将UITextView转换为图像

Question

我有一个UIExtView和一个UIImageView，我想把它们转换成一个单独的图像来共享。

SaveImageView是ImageView，我想在这里保存textview的图像。

Textview可以在屏幕上移动它，所以我决定保存它们的最终位置，并将其交给SaveImageView。

首先转换图像中的UItext View并保存他的位置。

然后，我想加入两个Imageview，成一个单一的图像。

self.SaveTextView.frame = self.textView.frame;


UIGraphicsBeginImageContext (self.textView.bounds.size);

[self.textView.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();


self.SaveTextView.image=resultingImage;

//连接两个uiimageview

UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, 0.0);

[self.BaseImageView.image drawInRect:CGRectMake(0, 0, self.BaseImageView.frame.size.width, self.BaseImageView.frame.size.height)];

[self.SaveTextView.image drawInRect:CGRectMake(self.SaveTextView.frame.origin.x, self.SaveTextView.frame.origin.y, self.SaveTextView.frame.size.width, self.SaveTextView.frame.size.height)];


_SaveImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

问题是，我在文本视图中写的地方不在保存图像的同一位置，图像与文本稍微移动，当它应该是我已经写过的确切位置时，没有找到哪里是错误的。

任何帮助？？

Answer 1

试试这个。。。

//Make Label
UILabel *_labelTimeOutName = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 428, 32)];
_labelTimeOutName.text = @"Your label text here";
_labelTimeOutName.minimumScaleFactor = 0.5;
_labelTimeOutName.numberOfLines = 1;
_labelTimeOutName.textColor = [UIColor whiteColor];
_labelTimeOutName.backgroundColor = [UIColor clearColor];
_labelTimeOutName.font  = [UIFont fontWithName:@"TrebuchetMS-Bold" size:24];
_labelTimeOutName.textAlignment = NSTextAlignmentCenter;

//add label inside a temp View
UIView *tempView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 428, 32)];
tempView.backgroundColor = [UIColor clearColor];
[tempView addSubview:_labelTimeOutName];

//render image
//CGContextRef context = UIGraphicsGetCurrentContext();
UIGraphicsBeginImageContextWithOptions(tempView.bounds.size, tempView.opaque, 0.0);
// The view to be rendered
[[tempView layer] renderInContext:UIGraphicsGetCurrentContext() ]; //context];
// Get the rendered image
//////////////////////////////////////////////////////////////////////
UIImage *FinalTextIamge = UIGraphicsGetImageFromCurrentImageContext();
//////////////////////////////////////////////////////////////////////
UIGraphicsEndImageContext();

享受吧！

Answer 2

尝试实现此方法并在Superview上调用它：

@implementation UIView (ScreenShot)

- (UIImage *)screenShot
{
  UIGraphicsBeginImageContextWithOptions(self.bounds.size, self.opaque, 0.0);
  [self.layer renderInContext:UIGraphicsGetCurrentContext()];
  UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();

  return image;
}

@end