>
<link rel="stylesheet" href="../gitbook/style.css">
<div class="book" data-level="2" data-basepath=".." data-revision="1462863912916">
<div class="book-summary">
<div class="book-search">
<input type="text" placeholder="Type to search" class="form-control" />
</div>
<ul class="summary">
<li class="chapter " data-level="0" data-path="index.html">
<a href="../index.html">
<i class="fa fa-check"></i>
Markdown语法
</a>
</li>
<li class="chapter " data-level="1" data-path="base/README.html">
<a href="../base/README.html">
<i class="fa fa-check"></i>
<b>1.</b>
base
</a>
</li>
<li class="chapter active" data-level="2" data-path="uiview/README.html">
<a href="../uiview/README.html">
<i class="fa fa-check"></i>
<b>2.</b>
UIView
</a>
</li>
<li class="chapter " data-level="3" data-path="jiugongge/README.html">
<a href="../jiugongge/README.html">
<i class="fa fa-check"></i>
<b>3.</b>
jiugongge
</a>
</li>
<li class="chapter " data-level="4" data-path="uiscrollview/README.html">
<a href="../uiscrollview/README.html">
<i class="fa fa-check"></i>
<b>4.</b>
UIScrollView
</a>
</li>
<li class="chapter " data-level="5" data-path="uitableview/README.html">
<a href="../uitableview/README.html">
<i class="fa fa-check"></i>
<b>5.</b>
UITableView
</a>
</li>
<li class="chapter " data-level="6" data-path="autolayout/README.html">
<a href="../autolayout/README.html">
<i class="fa fa-check"></i>
<b>6.</b>
autolayout
</a>
</li>
<li class="chapter " data-level="7" data-path="map/README.html">
<a href="../map/README.html">
<i class="fa fa-check"></i>
<b>7.</b>
map
</a>
</li>
<li class="chapter " data-level="8" data-path="notification/README.html">
<a href="../notification/README.html">
<i class="fa fa-check"></i>
<b>8.</b>
notification
</a>
</li>
<li class="chapter " data-level="9" data-path="nstimer/README.html">
<a href="../nstimer/README.html">
<i class="fa fa-check"></i>
<b>9.</b>
nstimer
</a>
</li>
<li class="chapter " data-level="10" data-path="oc/README.html">
<a href="../oc/README.html">
<i class="fa fa-check"></i>
<b>10.</b>
OC
</a>
</li>
<li class="chapter " data-level="11" data-path="rac/README.html">
<a href="../rac/README.html">
<i class="fa fa-check"></i>
<b>11.</b>
rac
</a>
</li>
<li class="chapter " data-level="12" data-path="review1/README.html">
<a href="../review1/README.html">
<i class="fa fa-check"></i>
<b>12.</b>
review1
</a>
</li>
<li class="chapter " data-level="13" data-path="review2/README.html">
<a href="../review2/README.html">
<i class="fa fa-check"></i>
<b>13.</b>
review2
</a>
</li>
<li class="chapter " data-level="14" data-path="audio/README.html">
<a href="../audio/README.html">
<i class="fa fa-check"></i>
<b>14.</b>
audio
</a>
</li>
<li class="chapter " data-level="15" data-path="twocode/README.html">
<a href="../twocode/README.html">
<i class="fa fa-check"></i>
<b>15.</b>
twocode
</a>
</li>
<li class="chapter " data-level="16" data-path="memory/README.html">
<a href="../memory/README.html">
<i class="fa fa-check"></i>
<b>16.</b>
memory
</a>
</li>
<li class="chapter " data-level="17" data-path="bluetooth/README.html">
<a href="../bluetooth/README.html">
<i class="fa fa-check"></i>
<b>17.</b>
bluetooth
</a>
</li>
<li class="chapter " data-level="18" data-path="touchid/README.html">
<a href="../touchid/README.html">
