- (UIImage*) drawText:(NSString*)text inImage:(UIImage*)image
{
//prepare image context
UIGraphicsBeginImageContext(image.size);
//draw image, (画图片)
[image drawInRect:CGRectMake(0, 0, image.size.width, image.size.height)];
//set text attributes (font, color, etc)
UIFont *textFont = [UIFont boldSystemFontOfSize:17.];
UIColor *textColor = [UIColor whiteColor];
NSDictionary *attributeDict = @{NSFontAttributeName:textFont, NSForegroundColorAttributeName:textColor};
//draw text (画文字)
[text drawInRect:CGRectMake(0, 0, image.size.width, image.size.height) withAttributes:attributeDict];
//get image from current image context
UIImage *editedImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return editedImage;
}