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)];