s7graphview 示例

发布于 2024-08-14 02:55:23 字数 348 浏览 4 评论 0原文

我正在寻找一个适用于 iPhone 的图形库，它允许我将文本设置为 X 轴上的值。快速查看 core-plot 后，它似乎无法做到这一点。我偶然发现了 s7graphview 但似乎无法让它工作。

有没有人确实成功了，并且可以与我分享？或者有一些例子的链接吗？它认为我的大脑只是因为迟到而关闭了，但我正在尝试；）

最诚挚的问候，保罗·皮伦

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野味少女 2024-08-21 02:55:23

Core Plot 确实支持 X 轴上的自定义刻度标签：

_{（来源：sunsetlakesoftware.com）}

要生成这些自定义标签，您只需将 X 轴的标签策略设置为 CPAxisLabelingPolicyNone 并提供您自己的标签策略。例如，您可以执行以下操作来复制上面的绘图（在 Core Plot iPhone 测试应用程序中）：

x.labelRotation = M_PI/4;
x.labelingPolicy = CPAxisLabelingPolicyNone;
NSArray *customTickLocations = [NSArray arrayWithObjects:[NSDecimalNumber numberWithInt:1], [NSDecimalNumber numberWithInt:5], [NSDecimalNumber numberWithInt:10], [NSDecimalNumber numberWithInt:15], nil];
NSArray *xAxisLabels = [NSArray arrayWithObjects:@"Label A", @"Label B", @"Label C", @"Label D", @"Label E", nil];
NSUInteger labelLocation = 0;
NSMutableArray *customLabels = [[NSMutableArray alloc] initWithCapacity:[xAxisLabels count]];
for (NSNumber *tickLocation in customTickLocations)
{
    CPAxisLabel *newLabel = [[CPAxisLabel alloc] initWithText: [xAxisLabels objectAtIndex:labelLocation++] textStyle:x.labelTextStyle];
    newLabel.tickLocation = [tickLocation decimalValue];
    newLabel.offset = x.labelOffset + x.majorTickLength;
    newLabel.rotation = M_PI/4;
    [customLabels addObject:newLabel];
    [newLabel release];
}

x.axisLabels =  [NSSet setWithArray:customLabels];

无需子类化 CPAxis 来添加这些标签。

Core Plot does indeed support custom tick labels on the X axis:

_{(source: sunsetlakesoftware.com)}

To produce these custom labels, you just need to set the labeling policy of the X axis to CPAxisLabelingPolicyNone and provide your own. For example, you can do the following to replicate the above drawing (in the Core Plot iPhone test application):

x.labelRotation = M_PI/4;
x.labelingPolicy = CPAxisLabelingPolicyNone;
NSArray *customTickLocations = [NSArray arrayWithObjects:[NSDecimalNumber numberWithInt:1], [NSDecimalNumber numberWithInt:5], [NSDecimalNumber numberWithInt:10], [NSDecimalNumber numberWithInt:15], nil];
NSArray *xAxisLabels = [NSArray arrayWithObjects:@"Label A", @"Label B", @"Label C", @"Label D", @"Label E", nil];
NSUInteger labelLocation = 0;
NSMutableArray *customLabels = [[NSMutableArray alloc] initWithCapacity:[xAxisLabels count]];
for (NSNumber *tickLocation in customTickLocations)
{
    CPAxisLabel *newLabel = [[CPAxisLabel alloc] initWithText: [xAxisLabels objectAtIndex:labelLocation++] textStyle:x.labelTextStyle];
    newLabel.tickLocation = [tickLocation decimalValue];
    newLabel.offset = x.labelOffset + x.majorTickLength;
    newLabel.rotation = M_PI/4;
    [customLabels addObject:newLabel];
    [newLabel release];
}

x.axisLabels =  [NSSet setWithArray:customLabels];

There's no need to subclass CPAxis to add these labels.

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墨离汐 2024-08-21 02:55:23

您可以更改标签名称，如

-(NSArray *)newAxisLabelsAtLocations:(NSArray *)locations
{
    NSMutableArray *newLabels = [[NSMutableArray alloc] initWithCapacity:locations.count];
    for ( NSDecimalNumber *tickLocation in locations ) {
        NSString *labelString = [self.labelFormatter stringForObjectValue:tickLocation];
        CPAxisLabel *newLabel = [[CPAxisLabel alloc] initWithText:[NSString stringWithFormat:@"Day %@",labelString] textStyle:self.labelTextStyle];
        //[newLabel setTextColor:[CPColor whiteColor]];
        newLabel.tickLocation = [tickLocation decimalValue];
        newLabel.rotation = self.labelRotation;
        switch ( self.tickDirection ) {
            case CPSignNone:
                newLabel.offset = self.labelOffset + self.majorTickLength / 2.0f;
                break;
            case CPSignPositive:
            case CPSignNegative:
                newLabel.offset = self.labelOffset + self.majorTickLength;
                break;
        }
        [newLabels addObject:newLabel];
        [newLabel release];
    }
    return newLabels;
}

core-plot 中的 CPAxis.m

希望这有帮助...;)

You can change the label names as

-(NSArray *)newAxisLabelsAtLocations:(NSArray *)locations
{
    NSMutableArray *newLabels = [[NSMutableArray alloc] initWithCapacity:locations.count];
    for ( NSDecimalNumber *tickLocation in locations ) {
        NSString *labelString = [self.labelFormatter stringForObjectValue:tickLocation];
        CPAxisLabel *newLabel = [[CPAxisLabel alloc] initWithText:[NSString stringWithFormat:@"Day %@",labelString] textStyle:self.labelTextStyle];
        //[newLabel setTextColor:[CPColor whiteColor]];
        newLabel.tickLocation = [tickLocation decimalValue];
        newLabel.rotation = self.labelRotation;
        switch ( self.tickDirection ) {
            case CPSignNone:
                newLabel.offset = self.labelOffset + self.majorTickLength / 2.0f;
                break;
            case CPSignPositive:
            case CPSignNegative:
                newLabel.offset = self.labelOffset + self.majorTickLength;
                break;
        }
        [newLabels addObject:newLabel];
        [newLabel release];
    }
    return newLabels;
}

in the CPAxis.m in core-plot

Hope this helps... ;)

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