嗨，我正在开发一个 iPad 应用程序，该应用程序需要自动截取屏幕截图，并且图像应该以屏幕名称的名称保存，并带有设备中的当前日期和当前时间。有人帮我做这件事。
我尝试了以下代码。在该代码中截取了屏幕截图，我将在该视图的标签中打印名称。但是标签中的时间不准确，所以我想以附加时间的屏幕名称的名称保存图像。
//-- Screen Capture --------------------------------------------------------------------//
UIImage *image = nil;
UIGraphicsBeginImageContext(loginBgImgVw.frame.size);
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"MM-dd-yyyy HH:MM:SS"];
[formatter setTimeZone:[NSTimeZone localTimeZone]];
NSString *dateToday = [formatter stringFromDate:[NSDate date]];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100, 0, 600, 44)];
[label setText:dateToday];
NSString *fileNameStr = [NSString stringWithFormat:@"%@_Login_%@",providerIdStr,dateToday];
[label setText:fileNameStr];
label.backgroundColor = [UIColor clearColor];
[loginBgImgVw addSubview:label];
[formatter release];
[loginBgImgVw.layer renderInContext: UIGraphicsGetCurrentContext()];
image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
//=--
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docspath = [paths objectAtIndex:0];
NSLog(@"path=--%@",paths);
NSString *dataPath = [docspath stringByAppendingPathComponent:[NSString stringWithFormat:@"ProviderID_%@",providerIdStr]];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
{
[[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:nil];
}
NSString *savedImagePath = [dataPath stringByAppendingPathComponent:@"Login_Provider.png"];
NSData *imageData = UIImageJPEGRepresentation(image, 0.2);
[imageData writeToFile:savedImagePath atomically:NO];
UIImageWriteToSavedPhotosAlbum(image,self,@selector(image:didFinishSavingWithError:contextInfo:),NULL);
//--------------------------------------------------------------------------------------//