iphone - 用 UIImage 绘制图案不像图案，但它在 UIView 中填充了 UIImage

Question

我的代码行：

UIColor *brushPattern=[[UIColor alloc]initWithPatternImage:[UIImage imageNamed:@"Frame-1@2x.png"]];
CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(),brushPattern.CGColor);
Image pattern

网址

它不像画笔图案那样绘制，而是填充图案UIView

Answer 1

我已经使用了以下代码

在 ViewDidLoad 或您要开始分配的地方

 patternColor = [UIColor colorWithPatternImage:image] 

这将解决您的内存问题，下面的代码将帮助您

UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, [[UIScreen mainScreen] scale]);

CGContextRef context = UIGraphicsGetCurrentContext();
[view.image drawInRect:CGRectMake(0, 0, view.frame.size.width, view.frame.size.height)];

CGContextSetInterpolationQuality(context, kCGInterpolationHigh);
CGContextSetLineCap(context, kCGLineCapRound);
CGContextSetLineWidth(context, 10);

CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), patternColor.CGColor);
CGContextSetBlendMode(context, kCGBlendModeNormal);

CGContextBeginPath(context);
CGContextMoveToPoint(context, lastPoint.x, lastPoint.y);
CGContextAddLineToPoint(context, currentPoint.x, currentPoint.y);
CGContextStrokePath(context);
UIImage * img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();