UITextView轉UIImage

//TextView轉image
-(UIImage*) saveTextView
{
    
    //1.設置大小
    CGSize size  = _maskText.size;//
    _rect=_maskText.frame;
    
    
  
    if (UIGraphicsBeginImageContextWithOptions != NULL)
        UIGraphicsBeginImageContextWithOptions(size,NO,0);

    
    // draw in context, you can use  drawInRect/drawAtPoint:withFont:
  
    // 2.設置text屬性
    NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
   
    paragraphStyle.alignment = NSTextAlignmentCenter;
    
    NSShadow *shadow=[[NSShadow alloc]init];
    shadow.shadowBlurRadius=2;//模糊度
    shadow.shadowColor=[UIColor blackColor];
    shadow.shadowOffset=CGSizeMake(1, 1);

    //設置文字屬性

    //此處具體設置根據個人情況添加,具體設置請看iOS- 詳解文本屬性Attributes 

    NSDictionary *dict=@{NSFontAttributeName:_maskText.font,NSForegroundColorAttributeName:[UIColor whiteColor],NSParagraphStyleAttributeName:paragraphStyle,NSShadowAttributeName:shadow,NSVerticalGlyphFormAttributeName:@(0)};
    //NSStrokeColorAttributeName:[UIColor blackColor],NSStrokeWidthAttributeName:@0.5
    
    [_maskText.text drawInRect:CGRectMake(0, 0, size.width, size.height) withAttributes:dict];
    
    
    //3. 轉換爲圖片
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    _angle=0;
    return image;


}