合并uilabel和uiimageview [英] merging uilabel and uiimageview

问题描述

我从相册中选取了一张图片，并将其放在名为imageView的UIImageView中 然后，我在图像上添加了一些文本，使用UITextView作为输入源，并在uiimageview顶部使用UILabel来显示文本.

I picked an image from the photo album and put it in an UIImageView called imageView I then added some text over the image using UITextView as source of input and a UILabel on top of the uiimageview to display the text.

到目前为止一切都很好.

So far so good.

现在，我正在尝试将标签和imageview合并，以执行其他操作，但是我无法使其正常工作.我已经尝试过针对类似问题的一些解决方案，但它们对我不起作用.

Now I'm trying to merge the label and the imageview in order to do other stuff with that but I 'm not getting it to work. I have tried some solutions given to similar questions but they didn't work for me.

我尝试过

UIGraphicsBeginImageContextWithOptions(_imageView.bounds.size, NO, 0.0); //retina res
[self.imageView.layer renderInContext:UIGraphicsGetCurrentContext()];
[_displaylabel.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

它告诉我接收到的类型例如消息的CAlayer是前向声明".

it tells me that Received type "CAlayer for instance message is a forward declaration".

还有其他建议吗?

推荐答案

 UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"background.png"]];
 UIView *tempView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, imgView.frame.size.width, imgView.frame.size.height)];
    [tempView addSubview:imgView];

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(tempView.frame.size.width/2, 0, 200, tempView.frame.size.height/2)];
[label setText:@"Hello... You there"];
[label setTextColor:[UIColor blackColor]];
[label setTextAlignment:NSTextAlignmentLeft];
[label setBackgroundColor:[UIColor clearColor]];
[tempView addSubview:label];


 UIGraphicsBeginImageContext(tempView.bounds.size);
    [tempView.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *finalImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

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