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主要代碼

UIView+Cutter.m

/**
 *  根據(jù)視圖尺寸獲取視圖截屏
 *
 *  @return UIImage 截取的圖片
 */
- (UIImage*)viewCutter
{
    UIGraphicsBeginImageContextWithOptions(self.bounds.size,NO,[[UIScreen mainScreen] scale]);
    
    // 方法一 有時(shí)導(dǎo)航條無法正常獲取
    // [self.layer renderInContext:UIGraphicsGetCurrentContext()];
    // 方法二 iOS7.0 后推薦使用
     [self drawViewHierarchyInRect:self.bounds afterScreenUpdates:YES];
    
    UIImage*img = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return img;
}

UIScrollView+Cutter.m

/**
 *  根據(jù)視圖尺寸獲取視圖截屏（一屏無法顯示完整）,適用于UIScrollView UITableviewView UICollectionView UIWebView
 *
 *  @return UIImage 截取的圖片
 */
- (UIImage *)scrollViewCutter
{
    //保存
    CGPoint savedContentOffset = self.contentOffset;
    CGRect savedFrame = self.frame;
    
    self.contentOffset = CGPointZero;
    self.frame = CGRectMake(0, 0, self.contentSize.width, self.contentSize.height);
    
    UIImage *image = [self viewCutter];
    
    //還原數(shù)據(jù)
    self.contentOffset = savedContentOffset;
    self.frame = savedFrame;
    
    return image;
    
    
}

代碼示例

/*

// 使用說明

// 沒有導(dǎo)航和tabbar
UIImage *image = [self.view viewCutter];

// 有導(dǎo)航和tabbar
UIImage *image = [self.navigationController.view viewCutter];

// UICollectionView
UIImage *image = [self.collectionView scrollViewCutter];

// UITableView
UIImage *image = [self.tableView scrollViewCutter];

// UIWebView
UIImage *image = [self.webView scrollViewCutter];

*/

圖片示例：

Cutter-1

Cutter-2

Cutter-3

完整代碼下載

參考

https://developer.apple.com/library/ios/qa/qa1817/_index.html#//apple_ref/doc/uid/DTS40014134