Question

这是代码，我收到的错误是：对“kCGLineCapRound”的引用含糊不清

- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];

    CGPoint currentLocation = [touch locationInView:self];

    UIGraphicsBeginImageContext(self.frame.size);
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    [self.image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
    CGContextSetLineCap(ctx,kCGLineCapRound);
    CGContextSetLineWidth(ctx, 5.0);
    CGContextSetRGBStrokeColor(ctx, 0.0, 0.0, 1.0, 1.0);
    CGContextBeginPath(ctx);
    CGContextMoveToPoint(ctx, location.x, location.y);
    CGContextAddLineToPoint(ctx, currentLocation.x, currentLocation.y);
    CGContextStrokePath(ctx);
    self.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    location = currentLocation;
}

我不知道如何摆脱这个错误，任何帮助表示赞赏！提前谢谢！

Answer 1

我认为您需要将CoreGraphics.framework添加到项目中。

http://docs.millennialmedia.com/iOS-SDK/iOSAddingFrameworks.html

如何修复Xcode中的“引用'kCGLineCapRound'是一个模糊的”错误

1 个答案: