锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#20154;&#20154;&#29408;&#29408;&#32508;&#21512;&#20037;&#20037;&#56;&#56;&#25104;&#20154;&#44;&#20037;&#20037;&#20037;&#31934;&#21697;&#20037;&#20037;&#20037;&#20037;&#20037;&#44;&#27431;&#32654;&#40635;&#35910;&#20037;&#20037;&#20037;&#20037;&#20037;&#20013;&#25991;</title><link>http://www.shnenglu.com/ifeng/articles/147984.html</link><dc:creator>鍐烽攱</dc:creator><author>鍐烽攱</author><pubDate>Thu, 02 Jun 2011 14:46:00 GMT</pubDate><guid>http://www.shnenglu.com/ifeng/articles/147984.html</guid><wfw:comment>http://www.shnenglu.com/ifeng/comments/147984.html</wfw:comment><comments>http://www.shnenglu.com/ifeng/articles/147984.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/ifeng/comments/commentRss/147984.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/ifeng/services/trackbacks/147984.html</trackback:ping><description><![CDATA[浠婂ぉ鍦ㄥ啓紼嬪簭鍐呮墦寮�緗戦〉鐨勫姛鑳斤紝鍐欏伐鍏鋒潯鐨勬椂鍊欏彂鐜扮郴緇熷浘鏍囬噷闈㈢珶鐒舵病鏈夊悗閫�鎸夐挳錛岋紝鐢變簬鎴戣繖涓槸闈欐�佸簱宸ョ▼錛屼笉鍙兘鑷繁寮勫紶鍥句笂鍘伙紝涓嶇劧浣跨敤鏈簱鐨勬椂鍊欒繕寰楅檮涓婂浘鐗囷紝澶氭澂鍏峰晩錛岀粡榪囦竴涓嬪崍鐨勬悳绱紝緇堜簬鎵懼埌涓瘮杈冮潬璋辯殑錛岃繖鍝ヤ滑紜槸鐢ㄤ唬鐮佺粰鐢誨嚭鏉ヤ釜綆ご浜嗭紝榪樻槸google綆＄敤鍟婏紝baidu闈炲父闈炲父闈炲父銆傘�傘�傚瀮鍦俱�?
<div>
<h2><a title="Permanent Link: Code Example: Drawing the iPhone Back Button"  rel="bookmark">Code Example: Drawing the iPhone Back Button錛堣漿杞斤級</a></h2>
<div>
<div><img src="http://outerlevel.com/blog/images/iPhoneBackButton.png" alt="" /></div>
<p>Recently, I had need to provide a back button similar to the one used in Mobile Safari for a consulting project.</p>
<p>Many of the buttons used in the built-in iPhone applications are made available via the SDK with built in button types and graphics. Unfortunately, the back button is not one of these.</p>
<p>Because I needed to display the toolbar button from inside a static library which can not include images, I had to render the back arrow directly in code.</p>
<p>Since this was a bit time consuming, I thought I would share in hopes that it saves someone else a little bit of time.</p>
<div>
<pre line="1">- (CGContextRef)createContext
{
// create the bitmap context
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(nil,27,27,8,0,
colorSpace,kCGImageAlphaPremultipliedLast);
CFRelease(colorSpace);
return context;
}
- (CGImageRef)createBackArrowImageRef
{
CGContextRef context = [self createContext];
// set the fill color
CGColorRef fillColor = [[UIColor blackColor] CGColor];
CGContextSetFillColor(context, CGColorGetComponents(fillColor));
CGContextBeginPath(context);
CGContextMoveToPoint(context, 8.0f, 13.0f);
CGContextAddLineToPoint(context, 24.0f, 4.0f);
CGContextAddLineToPoint(context, 24.0f, 22.0f);
CGContextClosePath(context);
CGContextFillPath(context);
// convert the context into a CGImageRef
CGImageRef image = CGBitmapContextCreateImage(context);
CGContextRelease(context);
return image;
}
- (UIBarButtonItem *)backButton
{
CGImageRef theCGImage = [self createBackArrowImageRef];
UIImage *backImage = [[UIImage alloc] initWithCGImage:theCGImage];
CGImageRelease(theCGImage);
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithImage:backImage
style:UIBarButtonItemStylePlain
target:self.webView
action:@selector(goBack)];
[backImage release], backImage = nil;
return [backButton autorelease];
}</pre>
</div>
</div>
</div><img src ="http://www.shnenglu.com/ifeng/aggbug/147984.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/ifeng/" target="_blank">鍐烽攱</a> 2011-06-02 22:46 <a href="http://www.shnenglu.com/ifeng/articles/147984.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>浣跨敤闈欐�佸簱鏃跺嚱鏁拌皟鐢ㄦ寚鍚戦敊璇�?/title><link>http://www.shnenglu.com/ifeng/articles/147334.html</link><dc:creator>鍐烽攱</dc:creator><author>鍐烽攱</author><pubDate>Fri, 27 May 2011 01:23:00 GMT</pubDate><guid>http://www.shnenglu.com/ifeng/articles/147334.html</guid><wfw:comment>http://www.shnenglu.com/ifeng/comments/147334.html</wfw:comment><comments>http://www.shnenglu.com/ifeng/articles/147334.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/ifeng/comments/commentRss/147334.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/ifeng/services/trackbacks/147334.html</trackback:ping><description><![CDATA[鏈�榪戣皟璇昳phone欏圭洰鏃訛紝鍙戠幇浣跨敤闈欐�佸簱鏃惰皟鐢ㄥ嚱鏁癆浼氱洿鎺ヨ煩鍒癇鍑芥暟鍘諱簡錛屽悗鏉ユ墠鍙戠幇鍘熸潵浣跨敤闈欐�佸簱鍑芥暟鏃舵槸鏍規嵁澶存枃浠剁殑鍑芥暟澹版槑欏哄簭鍘誨畾浣嶅嚱鏁扮殑錛岀敱浜庢垜鐨勯潤鎬佸簱鐨勫ご鏂囦歡鐨勫嚱鏁板０鏄庨『搴忚窡浣跨敤搴撴椂娣誨姞鐨勫ご鏂囦歡閲岀殑鍑芥暟澹版槑欏哄簭涓嶄竴鑷達紝瀵艱嚧浜嗘澂鍏鳳紝緗戜笂鎼滅儲浜嗕笅鏈変簺浜鴻鏄寜澶存枃浠舵潵鎼滅儲鍑芥暟鐨勶紝鏈変簺浜哄張璇翠笉鏄紝鑾潪鍚勪釜騫沖彴閮戒笉涓�鏍鳳紵姹傝В絳旓紝鏈夋湪鏈?<img src ="http://www.shnenglu.com/ifeng/aggbug/147334.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/ifeng/" target="_blank">鍐烽攱</a> 2011-05-27 09:23 <a href="http://www.shnenglu.com/ifeng/articles/147334.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>     <footer>
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