Quart2D文字图像绘制

 //获取画布
    CGContextRef context=UIGraphicsGetCurrentContext();
   //设置边框颜色
    CGContextSetStrokeColorWithColor(context, [UIColor redColor].CGColor);
    //文字绘制  两种绘制方法
    NSString *text=@"我是崔彦威";
    NSDictionary *dic=@{NSFontAttributeName:[UIFont systemFontOfSize:20],NSForegroundColorAttributeName:[UIColor redColor]};
    [text drawInRect:CGRectMake(0, 0, 200, 20) withAttributes:dic];
    [text drawAtPoint:CGPointMake(200, 0) withAttributes:dic];
    
    //图片绘制
    UIImage *img=[UIImage imageNamed:@"img.jpg"];
    //在矩形中绘制
//    [img drawInRect:CGRectMake(20, 20, 120, 120)];
    //以点开始绘制
//    [img drawAtPoint:CGPointMake(20, 20)];
    //平铺绘图
    [img drawAsPatternInRect:CGRectMake(20, 20, 240, 300)];