Cocoa touch 多个屏幕尺寸不支持在UIView中绘制线？
我想在基于UIView高度的UIView中绘制线。（即）线条高度应等于UIView的高度。为此，我使用以下代码Cocoa touch 多个屏幕尺寸不支持在UIView中绘制线？,cocoa-touch,uiview,core-graphics,Cocoa Touch,Uiview,Core Graphics,我想在基于UIView高度的UIView中绘制线。（即）线条高度应等于UIView的高度。为此，我使用以下代码 - (void)testDraw :(void(^)(UIImage *image, UIImage *selectedImage))done { CGSize imageSize = CGSizeMake(1000, self.bounds.size.height); //Begin the animation by checking the
- (void)testDraw :(void(^)(UIImage *image, UIImage *selectedImage))done
{
CGSize imageSize = CGSizeMake(1000, self.bounds.size.height);
//Begin the animation by checking the screen is retina / ordinary
if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0.0f);
else
UIGraphicsBeginImageContext(imageSize);
CGContextRef context = UIGraphicsGetCurrentContext();
for (NSInteger intSample=0; intSample < 1000; intSample++) {
if(intSample % self.samplesPerSecond == 0){
//draw separator line
[self drawLine:context fromPoint:CGPointMake(intSample, 0) toPoint:CGPointMake(intSample, self.frame.size.height) color:self.lineColor lineWidth:2.0];
}
}
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
CGRect drawRect = CGRectMake(0, 0, image.size.width, self.frame.size.height);
[self.progressColor set];
UIRectFillUsingBlendMode(drawRect, kCGBlendModeSourceAtop);
UIImage *tintedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
done(image, tintedImage);
}
//Draw the line based on the value received
- (void) drawLine:(CGContextRef) context fromPoint:(CGPoint) fromPoint toPoint:(CGPoint) toPoint color:(UIColor*) color lineWidth:(float) lineWidth{
CGContextBeginPath(context);
//add the lines with sizes that u want
CGContextSetAlpha(context,1.0);
CGContextSetLineWidth(context, lineWidth);
CGContextSetStrokeColorWithColor(context, [color CGColor]);
CGContextMoveToPoint(context, fromPoint.x, fromPoint.y);
CGContextAddLineToPoint(context, toPoint.x, toPoint.y);
CGContextStrokePath(context);
}
-（void）testDraw:（void（^）（UIImage*image，UIImage*selectedImage））完成
{
cgsizeimagesize=CGSizeMake（1000，self.bounds.size.height）；
//通过检查屏幕是否正常开始动画
如果（[[UIScreen Main Screen]响应选择器：@选择器（比例）]）
UIGraphicsBeginImageContextWithOptions（图像大小，编号，0.0f）；
其他的
UIGraphicsBeginImageContext（图像大小）；
CGContextRef context=UIGraphicsGetCurrentContext（）；
对于（NSInteger intSample=0；intSample<1000；intSample++）{
if（intSample%self.samplesPerSecond==0）{
//画分隔线
[自绘制线：上下文fromPoint:CGPointMake（intSample，0）toPoint:CGPointMake（intSample，self.frame.size.height）颜色：self.lineColor线宽：2.0]；
}
}
UIImage*image=UIGraphicsGetImageFromCurrentImageContext（）；
CGRect drawRect=CGRectMake（0,0，image.size.width，self.frame.size.height）；
[self.progresscolorset]；
UIRectFillUsingBlendMode（drawRect、KCGBlendModeSourceTop）；
UIImage*TinteImage=UIGraphicsGetImageFromCurrentImageContext（）；
UIGraphicsSendImageContext（）；
完成（图像、着色图像）；
}
//根据收到的值绘制线
-（void）绘图线：（CGContextRef）上下文fromPoint：（CGPoint）fromPoint toPoint：（CGPoint）toPoint颜色：（UIColor*）颜色线宽：（float）线宽{
CGContextBeginPath（上下文）；
//添加具有所需大小的线条
CGContextSetAlpha（上下文，1.0）；
CGContextSetLineWidth（上下文，线宽）；
CGContextSetStrokeColorWithColor（上下文，[color CGColor]）；
CGContextMoveToPoint（上下文，fromPoint.x，fromPoint.y）；
CGContextAddLineToPoint（上下文，toPoint.x，toPoint.y）；
CGContextStrokePath（上下文）；
}