我有一个 UIImageView,我添加了 init..
self.imageView = [[UIImageView alloc]init];
imageView.frame = CGRectMake(0 ,-20, 780, 50);
imageView.backgroundColor = [UIColor redColor];
[self addSubview:imageView];
和
- (void)drawRect:(CGRect)rect {
// Drawing code
if (self.itemCount == 0) return;
int drawedUpToXPosition = 0;
...............
}
我怎样才能(void)drawRect:(CGRect)rect
在UIImageView object (imageView)
. 我想在imageView
. 请帮忙。
我有一个 DrawRect 方法,我将在图像上绘图。我用
- (void) onTimer:(NSTimer *) theTimer
{
if (!self.timerIsRunning)
[theTimer invalidate];
for (int i = 0; i < self.itemCount; i++)
{
TickerItem *ticker = [itemList objectAtIndex:i];
if (ticker.isVisible)
ticker.currentX -= 1;
}
}
功能。如何调用 DrawRect 方法?