• <ins id="pjuwb"></ins>
    <blockquote id="pjuwb"><pre id="pjuwb"></pre></blockquote>
    <noscript id="pjuwb"></noscript>
          <sup id="pjuwb"><pre id="pjuwb"></pre></sup>
            <dd id="pjuwb"></dd>
            <abbr id="pjuwb"></abbr>

            UIWebView加上safari風格前進后退按鈕

            Posted on 2011-06-02 22:46 冷鋒 閱讀(3833) 評論(0)  編輯 收藏 引用 所屬分類: IOS開發
            今天在寫程序內打開網頁的功能,寫工具條的時候發現系統圖標里面竟然沒有后退按鈕,,由于我這個是靜態庫工程,不可能自己弄張圖上去,不然使用本庫的時候還得附上圖片,經過一下午的搜索,終于找到個比較靠譜的,這哥們硬是用代碼給畫出來個箭頭了(話說如果是其他不規則的圖形要咋辦呢?),還是google管用啊,baidu非常非常非常。。。垃圾。

            Code Example: Drawing the iPhone Back Button(轉載)

            Recently, I had need to provide a back button similar to the one used in Mobile Safari for a consulting project.

            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.

            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.

            Since this was a bit time consuming, I thought I would share in hopes that it saves someone else a little bit of time.

            - (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];
            }

            posts - 15, comments - 18, trackbacks - 0, articles - 0

            Copyright © 冷鋒

            久久婷婷五月综合国产尤物app| 精品人妻久久久久久888| 国产A级毛片久久久精品毛片| 久久亚洲国产精品一区二区| 国产免费福利体检区久久| 久久久精品国产免大香伊| 99久久无色码中文字幕| 久久一区二区三区99| 久久久精品2019免费观看| 99久久国产热无码精品免费久久久久| 无码人妻少妇久久中文字幕 | 久久精品国产精品亚洲精品 | 久久精品中文无码资源站| 国产精品久久久久久一区二区三区| 热99re久久国超精品首页| 色诱久久av| 久久r热这里有精品视频| 久久久午夜精品福利内容| 欧美一区二区精品久久| 中文字幕无码免费久久| 亚洲v国产v天堂a无码久久| 99久久国产热无码精品免费久久久久 | 国产午夜久久影院| 伊人久久大香线蕉综合Av| 无码任你躁久久久久久| 国产福利电影一区二区三区久久老子无码午夜伦不 | 欧美国产成人久久精品| 亚洲国产精品久久久久久| 欧美大香线蕉线伊人久久| 国产精品久久久久久久久软件| 国产呻吟久久久久久久92| 久久久久久久综合日本亚洲| 久久久一本精品99久久精品88| 久久久久se色偷偷亚洲精品av| 亚洲国产成人乱码精品女人久久久不卡 | 9久久9久久精品| 国产日产久久高清欧美一区| 国内精品久久久久影院优| 久久精品99久久香蕉国产色戒| 久久亚洲精品国产精品| 久久99精品久久久久久久久久|