Question

我有自定义视图图表和视图控制器的视图GraphViewController。我正在实现简单的图表。

这是Chart.h的代码

#import 


@interface Chart : UIView {
    BOOL hideChart;
}
@property BOOL hideChart;
- (void) drawAxesInContext:(CGContextRef)context;
- (void) drawUserChartinContext:(CGContextRef)context;
@end

Chart.m


- (void)drawRect:(CGRect)rect
{
    CGContextRef ctxt = UIGraphicsGetCurrentContext();
    [self drawAxesInContext:ctxt]; 
    [self drawUserChartinContext:ctxt];
}

- (void) drawAxesInContext:(CGContextRef)context {
    CGContextTranslateCTM(context, nullX, nullY);
    CGContextScaleCTM(context, 1.0, -1.0);
    CGContextSetLineWidth(context, 3);
    CGContextBeginPath(context);   

    for (int i=0; i 

As you can see on screenshot I have uibutton "hide". I want to hide graph (not axes) by pressing this button.
In viewController I created ibaction

- (IBAction) hideAndShow {
    self.chart.hideChart = YES;
}


and in view u can see 


    if (hideChart) {
    [[UIColor blackColor] setStroke];
        [self setNeedsDisplay];
        NSLog(@"hide");
    }

但它不起作用，你有什么想法我怎么能做到这一点？ http://dl.dropbox.com/u/866144/Voila_Capture7.png

Answer 1

我建议为hideChart添加一个自定义setter，类似这样的

- (void)setHideChart:(BOOL)isHidden {
    self.isHidden = isHidden;
}

隐藏自定义UIView中的图形

1 个答案: