以屏幕截圖並以編程方式發送

Question

當用戶在我的應用程序中點擊按鈕時，我想截取當前視圖並以該屏幕截圖圖像作爲附件打開文本消息。我如何在iOS7中執行此操作？

（我已經看到了如何採取截圖，但不服用的截圖並將其連接到一個消息，什麼職位）

謝謝！

Answer 1

對於採取截圖添加QuartzCore框架，你可以使用UIGraphicsBeginImageContextWithOptions

UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, self.view.opaque, 0.0); 
[self.myView.layer renderInContext:UIGraphicsGetCurrentContext()]; 
UIImage *theImage=UIGraphicsGetImageFromCurrentImageContext(); 
UIGraphicsEndImageContext(); 

NSData *theImageData=UIImageJPEGRepresentation(theImage, 1.0); //you can use PNG too 

2.對於mail這個圖片連接，在構建階段添加MessageUI框架。並使用此NSData用於連接，這樣

//Check if mail can be sent 
if ([MFMailComposeViewController canSendMail]) 
    { 
     MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init]; 
     mailer.mailComposeDelegate = self; 

     // Add NSData you got as screenshot to attachment 
     [mailer addAttachmentData:theImageData mimeType:@"image/jpeg" fileName:[NSString stringWithFormat:@"test.jpg"]]; 
     [self presentModalViewController:mailer animated:YES]; 

    } 

做一些修改：

發送圖像通過短信

// Will Work only for iOS 7 

    MFMessageComposeViewController* messageComposer = [[MFMessageComposeViewController alloc] init]; 
    messageComposer.messageComposeDelegate = self; // As mentioned by the OP in comments, we have to set messageComposeDelegate to self. 
    messageComposer.recipients = [NSArray arrayWithObject:@"123456789"]; 

if([MFMessageComposeViewController canSendText]) 
    { 

    if([MFMessageComposeViewController respondsToSelector:@selector(canSendAttachments)] && [MFMessageComposeViewController canSendAttachments]) 
    { 
     NSString* uti = (NSString*)kUTTypeMessage; 
     [messageComposer addAttachmentData:theImageData typeIdentifier:uti filename:@"filename.jpg"]; 
    } 

    [self presentViewController:messageComposer animated:YES completion:nil]; 
    } 

處理委託的回調從MFMessageComposeViewController

- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result 
{ 

} 

Answer 2

採取的截圖，你可以使用Quartz Display Services方法

你也可以傳遞RECT如

CGRect = [self bounds]; 

然後使用CGDisplayCreateImageForRect

CGImageRef selectedScreenImage; 
selectedScreenImage = CGDisplayCreateImageForRect(kCGDirectMainDisplay, rect); 

將其轉換爲NSData

NSData *data = (NSData *)CFBridgingRelease(CGDataProviderCopyData(CGImageGetDataProvider(selectedScreenImage))); 

創建圖像

安d然後將其附加到使用MFMailComposeViewController

if ([MFMailComposeViewController canSendMail]) 
    { 
     MFMailComposeViewController *cvc = [[MFMailComposeViewController alloc] init]; 
     cvc.mailComposeDelegate = self; 

     [cvc addAttachmentData:data mimeType:@"image/jpeg" fileName:[NSString stringWithFormat:@"YOUR_IMAGE.png"]]; 

     [self presentModalViewController:cvc animated:YES]; 

    } 

Answer 3

要發送MMS

- (UIImage *) imageFromViewIniOS7 
{ 
UIImage* image = nil; 

UIGraphicsBeginImageContext(contentScrollview.contentSize); 
{ 
    CGPoint savedContentOffset = contentScrollview.contentOffset; 
    CGRect savedFrame = contentScrollview.frame; 

    contentScrollview.contentOffset = CGPointZero; 
    contentScrollview.frame = CGRectMake(0, 0, contentScrollview.contentSize.width, contentScrollview.contentSize.height); 
    if ([[NSString versionofiOS] intValue]>=7) 
    { 
     [contentScrollview drawViewHierarchyInRect:contentScrollview.bounds afterScreenUpdates:YES]; 

    } 
    else 
    { 
     [contentScrollview.layer renderInContext: UIGraphicsGetCurrentContext()]; 

    } 
    image = UIGraphicsGetImageFromCurrentImageContext(); 

    contentScrollview.contentOffset = savedContentOffset; 
    contentScrollview.frame = savedFrame; 
} 
UIGraphicsEndImageContext(); 


return image; 
} 
-(void)buttonAction 
{ 
MFMessageComposeViewController *picker = [[MFMessageComposeViewController alloc] init]; 
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard]; 
pasteboard.persistent = YES; 
pasteboard.image = [self imageFromViewIniOS7]; 

NSString *phoneToCall = @"sms:"; 
NSString *phoneToCallEncoded = [phoneToCall stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]; 
NSURL *url = [[NSURL alloc] initWithString:phoneToCallEncoded]; 
[[UIApplication sharedApplication] openURL:url];  

if([MFMessageComposeViewController canSendText]) { 
NSMutableString *emailBody = [[NSMutableString alloc] initWithString:@"Your Email Body"]; 
picker.messageComposeDelegate = self; 
picker.recipients = [NSArray arrayWithObject:@"123456789"]; 
[picker setBody:emailBody];// your recipient number or self for testing 
picker.body = emailBody; 
NSLog(@"Picker -- %@",picker.body); 
[self presentModalViewController:picker animated:YES]; 
NSLog(@"SMS fired"); 
} 
}