macos - osx 上的屏幕截图

Question

<分区>

Answer 1

这是一个示例代码，用于捕获屏幕并将其保存为对我有用的文件。

/**
    Record the current screen to the destination path mentioned.
 **/

-(void)screenRecording:(NSURL *)destPath {
    
    //Create capture session
    mSession = [[AVCaptureSession alloc] init];
    
    //Set session preset
    //mSession.sessionPreset = AVCaptureSessionPresetMedium;
    mSession.sessionPreset = AVCaptureSessionPreset1280x720;
    
    //Specify display to be captured
    CGDirectDisplayID displayId = kCGDirectMainDisplay;
    
    //Create AVCaptureScreenInput with the display id
    AVCaptureScreenInput *input = [[AVCaptureScreenInput alloc] initWithDisplayID:displayId];
    if(!input) {
        //if input is null
        return;
    }
    
    //if input is not null and can be added to the session
    if([mSession canAddInput:input]) {
        //Add capture screen input to the session
        [mSession addInput:input];
    }
    
    //Create AVCaptureMovieFileOutput
    mMovieFileOutput = [[AVCaptureMovieFileOutput alloc] init];
    mMovieFileOutput.delegate = self;
    
    if([mSession canAddOutput:mMovieFileOutput]) {
        //If movie file output can be added to session, then add it the session
        [mSession addOutput:mMovieFileOutput];
    }
    
    //Start running the session
    [mSession startRunning];
    
    //Check whether the movie file exists already
    if([[NSFileManager defaultManager] fileExistsAtPath:[destPath path]]) {
        NSError *err;
        //If the movie file exists already, then delete it
        if(![[NSFileManager defaultManager] removeItemAtPath:[destPath path] error:&err]) {
            NSLog(@"Error deleting existing movie file %@", [err localizedDescription]);
        }
    }
    
    //Start recording to destination path using the AVCaptureMovieFileOutput
    [mMovieFileOutput startRecordingToOutputFileURL:destPath recordingDelegate:self];
    
}

您可以在 http://developer.apple.com/library/mac/#qa/qa1740/_index.html 找到示例代码

请通过网址。这至少可以帮助您创建捕获屏幕的基本应用程序。