<i class="fa fa-check"></i>
<b>18.</b>
touchid
</a>
</li>
<li class="chapter " data-level="19" data-path="uiviewcontroller/README.html">
<a href="../uiviewcontroller/README.html">
<i class="fa fa-check"></i>
<b>19.</b>
UIViewController
</a>
</li>
<li class="chapter " data-level="20" data-path="delegate_kvo/README.html">
<a href="../delegate_kvo/README.html">
<i class="fa fa-check"></i>
<b>20.</b>
delegate kvo
</a>
</li>
<li class="chapter " data-level="21" data-path="datasave/README.html">
<a href="../datasave/README.html">
<i class="fa fa-check"></i>
<b>21.</b>
dataSave
</a>
</li>
<li class="chapter " data-level="22" data-path="pickerview/README.html">
<a href="../pickerview/README.html">
<i class="fa fa-check"></i>
<b>22.</b>
pickerView
</a>
</li>
<li class="chapter " data-level="23" data-path="quartz2d/README.html">
<a href="../quartz2d/README.html">
<i class="fa fa-check"></i>
<b>23.</b>
quartz2D
</a>
</li>
<li class="chapter " data-level="24" data-path="uitextfield/README.html">
<a href="../uitextfield/README.html">
<i class="fa fa-check"></i>
<b>24.</b>
UITextField
</a>
</li>
<li class="chapter " data-level="25" data-path="uidynamic/README.html">
<a href="../uidynamic/README.html">
<i class="fa fa-check"></i>
<b>25.</b>
UIDynamic
</a>
</li>
<li class="chapter " data-level="26" data-path="coreanimation/README.html">
<a href="../coreanimation/README.html">
<i class="fa fa-check"></i>
<b>26.</b>
coreAnimation
</a>
</li>
<li class="chapter " data-level="27" data-path="cocoapods/README.html">
<a href="../cocoapods/README.html">
<i class="fa fa-check"></i>
<b>27.</b>
Cocoapods
</a>
</li>
<li class="chapter " data-level="28" data-path="thread/README.html">
<a href="../thread/README.html">
<i class="fa fa-check"></i>
<b>28.</b>
Thread
</a>
</li>
<li class="chapter " data-level="29" data-path="network/README.html">
<a href="../network/README.html">
<i class="fa fa-check"></i>
<b>29.</b>
network
</a>
</li>
<li class="divider"></li>
<li>
<a href="http://www.gitbook.io/" target="blank" class="gitbook-link">Published using GitBook</a>
</li>
</ul>
</div>
<div class="book-body">
<div class="body-inner">
<div class="book-header">
<!-- Actions Left -->
<a href="#" class="btn pull-left toggle-summary" aria-label="Toggle summary"><i class="fa fa-align-justify"></i></a>
<a href="#" class="btn pull-left toggle-search" aria-label="Toggle search"><i class="fa fa-search"></i></a>
<div id="font-settings-wrapper" class="dropdown pull-left">
<a href="#" class="btn toggle-dropdown" aria-label="Toggle font settings"><i class="fa fa-font"></i>
</a>
<div class="dropdown-menu font-settings">
<div class="dropdown-caret">
<span class="caret-outer"></span>
<span class="caret-inner"></span>
</div>
<div class="buttons">
<button type="button" id="reduce-font-size" class="button size-2">A</button>
<button type="button" id="enlarge-font-size" class="button size-2">A</button>
</div>
<div class="buttons font-family-list">
<button type="button" data-font="0" class="button">Serif</button>
<button type="button" data-font="1" class="button">Sans</button>
</div>
<div class="buttons color-theme-list">
<button type="button" id="color-theme-preview-0" class="button size-3" data-theme="0">White</button>
<button type="button" id="color-theme-preview-1" class="button size-3" data-theme="1">Sepia</button>
