iphone - iOS 中的 Siri 聊天气泡颜色
<p><p>我尝试在核心图形中创建 Siri 聊天气泡。我正处于可以绘制形状的阶段。我被这里的颜色困住了。 Wanaa 获取边框颜色和填充颜色代码。
这是我到目前为止所做的..</p>
<pre><code>- (void)drawInContext:(CGContextRef)context
{
CGRect rect = gradientRectFrame;
CGFloat radius = 30;
CGFloat originBufferX = 0.0;
CGFloat originBufferY = 0.0;
CGFloat rightAngleTriangleWidth = 20.0;
CGFloat rightAngleTriangleHeight = 20.0;
CGFloat fullRectWidth = rect.size.width;
CGFloat fullRectHeight = rect.size.height;
CGPoint pointZero = CGPointMake(originBufferX, fullRectHeight);
CGPoint pointOne = CGPointMake(originBufferX + rightAngleTriangleWidth, fullRectHeight - rightAngleTriangleHeight);
CGPoint pointTwo = CGPointMake(originBufferX + rightAngleTriangleWidth, radius + originBufferY);
CGPoint pointThree = CGPointMake(originBufferX + fullRectWidth - radius, 0 + originBufferY);
CGPoint pointFour = CGPointMake(fullRectWidth, originBufferY + fullRectHeight - radius);
CGContextSetRGBFillColor(context, 105/255, 105/255, 105/255, 0.5);
CGContextSetLineWidth(context, 2.0);
CGContextMoveToPoint(context, pointZero.x, pointZero.y);
CGContextAddLineToPoint(context, pointOne.x, pointOne.y);
CGContextAddLineToPoint(context, pointTwo.x, pointTwo.y);
CGContextAddArc(context, rightAngleTriangleWidth + radius, originBufferY + radius, radius, M_PI, -M_PI_2, 0);
CGContextAddLineToPoint(context, pointThree.x, pointThree.y);
CGContextAddArc(context, fullRectWidth - radius, originBufferY + radius, radius, -M_PI_2, 0.0f, 0);
CGContextAddLineToPoint(context, pointFour.x, pointFour.y);
CGContextAddArc(context, fullRectWidth - radius, originBufferY + fullRectHeight - radius, radius, 0.0f, M_PI_2, 0);
CGContextAddLineToPoint(context, pointZero.x, pointZero.y);
CGContextFillPath(context);
CGContextSetRGBStrokeColor(context, 50/255, 50/255, 50/255, 0.5);
</code></pre>
<p>//CGContextSetRGBStrokeColor(context, 1.0, 0.0, 0.0, 1.0);</p>
<pre><code>CGContextStrokePath(context);
</code></pre>
<p>}</p>
<p> <img src="/image/qtbBk.png" alt="Chat Bubble"/> </p>
<p> <img src="/image/cPzdT.png" alt="enter image description here"/> </p>
<p>更新的代码:我现在使用 CGPath 而不是 CGContenxt 在填充路径后重新绘制路径。这是新的代码。虽然，我的笔触颜色还不是很接近..</p>
<pre><code>- (void)drawInContext:(CGContextRef)context
{
CGRect rect = gradientRectFrame;
CGFloat radius = 20;
CGFloat originBufferX = 0.0;
CGFloat originBufferY = 0.0;
CGFloat rightAngleTriangleWidth = 20.0;
CGFloat rightAngleTriangleHeight = 20.0;
CGFloat fullRectWidth = rect.size.width;
CGFloat fullRectHeight = rect.size.height;
CGPoint pointZero = CGPointMake(originBufferX, fullRectHeight);
CGPoint pointOne = CGPointMake(originBufferX + rightAngleTriangleWidth, fullRectHeight - rightAngleTriangleHeight);
CGPoint pointTwo = CGPointMake(originBufferX + rightAngleTriangleWidth, radius + originBufferY);
CGPoint pointThree = CGPointMake(originBufferX + fullRectWidth - radius, 0 + originBufferY);
CGPoint pointFour = CGPointMake(fullRectWidth, originBufferY + fullRectHeight - radius);
CGContextSetRGBStrokeColor(context, 0.8, 0.8, 0.8, 0.3);
CGMutablePathRef path = CGPathCreateMutable();
CGPathMoveToPoint(path, NULL, pointZero.x, pointZero.y);
CGPathAddLineToPoint(path, NULL, pointOne.x, pointOne.y);
CGPathAddLineToPoint(path, NULL, pointTwo.x, pointTwo.y);
CGPathAddArc(path, NULL, rightAngleTriangleWidth + radius, originBufferY + radius, radius, M_PI, -M_PI_2, 0);
CGPathAddLineToPoint(path, NULL, pointThree.x, pointThree.y);
CGPathAddArc(path, NULL, fullRectWidth - radius, originBufferY + radius, radius, -M_PI_2, 0.0f, 0);
CGPathAddLineToPoint(path, NULL, pointFour.x, pointFour.y);
CGPathAddArc(path, NULL, fullRectWidth - radius, originBufferY + fullRectHeight - radius, radius, 0.0f, M_PI_2, 0);
CGPathAddLineToPoint(path, NULL, pointZero.x, pointZero.y);
CGContextSaveGState(context);
CGContextAddPath(context, path);
CGContextSetLineWidth(context, 2.0f);
CGContextSetRGBFillColor(context, 1.0f, 1.0f, 1.0f, 0.1f);
CGContextFillPath(context);
CGContextAddPath(context, path);
CGContextStrokePath(context);
}
</code></pre>
<p> <img src="/image/kKveZ.png" alt="enter image description here"/> </p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>填充颜色主要是白色，不透明度约为 10%。所以原来的背景(类似织物的图案)会透出来，变得稍微亮一些。边框颜色也是白色，但不透明度约为 30%。</p>
<p>另外，边框的右侧和底部有轻微的阴影。</p>
<p>对于颜色，您大约需要:</p>
<pre><code>CGContextSaveGState(context);
CGContextSetShadow(context, CGSizeMake(-15f, -20f), 1.0f);
CGContextSetLineWidth(context, 2.0f);
CGContextSetRGBFillColor(context, 1.0f, 1.0f, 1.0f, 0.1f);
CGContextFillPath(context);
CGContextRestoreGState(context);
CGContextSetRGBStrokeColor(context, 1.0f, 1.0f, 1.0f, 0.3f);
CGContextStrokePath(context);
</code></pre></p>
<p style="font-size: 20px;">关于iphone - iOS 中的 Siri 聊天气泡颜色，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/8010500/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/8010500/
</a>
</p>
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