如何绘制类似于下图的图形?
更具体地说,我的图表将分别具有橙色,绿色和红色的低,正常和高风险。每个包含x轴信息的气泡。
我想要完全像上面的图像,任何帮助将不胜感激,也请具体发布一些第三方库和所有。
如何实现上述图表?
注意 - 在X轴(日期)和Y轴[气泡中的(值)]。
修改
y轴由某个范围固定,x轴是来自服务器的NSMutableArray
提前致谢。
答案 0 :(得分:2)
绘制图形的第一步是创建X-Y轴布局。您可以使用UIBezierPath
和CAShapeLayer
绘制X和Y轴线。
UIBezierPath *graphPath = [[UIBezierPath alloc]init];
[graphPath setLineWidth:GRAPH_LAYOUT_LINE_WIDTH];
[[UIColor blackColor] setStroke];
[graphPath moveToPoint:CGPointMake(ORIGN_X, ORIGN_Y)];
[graphPath addLineToPoint:CGPointMake((ORIGN_X + TOTAL_X_DIST),ORIGN_Y)];
[graphPath stroke]; // drawing path
//Creating graph layout
CAShapeLayer *graphLayout = [CAShapeLayer layer];
graphLayout.fillColor = [[UIColor clearColor] CGColor];
graphLayout.strokeColor = [GRAPH_LAYOUT_COLOR CGColor];
graphLayout.lineWidth = GRAPH_LAYOUT_LINE_THICKNESS;
graphLayout.path = [graphPath CGPath];
[self.layer addSublayer:graphLayout];
重复以上代码绘制Y轴
其次,您需要创建X和Y轴刻度
float minX = 0;
float maxX = 10;
float minY = 0;
float maxY = 100;
float x1Unit = 1;
float y1Unit = 1;
self.spacingX = TOTAL_X_DIST/((maxX - minX)/x1Unit);
self.spacingY = TOTAL_Y_DIST/((maxY - minY+1)/y1Unit);
现在你需要得到一个数组中X和Y轴的值(笛卡尔坐标),这里我只是对点进行硬编码
//Enter the co-ordinates
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(0, 50)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(1, 20)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(2, 35)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(3, 55)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(4, 80)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(5, 60)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(6, 85)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(7, 50)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(8, 30)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(9, 10)]];
[self.pointsArray addObject:[NSValue valueWithCGPoint:CGPointMake(10, 05)]];
接下来,我们需要将笛卡尔坐标值转换为相对于父视图的x和y值。
// Creating (x,y) points based on superview coordinate system
for (NSValue *point in self.pointsArray)
{
CGPoint coordinate;
coordinate.x = (STARTING_X*x1Unit + ([point CGPointValue].x * self.spacingX) + self.spacingX/1.5)/x1Unit;
coordinate.y = (STARTING_Y*y1Unit - ([point CGPointValue].y * self.spacingY))/y1Unit;
[self.coordinateArray addObject:[NSValue valueWithCGPoint:coordinate]];
}
现在是时候添加漂亮的气泡了
for (int a = 0; a < [self.coordinateArray count]; a++)
{
CGPoint point = [[self.coordinateArray objectAtIndex:a] CGPointValue];
//Creating bubble for points on the graph.
UIView *bubble = [[UIView alloc] initWithFrame:BUBBLE_FRAME];
bubble.Layer.cornerRadius = BUBBLE_FRAME_WIDTH/2;
//Giving the color for the bubble based on the Y-Axis value
if (point.y <= 50)
{
bubble.backgroundColor = RED_COLOR;
}
else if (point.y > 50 && point.y <= 80)
{
bubble.backgroundColor = YELLOW_COLOR;
}
else
{
bubble.backgroundColor = GREEN_COLOR;
}
[self addSubview:bubble];
}
希望这有助于你