绘制文本并添加到UIImage iOS 5/6 [英] Draw text and add to a UIImage iOS 5/6

问题描述

我有一个文本框，我希望将书面文本添加到UIImage。

I have a textbox, where i want the written text to be added to a UIImage.

如何将NSString绘制为UIImage？

How can i draw NSString to a UIImage?

我搜索了一下，发现了很多例子，但是没有一个例子。 Xcode只给了我很多错误。

I´ve searched, and found lots of examples, but non of them works. Xcode just gives me lots of errors.

简单地说，我想在UIimage中绘制一个NSString。 UIImage应该与预定义的UIImageView相同，并放在中心。

Simply put, i want to draw a NSString to a UIimage. The UIImage should be the same size as a predefined UIImageView, and be placed in center.

任何想法？

推荐答案

我认为解决方案在这里......我在我的一个应用程序中使用了这个方法
这里lbltext是我的标签的对象。这种方法用给定的文本创建新图像&用文本返回新图像的对象。

i think solution is here..i have used this method in one of my application here lbltext is the object of my label. this method creates new image with given text & return the object of new image with text.

-(UIImage *) drawText:(NSString*) text inImage:(UIImage*)image atPoint:(CGPoint)point 
{
    UIFont *font = lblText.font;
    UIGraphicsBeginImageContext(iv.frame.size);
    [image drawInRect:CGRectMake(0,0,iv.frame.size.width,iv.frame.size.height)];
    CGRect rect = CGRectMake(point.x,point.y,lblText.frame.size.width, lblText.frame.size.height);
    [lblText.textColor set];
    [text drawInRect:CGRectIntegral(rect) withFont:font]; 
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

在您的下面评论中，您已通过iv.center作为一个点..尝试manualy喜欢这个

in your below comment you have passed iv.center as a point.. try manualy like this

CGPoint point;
point.x=30; // dynamicaly just for example lblText.frame.origin.x;
point.y=40; //lblText.frame.origin.y;

你必须像这样调用上述方法......

you have to call above method like this...

UIImage *img = [self drawText:@"Test String" inImage:originalImage atPoint:point];

这里，img是用于存储带图文的新图像的UIImage的另一个实例...在调用此方法之后使用img imager进一步使用..

here,img is another instace of UIImage for storing new image with text...after calling this method use img imager for your further use..

例如......

[newimageviewObj setImage:img];

我希望这能帮到你

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