iOS中的截屏（屏幕截屏及scrollView或tableView的全部截屏）
2017.03.16 12:18* 字數 52 閱讀 563評論 4喜歡 2
1. 截取屏幕尺寸大小的圖片並保存至相冊
保存至相冊只需將方法saveImage中的代碼替換即可
UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, YES, 0.0);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
2. scrollView或tableView的全部截屏並保存至相冊
- (void)saveImage {
UIImage* viewImage = nil;
UITableView *scrollView = self.tableView;
UIGraphicsBeginImageContextWithOptions(scrollView.contentSize, scrollView.opaque, 0.0);
{
CGPoint savedContentOffset = scrollView.contentOffset;
CGRect savedFrame = scrollView.frame;
scrollView.contentOffset = CGPointZero;
scrollView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height);
[scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];
viewImage = UIGraphicsGetImageFromCurrentImageContext();
scrollView.contentOffset = savedContentOffset;
scrollView.frame = savedFrame;
}
UIGraphicsEndImageContext();
[self saveImageToPhotos:viewImage];
}
- (void)saveImageToPhotos:(UIImage*)savedImage {
UIImageWriteToSavedPhotosAlbum(savedImage, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);
}
- (void)image: (UIImage *) image didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo {
NSString *msg = nil ;
if(error != NULL){
msg = @"保存圖片失敗" ;
}else{
msg = @"保存圖片成功" ;
}
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"保存圖片結果提示"
message:msg
delegate:self
cancelButtonTitle:@"確定"
otherButtonTitles:nil];
[alert show];
}
+ (UIImage *)screenshot { CGSize imageSize = CGSizeZero; UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation; if (UIInterfaceOrientationIsPortrait(orientation)) { imageSize = [UIScreen mainScreen].bounds.size; } else { imageSize = CGSizeMake([UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width); } UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0); CGContextRef context = UIGraphicsGetCurrentContext(); for (UIWindow *window in [[UIApplication sharedApplication] windows]) { CGContextSaveGState(context); CGContextTranslateCTM(context, window.center.x, window.center.y); CGContextConcatCTM(context, window.transform); CGContextTranslateCTM(context, -window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height * window.layer.anchorPoint.y); if (orientation == UIInterfaceOrientationLandscapeLeft) { CGContextRotateCTM(context, M_PI_2); CGContextTranslateCTM(context, 0, -imageSize.width); } else if (orientation == UIInterfaceOrientationLandscapeRight) { CGContextRotateCTM(context, -M_PI_2); CGContextTranslateCTM(context, -imageSize.height, 0); } else if (orientation == UIInterfaceOrientationPortraitUpsideDown) { CGContextRotateCTM(context, M_PI); CGContextTranslateCTM(context, -imageSize.width, -imageSize.height); } if ([window respondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)]) { [window drawViewHierarchyInRect:window.bounds afterScreenUpdates:YES]; } else { [window.layer renderInContext:context]; } CGContextRestoreGState(context); } UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return image; } swift
class func screenshot() -> UIImage { var imageSize = CGSizeZero let orientation = UIApplication.sharedApplication().statusBarOrientation if UIInterfaceOrientationIsPortrait(orientation) { imageSize = UIScreen.mainScreen().bounds.size } else { imageSize = CGSize(width: UIScreen.mainScreen().bounds.size.height, height: UIScreen.mainScreen().bounds.size.width) } UIGraphicsBeginImageContextWithOptions(imageSize, false, 0) let context = UIGraphicsGetCurrentContext() for window in UIApplication.sharedApplication().windows { CGContextSaveGState(context) CGContextTranslateCTM(context, window.center.x, window.center.y) CGContextConcatCTM(context, window.transform) CGContextTranslateCTM(context, -window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height * window.layer.anchorPoint.y) if orientation == .LandscapeLeft { CGContextRotateCTM(context, CGFloat(M_PI_2)) CGContextTranslateCTM(context, 0, -imageSize.width) } else if orientation == .LandscapeRight { CGContextRotateCTM(context, -CGFloat(M_PI_2)) CGContextTranslateCTM(context, -imageSize.height, 0) } else if orientation == .PortraitUpsideDown { CGContextRotateCTM(context, CGFloat(M_PI)) CGContextTranslateCTM(context, -imageSize.width, -imageSize.height) } if window.respondsToSelector("drawViewHierarchyInRect:afterScreenUpdates:") { window.drawViewHierarchyInRect(window.bounds, afterScreenUpdates: true) } else if let context = context { window.layer.renderInContext(context) } CGContextRestoreGState(context) } let image = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return image }鏈接：https://www.jianshu.com/p/343387a9e5c0
iOS應用內截圖代碼
有待改寫工具類？？？？？
2016.06.17
第一種方法（截全屏幕）
下面這段代碼可以將當前屏幕顯示的內容截圖放置相冊中，需要導入
-(void)viewDidAppear:(BOOL)animated
{
[superviewDidAppear:animated];
self.view.backgroundColor= [UIColorgreenColor];
UIWindow*screenWindow = [[UIApplicationsharedApplication]keyWindow];
UIGraphicsBeginImageContext(screenWindow.frame.size);
[screenWindow.layerrenderInContext:UIGraphicsGetCurrentContext()];
UIImage* viewImage =UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
UIImageWriteToSavedPhotosAlbum(viewImage,nil,nil,nil);
}
第二種方法（自定義截圖區域）
#pragmamark -=====自定義截屏位置大小的邏輯代碼=====-
staticintScreenshotIndex=0; //
-(void)ScreenShot{
//這里因為我需要全屏接圖所以直接改了，宏定義iPadWithd為1024，iPadHeight為768，
//UIGraphicsBeginImageContextWithOptions(CGSizeMake(640, 960), YES, 0);//設置截屏大小
UIGraphicsBeginImageContextWithOptions(CGSizeMake(iPadWidth, iPadHeight), YES,0);//設置截屏大小
[[self.view layer] renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage =UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRef imageRef =viewImage.CGImage;
//CGRect rect = CGRectMake(166, 211, 426, 320);//這里可以設置想要截圖的區域
CGRect rect = CGRectMake(0,0, iPadWidth, iPadHeight);//這里可以設置想要截圖的區域
CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect);
UIImage *sendImage =[[UIImage alloc] initWithCGImage:imageRefRect];
UIImageWriteToSavedPhotosAlbum(sendImage, nil, nil, nil);//保存圖片到照片庫
NSData *imageViewData =UIImagePNGRepresentation(sendImage);
NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *pictureName= [NSString stringWithFormat:@"screenShow_%d.png",ScreenshotIndex];
NSString *savedImagePath =[documentsDirectory stringByAppendingPathComponent:pictureName];
NSLog(@"截屏路徑打印: %@", savedImagePath);
//這里我將路徑設置為一個全局String，這里做的不好，我自己是為了用而已，希望大家別這么寫
[self SetPickPath:savedImagePath];
[imageViewData writeToFile:savedImagePath atomically:YES];//保存照片到沙盒目錄
CGImageRelease(imageRefRect);
ScreenshotIndex++;
}
//設置路徑
- (void)SetPickPath:(NSString *)PickImage {
_ScreenshotsPickPath =PickImage;
}
//獲取路徑<這里我就直接用於郵件推送的代碼中去了，能達到效果，但肯定有更好的寫法>
- (NSString *)GetPickPath {
return_ScreenshotsPickPath;
}
IOS獲取設備屏幕代碼（截屏）
-(void) screenShot{
UIGraphicsBeginImageContext(self.bounds.size); //self為需要截屏的UI控件 即通過改變此參數可以截取特定的UI控件
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image= UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSLog(@"image:%@",image); //至此已拿到image
UIImageView *imaView = [[UIImageView alloc] initWithImage:image];
imaView.frame = CGRectMake(0, 700, 500, 500);
[self addSubview:imaView];
UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);//把圖片保存在本地
}