为什么没有调用drawRect方法？

Question

#import <UIKit/UIKit.h>

@interface quartzViewController : UIViewController {
 IBOutlet UIView *myView;

}

@end


#import "quartzViewController.h"

@implementation quartzViewController


   -(void)drawRect:(CGRect)rect
   {   

 CGContextRef  context = UIGraphicsGetCurrentContext();
 CGContextSelectFont(context, "Arial", 24, kCGEncodingFontSpecific);
 CGContextSetTextPosition(context,80,80);
 CGContextShowText(context, "hello", 6);
 //not even this works
 CGContextShowTextAtPoint(context, 1,1, "hello", 6);
   }

   - (void)viewDidLoad {
 [myView setNeedsDisplay];

 [super viewDidLoad];
   }

我是否必须在笔尖中进行任何更改？

谢谢

Answer 1

你已经将UIViewController子类化了,它没有要覆盖的drawRect.drawRect是UIView的一种方法.