<button type="button" id="color-theme-preview-2" class="button size-3" data-theme="2">Night</button>
</div>
</div>
</div>
<!-- Actions Right -->
<div class="dropdown pull-right">
<a href="#" class="btn toggle-dropdown" aria-label="Toggle share dropdown"><i class="fa fa-share-alt"></i>
</a>
<div class="dropdown-menu font-settings dropdown-left">
<div class="dropdown-caret">
<span class="caret-outer"></span>
<span class="caret-inner"></span>
</div>
<div class="buttons">
<button type="button" data-sharing="twitter" class="button">Twitter</button>
<button type="button" data-sharing="google-plus" class="button">Google</button>
<button type="button" data-sharing="facebook" class="button">Facebook</button>
<button type="button" data-sharing="weibo" class="button">Weibo</button>
<button type="button" data-sharing="instapaper" class="button">Instapaper</button>
</div>
</div>
</div>
<a href="#" target="_blank" class="btn pull-right google-plus-sharing-link sharing-link" data-sharing="google-plus" aria-label="Share on Google Plus"><i class="fa fa-google-plus"></i></a>
<a href="#" target="_blank" class="btn pull-right facebook-sharing-link sharing-link" data-sharing="facebook" aria-label="Share on Facebook"><i class="fa fa-facebook"></i></a>
<a href="#" target="_blank" class="btn pull-right twitter-sharing-link sharing-link" data-sharing="twitter" aria-label="Share on Twitter"><i class="fa fa-twitter"></i></a>
<!-- Title -->
<h1>
<i class="fa fa-circle-o-notch fa-spin"></i>
<a href="../" >Mou</a>
</h1>
</div>
<div class="page-wrapper" tabindex="-1">
<div class="page-inner">
<section class="normal" id="section-gitbook_36">
<h1 id="uiview">UIView</h1>
<p>广告条的高度固定50</p>
<h1 id="uiview">UIView常见属性</h1>
<ul>
<li>NSArray *subviews<ul>
<li>所有的子控件</li>
<li>数组元素的顺序决定着子控件的显示层级顺序</li>
</ul>
</li>
</ul>
<h1 id="uiview">UIView的常见方法</h1>
<ul>
<li>addSubview<ul>
<li>添加一个子控件</li>
<li>使用这个方法添加的子控件会被塞到subviews数组的最后面</li>
</ul>
</li>
<li><p>layoutSubviews;
当一个控件的frame发生改变的时候就会自动调用
一般在这里布局内部的子控件(设置子控件的frame)
一定要调用super的layoutSubviews方法</p>
</li>
<li><p>didMoveToSuperview;
当一个控件被添加到父控件中就会调用</p>
</li>
<li><p>willMoveToSuperview:(UIView *)newSuperview;
当一个控件即将被添加到父控件中会调用</p>
</li>
<li><p>可使用下面的方法调整子控件在subview数组中的顺序</p>
<pre><code class="lang-objc"><span class="hljs-comment">//将子控件view插入到subviews数组的index位置</span>
- (<span class="hljs-keyword">void</span>)insertSubview:(<span class="hljs-built_in">UIView</span> *)view atIndex:(<span class="hljs-built_in">NSInteger</span>)index;
<span class="hljs-comment">//将子控件view显示到子控件siblingSubview的下面</span>
- (<span class="hljs-keyword">void</span>)insertSubview:(<span class="hljs-built_in">UIView</span> *)view belowSubview:(<span class="hljs-built_in">UIView</span> *)siblingSubview;
<span class="hljs-comment">//将子控件view显示到子控件siblingSubview的上面</span>
- (<span class="hljs-keyword">void</span>)insertSubview:(<span class="hljs-built_in">UIView</span> *)view aboveSubview:(<span class="hljs-built_in">UIView</span> *)siblingSubview;
<span class="hljs-comment">//将子控件view放到数组的最后面，显示在最上面</span>
- (<span class="hljs-keyword">void</span>)bringSubviewToFront:(<span class="hljs-built_in">UIView</span> *)view;
<span class="hljs-comment">//将子控件view放到数组的最前面，显示在最下面</span>
