ios UIImage 圖??居中

來源:本網整理

從圖片中按指定的位置大小截取圖片的一部分UIImage image 原始的圖片CGRect rect 要截取的區域(UIImage*)imageFromImage:(UIImage*)image inRect:(CGRect)rect {CGImageRef sourceImageRef=[image CGImage];CGImageRef newImageRef=CGImageCreateWithImageInRect(sourceImageRef,rect);UIImage*newImage=[UIImage imageWithCGImage:newImageRef];return newImage;}www.13333515.buzz防采集請勿采集本網。

<無詳細內??gt; scrolltotop.offset(100,120); scrolltotop.init();

[1].[代碼] [C/C++]代碼 跳至[1]

   CGSize size = bgImg.size; UIGraphicsBeginImageContext(size); float dwidth = (self.view.frame.size.width - size.width) /2.0f; float dheight = 0; CGRect rect = CGRectMake(dwidth, dheight, size.width, size.height); [bgImg drawInRect:rect]; UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); SyntaxHighlighter.autoloader( 'applescript/js/sh309/scripts/shBrushAppleScript.js?t=1451961936000', 'actionscript3 as3/js/sh309/scripts/shBrushAS3.js?t=1451961936000', 'bash shell/js/sh309/scripts/shBrushBash.js?t=1451961936000', 'coldfusion cf/js/sh309/scripts/shBrushColdFusion.js?t=1451961936000', 'cpp c/js/sh309/scripts/shBrushCpp.js?t=1451961936000', 'obj-c objc/js/sh309/scripts/shBrushObjC.js?t=1451961936000', 'c# c-sharp csharp/js/sh309/scripts/shBrushCSharp.js?t=1451961936000', 'css/js/sh309/scripts/shBrushCss.js?t=1451961936000', 'delphi pascal/js/sh309/scripts/shBrushDelphi.js?t=1451961936000', 'diff patch pas/js/sh309/scripts/shBrushDiff.js?t=1451961936000', 'erl erlang/js/sh309/scripts/shBrushErlang.js?t=1451961936000', 'groovy/js/sh309/scripts/shBrushGroovy.js?t=1451961936000', 'haxe hx/js/sh309/scripts/shBrushHaxe.js?t=1451961936000', 'java/js/sh309/scripts/shBrushJava.js?t=1451961936000', 'jfx javafx/js/sh309/scripts/shBrushJavaFX.js?t=1451961936000', 'js jscript javascript/js/sh309/scripts/shBrushJScript.js?t=1451961936000', 'perl pl/js/sh309/scripts/shBrushPerl.js?t=1451961936000', 'php/js/sh309/scripts/shBrushPhp.js?t=1451961936000', 'text plain/js/sh309/scripts/shBrushPlain.js?t=1451961936000', 'py python/js/sh309/scripts/shBrushPython.js?t=1451961936000', 'ruby rails ror rb/js/sh309/scripts/shBrushRuby.js?t=1451961936000', 'scala/js/sh309/scripts/shBrushScala.js?t=1451961936000', 'sql/js/sh309/scripts/shBrushSql.js?t=1451961936000', 'vb vbnet/js/sh309/scripts/shBrushVb.js?t=1451961936000', 'xml xhtml xslt html/js/sh309/scripts/shBrushXml.js?t=1451961936000' ); SyntaxHighlighter.all();

CIImage 是CoreImage框架中 的 可以很好的處理圖像效果 UIImage 是 UIKit框架中定義的圖像類 封裝了高層次的圖像類 view是容器,image就是文件,就是數據,容器里面放數據。所以imageView.backgroundImage

我們使用下面這個圖片作為按鈕圖片,這個圖片的邊緣沒有任何白色的像素但是最后顯示的效果確是這是放大后的效果,實際效果就是顯示出兩個很醒目的白點,我不知道這兩個白點是如何出現的,原圖中并沒有UIImage*btnImage=[[UIImage alloc]initWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"button-add"ofType:@"png"]];UIButton*btn=[UIButton buttonWithType:UIButtonTypeCustom];btn.bounds=CGRectMake(0,0,btnImage.size.width,btnImage.size.height);[btn setImage:faceImage forState:UIControlStateNormal];以上是我用來畫按鈕的代碼,是否針對透明的png圖片,還有一些特殊的設置?內容來自www.13333515.buzz請勿采集。

免責聲明 - 關于我們 - 聯系我們 - 廣告聯系 - 友情鏈接 - 幫助中心 - 頻道導航
Copyright © 2017 www.13333515.buzz All Rights Reserved
3排列五开奖结果