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我想在用户界面的现有视图中绘制条形图。在用户输入后计算单条高点并存储在数组中。在一个按钮被衬套最终绘制条形图之后，该数组应该传递给我的自定义 GraphView 类。但它不起作用。我不知道我是否正确传递了数组（如何检查它？）以及如何在我的 drawrect 方法中访问它以设置单条高点？一旦我NSNumber *balkenHoehe = [balkenArray objectAtIndex:i];输入 drawrect 方法并balkenHoehe作为 rect-hight 我得到错误。我需要做什么？谢谢！

这是我的代码：

我的 AppDelegate.h

#import <Cocoa/Cocoa.h>

@interface AppDelegate : NSObject <NSApplicationDelegate>

@property (assign) IBOutlet NSWindow *window;
@property (weak) IBOutlet NSTextField *eingabeNennmass;
@property (weak) IBOutlet NSTextField *eingabeToleranzOben;
@property (weak) IBOutlet NSTextField *eingabeToleranzUnten;
@property (weak) IBOutlet NSTextField *eingabeAnzahlWerte;
@property (weak) IBOutlet NSTextField *ausgabeMittelwert;
@property (weak) IBOutlet NSTextField *ausgabeToleranz
@property (weak, nonatomic) IBOutlet GraphView *ausgabeGraph;

- (IBAction)pushSimulation:(NSButton *)sender;

@end

我的 AppDelegate.m 缩短了

#import "GraphView.h" 
#import "AppDelegate.h"

implementation AppDelegate
....//couple calculating code and building the array klassenArray//...

    [klassenArray addObject:[NSNumber numberWithDouble: n]];
....//more code//...

[_ausgabeGraph setBalkenArray:klassenArray]; (connected with the GraphView view on the user interface)

....//more code//...

我的 GraphView.h

#import <Cocoa/Cocoa.h>

@interface GraphView : NSView
{

NSMutableArray *balkenArray;

}

- (NSMutableArray *) balkenArray;
- (void) setBalkenArray:(NSMutableArray *)abalkenArray;

@end

我的 GraphView.m

#import "GraphView.h"

@implementation GraphView

//*******************************
- (void) setBalkenArray:(NSMutableArray *)abalkenArray
{
    balkenArray = abalkenArray;
    [self setNeedsDisplay:YES];
}

//*******************************
- (NSMutableArray *)balkenArray
{
    return balkenArray;
}

//*******************************
- (id)initWithFrame:(NSRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {

    }

    return self;
}

//*******************************
- (void)drawRect:(NSRect)dirtyRect
{

    NSRect bounds = [self bounds];
    float fieldWith = bounds.size.width / 12.0;
    float fieldHeight = bounds.size.height / 12.0;

        //background
    NSRect hintergrundRect =
    hintergrundRect = NSMakeRect(bounds.origin.x, bounds.origin.y,
                                  bounds.size.width, bounds.size.height);
    [[NSColor grayColor] set];
    [NSBezierPath fillRect:hintergrundRect];

        //Diagram

    for (int i = 1; i<=10; i++) {
        NSNumber *balkenHoehe = [balkenArray objectAtIndex:i];
//        NSLog(@"rectnumber at index %d is %@", i, balkenHoehe);

        NSRect aRect =
        aRect = NSMakeRect (fieldWith*i, fieldHeight, fieldWith, balkenHoehe); //x, y, width, hight
        // draw rect
    [[NSColor whiteColor] set];
    [NSBezierPath fillRect:aRect];

        // draw border
    [[NSColor blackColor] set];
    NSBezierPath *aPath = [NSBezierPath bezierPathWithRect:aRect];
    [aPath setLineWidth:1];
    [aPath stroke];
    }
}


@end
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1 回答 1

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好的，在这里感谢我自己！好小子。我在 GrapView.h 中使用了 @property 和 @systnesize 东西

@interface GraphView : NSView
{
NSMutableArray *balkenArray;
}
@property(nonatomic, retain)NSMutableArray *balkenArray;
@property(readwrite, assign)double _maxKlasse;
@end

和 GraphView.m

@synthesize balkenArray, _maxKlasse;

在 AppDelegate.m 中，数组被发送到视图：

_ausgabeGraph.balkenArray=klassenArray;
_ausgabeGraph._maxKlasse=maxKlasse;
[_ausgabeGraph setNeedsDisplay:YES];

最后在 GraphView.m 中使用数组来绘制条形图：

... 代码 ...

for (int i = 1; i<=10; i++) {
  double _x = [(NSNumber*)[balkenArray objectAtIndex:i-1] doubleValue];

  //draw rect
  NSRect aRect =
    aRect = NSMakeRect (fieldWith * i, fieldHeight, fieldWith, (6*fieldHeight*_x/_maxKlasse)); //x, y, width, variable hight
    [[NSColor whiteColor] set];
    [NSBezierPath fillRect:aRect];

...更多代码...

感谢 Gabriele Petronella 使用属性和合成的提示。只要我了解它就更容易使用。我仍然需要学习命名约定。

于 2012-12-12T19:57:19.010 回答