var iNum,data;var el = document.getElementById("aDiv");var angle=0,angles=0;var pi = Math.PI;function degToRad(x){return( x/(360/(2*pi)));}function radToDeg(x){return( x*(360/(2*pi)));}function rotate(){var rad = degToRad(angle);costheta = Math.cos(rad);sintheta = Math.sin(rad);//var el = document.getElementById(name);if(el.filters){el.style.filter = "progid:DXImageTransform.Microsoft.Matrix()";el.filters.item("DXImageTransform.Microsoft.Matrix").SizingMethod = "auto expand";el.filters.item("DXImageTransform.Microsoft.Matrix").FilterType = "bilinear";el.filters.item("DXImageTransform.Microsoft.Matrix").M11 = costheta;el.filters.item("DXImageTransform.Microsoft.Matrix").M12 = -sintheta;el.filters.item("DXImageTransform.Microsoft.Matrix").M21 = sintheta;el.filters.item("DXImageTransform.Microsoft.Matrix").M22 = costheta;}else if(window.navigator.userAgent.indexOf("Firefox")>=1){el.style.MozTransform = "rotate("+angle+"deg)";}else if(window.navigator.userAgent.indexOf("Chrome")>=1){el.style.WebkitTransform = "rotate("+angle+"deg)";}else if(window.navigator.userAgent.indexOf("Safari")>=1){el.style.WebkitTransform = "rotate("+angle+"deg)";}else if(window.navigator.appName=="Opera"){el.style.OTransform = "rotate("+angle+"deg)";}}
求解釋里面部分代碼的原理，謝謝！
鴻蒙傳說
2023-04-24 22:18:05
