6

我尝试用不同颜色绘制 UIBezierPath 线失败了。所有线条都变为当前选定的颜色。我所有的路径和信息都存储在一个名为 pathInfo 的 NSMutableArray 中。在路径信息中，我放入包含路径、颜色、宽度和线类型的数组。这很好用，除了所有的线条都变成用户选择的任何颜色。我将不胜感激任何帮助！

- (void)drawRect:(CGRect)rect {
    UIBezierPath *drawPath = [UIBezierPath bezierPath];
    drawPath.lineCapStyle = kCGLineCapRound;
    drawPath.miterLimit = 0;

    for (int i = 0; i < [pathInfo count]; i++){
        NSArray *row = [[NSArray alloc] initWithArray:[pathInfo objectAtIndex:i]];
        NSLog(@"Path: %@",[row objectAtIndex:0]);
        NSLog(@"Color: %@",[row objectAtIndex:1]);
        NSLog(@"Width: %@",[row objectAtIndex:2]);
        NSLog(@"Type: %@",[row objectAtIndex:3]);

        //width
        drawPath.lineWidth = [[row objectAtIndex:2] floatValue];

        //color
        [[row objectAtIndex:1] setStroke];

        //path
        [drawPath appendPath:[row objectAtIndex:0]];

    }

   UIBezierPath *path = [self pathForCurrentLine];
    if (path)
     [drawPath appendPath:path];

   [drawPath stroke];
}

- (UIBezierPath*)pathForCurrentLine {
    if (CGPointEqualToPoint(startPoint, CGPointZero) && CGPointEqualToPoint(endPoint, CGPointZero)){
        return nil;
    }

    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:startPoint];
    [path addLineToPoint:endPoint];

    return path;

}
4

2 回答 2

3

笔触/填充颜色仅影响-stroke命令。它们不影响-appendPath:命令。路径不包含每段颜色信息。

如果您需要多色线条，则需要分别描边每种颜色。

于 2013-02-15T21:35:16.477 回答
2

设置你的笔触颜色（以及你有什么），然后stroke，然后移动到下一条路径：

- (void)drawRect:(CGRect)rect
{
    for (int i = 0; i < [pathInfo count]; i++){
        NSArray *row = [[NSArray alloc] initWithArray:[pathInfo objectAtIndex:i]];

        NSLog(@"Path: %@",[row objectAtIndex:0]);
        NSLog(@"Color: %@",[row objectAtIndex:1]);
        NSLog(@"Width: %@",[row objectAtIndex:2]);
        NSLog(@"Type: %@",[row objectAtIndex:3]);

        UIBezierPath *path = [row objectAtIndex:0];

        path.lineCapStyle = kCGLineCapRound;
        path.miterLimit = 0;

        //width
        path.lineWidth = [[row objectAtIndex:2] floatValue];

        //color
        [[row objectAtIndex:1] setStroke];

        //path
        [path stroke];
    }

    UIBezierPath *path = [self pathForCurrentLine];
    if (path)
    {
        // set the width, color, etc, too, if you want
        [path stroke];
    }
}
于 2013-02-15T22:32:39.487 回答