我编写了一个函数,它每 2 秒在随机位置绘制 x 个正方形。一个正方形不能在同一个位置画两次。一旦应用程序完成一个循环,网格将被填充。现在,当绘制的正方形数量 <=8 时,这可以正常工作,但是当它更高时,一个正方形会随机绘制到与前一个正方形相同的位置。
我没有将正方形绘制到随机位置,而是尝试从顶部底部绘制它们,并且效果很好。
我已经调试了几天,我相信问题出在 setNeedsDisplayInRect 上。
希望有人可以提供帮助。对不起,如果我漫无目的,它已经晚了,我的头被捣碎了,大声笑:)
下面是代码......
- (void)drawRect:(CGRect)rect {
int count = [writeSquares count];
CGContextRef context = UIGraphicsGetCurrentContext();
int radius = 4;
for (int i = 0; i <count; i++)
{
Square *square = [writeSquares objectAtIndex: i];
CGContextSetLineWidth(context, 1);
//CGContextSetStrokeColorWithColor(context, [UIColor whiteColor].CGColor);
CGContextSetFillColorWithColor(context, [square color].CGColor);
CGContextMoveToPoint(context, CGRectGetMinX([square squareRect]) + radius, CGRectGetMinY([square squareRect]));
CGContextAddArc(context, CGRectGetMaxX([square squareRect]) - radius, CGRectGetMinY([square squareRect]) + radius, radius, 3 * M_PI / 2, 0, 0);
CGContextAddArc(context, CGRectGetMaxX([square squareRect]) - radius, CGRectGetMaxY([square squareRect]) - radius, radius, 0, M_PI / 2, 0);
CGContextAddArc(context, CGRectGetMinX([square squareRect]) + radius, CGRectGetMaxY([square squareRect]) - radius, radius, M_PI / 2, M_PI, 0);
CGContextAddArc(context, CGRectGetMinX([square squareRect]) + radius, CGRectGetMinY([square squareRect]) + radius, radius, M_PI, 3 * M_PI / 2, 0);
CGContextClosePath(context);
CGContextFillPath(context);
//NSLog(@"x = %f x = %f", CGRectGetMaxX([square squareRect]), CGRectGetMinX([square squareRect]));
}
//NSLog(@"Count %i", [writeSquares count]);
[writeSquares removeAllObjects];
}
-(void)drawInitializer:(int) counter{
if(extra != 0) {
[self setNeedsDisplay];
[grid removeAllObjects];
[self calculateGrid];
counter = counter + extra;
clear = YES;
extra = 0;
}
for(int i=0; i<counter; i++) {
int count = [grid count];
NSLog(@"counter %i", count);
if(count != 144) {
srandom(time(NULL));
int r = random() % [coordinates count];
Coordinate *coordinate = [coordinates objectAtIndex:r];
Square *square = [Square new];
[square setSquareRect: CGRectMake ([coordinate x] * 25, [coordinate y] * 25, 20, 20)];
[square setColor: [UIColor randomColor]];
[writeSquares addObject:square];
[grid addObject:square];
[square release];
[self setNeedsDisplayInRect:CGRectMake ([coordinate x] * 25, [coordinate y] * 25, 20, 20)];
[coordinates removeObjectAtIndex:r];
[coordinate release];
}
else {
extra++;
}
}
//[newlock release];
}