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<div style="border-width:0px; padding:0px; margin:0px; list-style:none; color:rgb(51,51,51); font-family:宋体; font-size:14px; line-height:28px"> 在iOS中常用的绘图框架就是Quartz 2D,Quartz 2D是Core Graphics框架的一
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<p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; font-family:Arial; font-size:14px; line-height:26px"> <span style="font-size:18px">首先了解一下CGContextRef:</span></p>
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<span style="font-family:Helvetica,Tahoma,Arial,sans-serif; font-size:14px; line-height:25.200000762939453px">第一种方式: </span><br style="font-family:Helvetica,Tahoma,Arial,sans-serif; font-size:14px
<br><br><p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; font-family:Arial; font-size:14px; line-height:26px"> <span style="font-size:18px">Timers的替代方法</span></p>
<span style="font-family:Arial; font-size:14px; line-height:26px"> </span><br style="font-family:Arial; font-size:14px; line-height:26px"><p style="margin-top:0px; margin-bottom:0px; padding-top:
<p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; font-family:Arial; font-size:14px; line-height:26px"> <span style="font-size:18px"> iOS的沙盒机制,应用只能访问自己应用目录下的
<span style="font-family:'Courier New'; margin:0px; padding:0px; line-height:1.5; color:rgb(0,128,0)">/*</span><span style="font-family:'Courier New'; margin:0px; padding:0px; line-height:1.5; col
<p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,STheiti,微软雅黑,黑体,Arial,Tahoma,sans-serif,serif; font-si
<p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; font-family:'lucida Grande',Tahoma,Arial,Helvetica,宋体,sans-serif; line-height:26px"> 谈到这个点的时候,我首先想到的是苹果公司是如何从濒临破产
<p style="color:rgb(51,51,51); font-family:Arial; font-size:14px; line-height:26px"> 在你读这篇文章之前,如果你不嫌读英文太累,推荐阅读下苹果<span id="book_title">iOS Human Interface Guidelines</span>中<a target="_blank" hre
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<p style="color:rgb(51,51,51); font-family:Arial; font-size:14px; line-height:26px"> 想在initWithFrame或者其他函数里调用UIGraphicsGetCurrentContext()函数,</p> <p style="color:rgb(51,51,51); font-family:Arial
<span style="font-size:24px">1、简介Quartz。Quartz 是主要的描画接口,支持基于路径的描画、抗锯齿渲染、渐变填充模式、图像、颜色、坐标空间变换、以及PDF 文档的创建、显示、和分析。UIKit 为Quartz 的图像和颜色操作提供了Objective-C 的封装。Core Animation 为很多UIKit 的视图属性声明的动画效果提供底层支持,也
<p style="color:rgb(51,51,51); font-family:Arial; font-size:14px; line-height:26px; margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px"> Graphics Context是图形上下文,可以将其理解为一块画布,我们可
<strong><span style="font-size:18px">size_t在C语言中就有了。它是一种“整型”类型,里面保存的是一个整数,就像int, long那样。这种整数用来记录一个大小(size)。size_t的全称应该是size type,就是说“一种用来记录大小的数据类型”。通常我们用sizeof(XXX)操作,这个操作所得到的结果就是size_t类型。因为size_t
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<h1 style="margin:0px; padding:0px; font-family:Arial; line-height:26px">const</h1> <div style="font-family:Arial; font-size:14px; line-height:26px">const最好理解,修饰的东西不能被修改</div> <div style="font-f
<span style="background-color:rgb(255,255,255)"><span style="font-family:simsun; font-size:14px; line-height:21px">iOS设备都具有一定的局限性,开发者只能力求使其不断趋于完美。每一阶段的iOS开发都与遇到很多的问题,开发者和专家也在不断总结经验,与大家一起分享心得和体会。</