- (<span class="hljs-keyword">void</span>)sendSubviewToBack:(<span class="hljs-built_in">UIView</span> *)view;
</code></pre>
<h2 id="">自定义按钮步骤</h2>
<ul>
<li>1.创建一个继承自UIButton的子类，比如YSButton</li>
<li>2.重写初始化，设置数据,layoutSubviews方法在初始化方法中设置基本属性</li>
<li>3.在layoutSubviews方法中调整子控件的位置
让按钮内的文字多行显示除设置numberOfLines = 0，还要设置按钮宽度，将宽度设置为小于等于宽度会随着文字多少来定</li>
</ul>
</li>
</ul>
<h1 id="">图片拉伸三种方法</h1>
<ul>
<li><p>1.image = [image resizableImageWithCapInsets:UIEdgeInsetsMake(30, 0, 30, 30) resizingMode:UIImageResizingModeStretch];</p>
</li>
<li><p>2.image = [image stretchableImageWithLeftCapWidth:image.size.width<em>0.5 topCapHeight:image.size.height </em> 0.5];</p>
</li>
<li><p>3.xcode里设置</p>
<ul>
<li>imageNamed加载图片，当对象销毁时，图片对象不会随着一起销毁
相同图片只会加载一份到内存中
经常用在一些图片在多个界面都会使用，并且图片较小，使用频率高(图标/小的背景图)
imagewithContentOfFile加载图片，当对象销毁时，图形对象会随着一起销毁
相同图片会多次加载到内存中
经常用在：只在一个地方使用，并且图片较大，使用频率不高(版本新特性)</li>
</ul>
</li>
<li><p>使用xib封装一个自定义view的步骤</p>
<ul>
<li>新建一个继承UIView的自定义view,假设类名叫做(MJAppView)</li>
<li>新建一个MJAppView.xib文件来描述MJAppView内部的结构</li>
<li>修改UIView的类型为MJAppView真是类型</li>
<li>将内部的子控件跟MJAppView进行属性连线</li>
<li>MJAppView提供一个模型属性</li>
<li>重写模型属性的set方法,因为在set方法中可以拿到外界传递的模型数据</li>
<li>把模型数据拆开,分别设置数据到对应的子控件中</li>
<li>补充:提供一个创建MJAppView的类方法,将读取xib文件的代码屏蔽起来</li>
</ul>
</li>
<li><p>UIButton与UIImageView的区别</p>
<ul>
<li>显示图片
UIImageView只能显示一种图片
UIButton能显示2种图片背景图(填充整个UIButton)前置(覆盖在背景上的图片)</li>
<li>显示文字
UIImageView不能显示文字
UIButton可以显示文字</li>
<li>点击事件
UIImageView默认不能响应点击事件
UIButton能响应点击事件</li>
<li>使用场合
UIImageView：只显示图片，一般不监听点击
UIButton：既显示图片，又监听点击，点击了图片后做一些其他事情</li>
<li>继承结构
UIButton之所以能添加监听事件，是因为它继承自UIControl
UIImageView之所以不能添加监听事件，是因为它直接继承自UIView</li>
</ul>
</li>
<li><p>IBAction、IBOutlet的作用
从返回值角度上相当于void，但比void多了一层功能保证方法可以连线</p>
</li>
</ul>
<p>frame:改位置\尺寸 bounds：改尺寸(x,y都是0) center：改位置 transform:位置\尺寸\旋转角度</p>
<p>当UIView需要显示到屏幕上时，会调用drawRect:方法进行绘图，并且会将所有内容绘制在自己的图层上，绘图完毕后，系统会将图层拷贝到屏幕上，于是就完成了UIView的显示
UIView本身不具备显示的功能，是它内部的层才有显示功能</p>
<p>每一个UIView内部都默认关联着一个CALayer，我们可称这个Layer为Root Layer（根层）
所有的非Root Layer，也就是手动创建的CALayer对象，都存在着隐式动画
什么是隐式动画？
当对非Root Layer的部分属性进行修改时，默认会自动产生一些动画效果
而这些属性称为Animatable Properties(可动画属性)
列举几个常见的Animatable Properties：
bounds：用于设置CALayer的宽度和高度。修改这个属性会产生缩放动画
backgroundColor：用于设置CALayer的背景色。修改这个属性会产生背景色的渐变动画
position：用于设置CALayer的位置。修改这个属性会产生平移动画</p>
<ul>
<li>UISwitch</li>
<li>UISwitch继承自UIControl,因此也能像UIButton一样监听一些事件,比如状态改变事件</li>
<li>UISwitch可以通过拖线监听状态改变</li>
<li>UISwitch可以通过addTarget:...方法监听状态改变</li>
<li>(void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents;
// 其中controlEvents参数传递的是:UIControlEventValueChanged(值改变事件)</li>
</ul>
</section>
</div>
</div>
</div>
<a href="../base/README.html" class="navigation navigation-prev " aria-label="Previous page: base"><i class="fa fa-angle-left"></i></a>
<a href="../jiugongge/README.html" class="navigation navigation-next " aria-label="Next page: jiugongge"><i class="fa fa-angle-right"></i></a>
</div>
</div>
<script src="../gitbook/app.js"></script>
<script src="https://cdn.mathjax.org/mathjax/2.4-latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
<script src="../gitbook/plugins/gitbook-plugin-mathjax/plugin.js"></script>
<script>
require(["gitbook"], function(gitbook) {
var config = {"fontSettings":{"theme":null,"family":"sans","size":2}};
gitbook.start(config);
});
</script>
</body>
</html>