關於iPhone/iPad全屏截圖與區域截圖的幾種方法總結

截取本區域(self.view):

UIGraphicsBeginImageContext(CGSizeMake(self.view.frame.size.width, self.view.frame.size.height));
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
全屏截圖:

UIWindow *screenWindow = [[UIApplication sharedApplication] keyWindow];
    UIGraphicsBeginImageContext(screenWindow.frame.size);
    [screenWindow.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
以上2種方法真機和模擬器都可以運行.在photo.app裏可以看到照片

蘋果最新開放的接口函數(全屏截圖),已經有人試過了,不會reject:

CGImageRef UIGetScreenImage(); 
    CGImageRef img = UIGetScreenImage();
    UIImage* scImage=[UIImage imageWithCGImage:img];
    UIImageWriteToSavedPhotosAlbum(scImage, nil, nil, nil);
It still works,but only on-device (not in simulator) .

截圖另存爲指定名字:

UIWindow *screenWindow = [[UIApplication sharedApplication] keyWindow];

UIGraphicsBeginImageContext(screenWindow.frame.size);
[screenWindow.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

NSData *screenshotPNG = UIImagePNGRepresentation(screenshot);

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];

NSError *error = nil;
[screenshotPNG writeToFile:[documentsDirectory stringByAppendingPathComponent:@"screenshot.png"] options:NSAtomicWrite error:&error];
部分代碼來自:http://stackoverflow.com/questions/692464/emailing-full-screen-of-iphone-app

沒有ipad真機截圖發佈app的可以用此方法做個透明按鈕點,哈哈.
截取本區域(self.view):

UIGraphicsBeginImageContext(CGSizeMake(self.view.frame.size.width, self.view.frame.size.height));
    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
全屏截圖:

UIWindow *screenWindow = [[UIApplication sharedApplication] keyWindow];
    UIGraphicsBeginImageContext(screenWindow.frame.size);
    [screenWindow.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
以上2種方法真機和模擬器都可以運行.在photo.app裏可以看到照片

蘋果最新開放的接口函數(全屏截圖),已經有人試過了,不會reject:

CGImageRef UIGetScreenImage(); 
    CGImageRef img = UIGetScreenImage();
    UIImage* scImage=[UIImage imageWithCGImage:img];
    UIImageWriteToSavedPhotosAlbum(scImage, nil, nil, nil);
It still works,but only on-device (not in simulator) .

截圖另存爲指定名字:

UIWindow *screenWindow = [[UIApplication sharedApplication] keyWindow];

UIGraphicsBeginImageContext(screenWindow.frame.size);
[screenWindow.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

NSData *screenshotPNG = UIImagePNGRepresentation(screenshot);

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];

NSError *error = nil;
[screenshotPNG writeToFile:[documentsDirectory stringByAppendingPathComponent:@"screenshot.png"] options:NSAtomicWrite error:&error];
部分代碼來自:http://stackoverflow.com/questions/692464/emailing-full-screen-of-iphone-app