Swift实战

swift学习也快有一个月了。文章也写了不少。今天来发布一个小ＤＥＭＯ。当操刀练手了。

主要写一个小控件，实现功能是类拟IPHONE手机打开AppStore 中的详细信息中的内容，先显示一部分，点击更多时，再加载完成。

目前只对单文本字体作处理，对于富文本的并不行。因此作为swift的操刀之作，还算是处女作吧。。。。。

源码：

整个控件的源码在:http://download.csdn.net/detail/fengsh998/7552229

其中这个“更多“的位置可以自行调整，当点击更多时，就会展示全部：

核心代码：

[cpp]view plaincopy 
   
 //morebtn
 funcdrawMoreInRect(moreRect:CGRect)
 {
 
  @H_403_53@ varctx=UIGraphicsGetCurrentContext(); CGContextSaveGState(ctx);
 
  @H_403_53@  varraduis=CGRectGetHeight(moreRect)/2.0
 varmaxX=CGRectGetMaxX(moreRect)
 
  @H_403_53@ varminX=CGRectGetMinX(moreRect) varmaxY=CGRectGetMaxY(moreRect)
 
  @H_403_53@ varminY=CGRectGetMinY(moreRect) 
 
  @H_403_53@ CGContextMoveToPoint(ctx,minX,minY) CGContextAddArcToPoint(ctx,maxX,minY,maxY,raduis)
 
  @H_403_53@ CGContextAddArcToPoint(ctx,raduis) CGContextClosePath(ctx)
 ifselectedHightlight
 
  @H_403_53@ { CGContextSetRGBFillColor(ctx,29/255.0,158/255.0,245/255.0,1.0)
 
  @H_403_53@ }else
 CGContextDrawPath(ctx,kCGPathFill)//根据坐标绘制路径
 CGContextRestoreGState(ctx)
 
  @H_403_53@ overridefuncdrawRect(rect:CGRect) varattributedString=NSMutableAttributedString(string:self.text)
 letlen=countElements(String(self.text))
 letfname=self.font.fontName
//StringconverttoCFString
 
  @H_403_53@ //letcfstr:CFString=reinterpretCast(fname.withCString(getenv)) letmfont=self.font
 varattributes=NSMutableDictionary()
 attributes.setObject(mfont,forKey:kCTFontAttributeName)
 attributedString.addAttributes(attributes,range:NSMakeRange(0,len))
 self.attributedText=attributedString;
 varframesetter=CTFramesetterCreateWithAttributedString(attributedString)
 varPath=CGPathCreateMutable()
 varrectWidth=self.bounds.size.width
 CGPathAddRect(Path,nil,CGRectMake(0,rectWidth,CGFLOAT_MAX))
 varframe=CTFramesetterCreateFrame(framesetter,CFRangeMake(0,0),Path,nil)
 varrows=CTFrameGetLines(frame)
 iflethasRows=rows?
//获取frame中的行数
 varnumberOfLines=CFArrayGetCount(rows)
//println("rows=\(numberOfLines)")
 varfontLineHeight=self.font.lineHeight
 vartextOffset=self.font.ascender
 varctx=UIGraphicsGetCurrentContext()
 CGContextSaveGState(ctx)
//距左上位置设置
 CGContextTranslateCTM(ctx,0)
 
  @H_403_53@ CGContextSetTextMatrix(ctx,CGAffineTransformMakeScale(1,-1))forvarlineNumber=0;lineNumber<numberOfLines;lineNumber++
 varonlyline=CFArrayGetValueAtIndex(rows,lineNumber)
 varflush:Double=0.0
 varonlycline:CTLine=reinterpretCast(onlyline)
 varpenOffset=CTLineGetPenOffsetForFlush(onlycline,flush,rect.size.width)
 CGContextSetTextPosition(ctx,penOffset,textOffset);
//println("第\(lineNumber)行\(onlycline)")
//获取第onlycline行中的字形数
//varnums=CTLineGetGlyphCount(onlycline)
//println("本行的字符数\(nums)")
ifletmp=morepoint
 varposline=mp.row
 varposclm=mp.column
 varbool_lastline=(posline==numberOfLines-1)?true:false
iflineNumber==posline&&!self.expand
 vartruncatedString=NSAttributedString(string:"\u2026")
 
  @H_403_53@ vartoken=CTLineCreateWithAttributedString(truncatedString) varrange=CTLineGetStringRange(onlycline)
 varmaxlengthInline=range.length
 posclm=min(posclm,maxlengthInline)
//获取onlycline中一黄有几个CTRun,一般情况下，一行中只有一个CTRun
 
  @H_403_53@ varruns=CTLineGetGlyphRuns(onlycline) varrunsNums=CFArrayGetCount(runs)
 varrw=0.0
 
  @H_403_53@ varrh=0.0 varrowx=0.0
 
  @H_403_53@ varrowy=0.0ifrunsNums>0
//将COpaquePointer转为CTRun
 
  @H_403_53@ varrun:CTRun=reinterpretCast(CFArrayGetValueAtIndex(runs,0))//println("run=\(run)")
 
  @H_403_53@ varrunrange=CFRange(location:0,length:(posclm==0)?1:posclm)//println("runrange=\(runrange.length)")
 
  @H_403_53@ varrunsrect=CTRunGetImageBounds(run,ctx,runrange)//println("runsrect=\(runsrect)")
 
  @H_403_53@ rw=min(runsrect.size.width,rectWidth-40) rh=runsrect.size.height
 
  @H_403_53@ rowx=runsrect.origin.x rowy=runsrect.origin.y
 
  @H_403_53@ varnewline=CTLineCreateTruncatedLine(onlycline,rw,CTLineTruncationType.End,token) CTLineDraw(newline,ctx)
 varlinerect=CGRectMake(rowx,rowy,153); background-color:inherit; font-weight:bold">ifnewline
 linerect=CTLineGetImageBounds(newline,ctx)
 }
//println("本行文字占的rect\(linerect)")
//rh=min(rh,16)
//rh=max(rh,10)
 
  @H_403_53@ rh=16.0 moreBtnRect=CGRectMake(linerect.origin.x,
 linerect.origin.y-rh+3,40,rh)
 self.drawMoreInRect(moreBtnRect!)
 varmoretextrect=CGRectMake(moreBtnRect!.origin.x+rh/2+3,moreBtnRect!.origin.y+2,
 
  @H_403_53@ moreBtnRect!.size.width-rh,moreBtnRect!.size.height) varmoretext:NSString="更多"
 
  @H_403_53@ moretext.drawInRect(moretextrect,withFont:UIFont.systemFontOfSize(10))break
 CTLineDraw(onlycline,248); line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> textOffset+=fontLineHeight
 }//endfor
 CGContextRestoreGState(ctx);
 varcontentRect=CGRectMake(self.frame.origin.x,self.frame.origin.y,self.bounds.size.width,round(textOffset-self.font.ascender))
//println("contentRect=\(contentRect)")
ifcontentRect.size.height>self.bounds.size.height
 dispatch_async(dispatch_get_main_queue(),{
 self.viewFrameChangeBlock(self,contentRect)
 
  @H_403_53@ })//endif
 
  @H_403_53@ }

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