如何高效的绘制一段文字展示

@interface XXView : UIView
@end
@implementation XXView
- (void)drawRect:(CGRect)rect
{
    UIFont *font = [UIFont fontWithName:@"Helvetica Neue" size:13];
    NSDictionary *attributes = @{NSFontAttributeName:font,NSForegroundColorAttributeName:[UIColor redColor]};
    NSAttributedString *title = [[NSAttributedString alloc] initWithString:@"我是垂直居中的"
                                                                attributes:attributes];
    [title drawAtPoint:CGPointMake(CGRectGetMidX(self.bounds)-title.size.width/2, CGRectGetMidY(self.bounds)-title.size.height/2)];
}
@end