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今天我來演示一下jquery中opera的錯誤,關於對象轉換,下面是代碼(函數setColor(x,y)):Opera error:未捕獲的異常:TypeError:無法將'xxxxxx'轉換爲對象
colourpixel = $('#colour').css('background-color').match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);//["rgb(0, 70, 255", "0", "70", "255"]
var canvas = document.createElement('canvas');
canvas.height=190;
canvas.width=190;
canvascontext = canvas.getContext("2d");
defaultdata = $('#light').get(0).getContext("2d").getImageData(0,0,190,190);
canvascontext.putImageData(defaultdata,0,0);
canvascontext.globalCompositeOperation = 'destination-atop';
canvascontext.fillStyle='rgb('+colourpixel[1]+', '+colourpixel[2]+', '+colourpixel[3]+')';
這裏是歌劇拋出的錯誤:
Uncaught exception: TypeError: Cannot convert 'colourpixel' to object
Error thrown at line 157, column 1 in setColor(x, y) in file://localhost/home/angelus/Desarrollo/webs/ColorP/functions.js:
canvascontext.fillStyle='rgb('+colourpixel[1]+', '+colourpixel[2]+', '+colourpixel[3]+')';
called from line 61, column 2 in <anonymous function>(event) in file://localhost/home/angelus/Desarrollo/webs/ColorP/functions.js:
setColor(x,y);
called from line 55, column 294 in <anonymous function: handle>(a) in file://localhost/home/angelus/Desarrollo/webs/ColorP/jquery.min.js:
i=i.handler.apply(this,arguments);
called via Function.prototype.apply() from line 49, column 569 in <anonymous function: o>() in file://localhost/home/angelus/Desarrollo/webs/ColorP/jquery.min.js:
return typeof c!=="undefined"&&!c.event.triggered?c.event.handle.apply(o.elem,arguments):w
我試圖創建一個像一個數組(VAR colourpixel =新的Array();)的對象,但沒有運行。
預先感謝您!
@Nick「歌劇引發的錯誤」 – lonesomeday 2010-10-10 10:57:39
@Angelus爲什麼不把最後一個括號添加到正則表達式中並執行'canvascontext.fillStyle = colourpixel [0];'? – lonesomeday 2010-10-10 11:01:55
因爲如果我把一個;那裏,有一個sintax問題寬度字符串連接沒有? – 2010-10-10 11:03:17