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POPass UIimage drawing to another viewController
 

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    <p>Im new to the iOS development and searched before posting, but couldn't figure out how to make the image passing work at all in my project. I need to pass the UIimage that the user drew from DrawViewController to the the Draw2viewController.`#import </p> <pre><code>//DrawViewController.h @interface DrawViewController : UIViewController { CGPoint lastPoint; CGFloat red; CGFloat green; CGFloat blue; CGFloat brush; CGFloat opacity; BOOL mouseSwiped; } @property (weak, nonatomic) IBOutlet UIImageView *tempDrawImage; @property (weak, nonatomic) IBOutlet UIImageView *mainImage; - (IBAction)pencilPressed:(id)sender; - (IBAction)eraserPressed:(id)sender; @property (weak, nonatomic) IBOutlet UILabel *Sentence1; @property (weak, nonatomic) IBOutlet UIButton *Done; @end` </code></pre> <p>------------------DrawViewController.m------------------</p> <pre><code>#import "DrawViewController.h" #import "Draw2ViewController.h" #import "SentenceViewController.h" @interface DrawViewController () @end @implementation DrawViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { red = 0.0/255.0; green = 0.0/255.0; blue = 0.0/255.0; brush = 10.0; opacity = 1.0; [super viewDidLoad]; // Do any additional setup after loading the view. Draw2ViewController *view2 = [[Draw2ViewController alloc] init]; view2.myImage = _mainImage; _Sentence1.text = _SentStr; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (IBAction)pencilPressed:(id)sender { UIButton * PressedButton = (UIButton*)sender; switch(PressedButton.tag) { case 0: red = 0.0/255.0; green = 0.0/255.0; blue = 0.0/255.0; break; case 1: red = 105.0/255.0; green = 105.0/255.0; blue = 105.0/255.0; break; case 2: red = 255.0/255.0; green = 0.0/255.0; blue = 0.0/255.0; break; case 3: red = 0.0/255.0; green = 0.0/255.0; blue = 255.0/255.0; break; case 4: red = 102.0/255.0; green = 204.0/255.0; blue = 0.0/255.0; break; case 5: red = 102.0/255.0; green = 255.0/255.0; blue = 0.0/255.0; break; case 6: red = 51.0/255.0; green = 204.0/255.0; blue = 255.0/255.0; break; case 7: red = 160.0/255.0; green = 82.0/255.0; blue = 45.0/255.0; break; case 8: red = 255.0/255.0; green = 102.0/255.0; blue = 0.0/255.0; break; case 9: red = 255.0/255.0; green = 255.0/255.0; blue = 0.0/255.0; break; } } - (IBAction)eraserPressed:(id)sender { red = 255.0/255.0; green = 255.0/255.0; blue = 255.0/255.0; opacity = 1.0; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { mouseSwiped = NO; UITouch *touch = [touches anyObject]; lastPoint = [touch locationInView:self.view]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { mouseSwiped = YES; UITouch *touch = [touches anyObject]; CGPoint currentPoint = [touch locationInView:self.view]; UIGraphicsBeginImageContext(self.view.frame.size); [self.tempDrawImage.image drawInRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y); CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y); CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); CGContextSetLineWidth(UIGraphicsGetCurrentContext(), brush ); CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), red, green, blue, 1.0); CGContextSetBlendMode(UIGraphicsGetCurrentContext(),kCGBlendModeNormal); CGContextStrokePath(UIGraphicsGetCurrentContext()); self.tempDrawImage.image = UIGraphicsGetImageFromCurrentImageContext(); [self.tempDrawImage setAlpha:opacity]; UIGraphicsEndImageContext(); lastPoint = currentPoint; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { if(!mouseSwiped) { UIGraphicsBeginImageContext(self.view.frame.size); [self.tempDrawImage.image drawInRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); CGContextSetLineWidth(UIGraphicsGetCurrentContext(), brush); CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), red, green, blue, opacity); CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y); CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y); CGContextStrokePath(UIGraphicsGetCurrentContext()); CGContextFlush(UIGraphicsGetCurrentContext()); self.tempDrawImage.image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); } UIGraphicsBeginImageContext(self.mainImage.frame.size); [self.mainImage.image drawInRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) blendMode:kCGBlendModeNormal alpha:1.0]; [self.tempDrawImage.image drawInRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) blendMode:kCGBlendModeNormal alpha:opacity]; self.mainImage.image = UIGraphicsGetImageFromCurrentImageContext(); self.tempDrawImage.image = nil; UIGraphicsEndImageContext(); } - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { if ([segue.identifier isEqualToString:@"ImagePass"]) { Draw2ViewController *D2V = [segue destinationViewController]. D2V.myImage = _mainImage; } } @end </code></pre> <p>And Draw2viewController has just been created so there is only the default code in it</p>
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    1. USJordan Twachtmann
    1. USJordan Twachtmann
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    1. CODo you use storyboard to switch from DrawViewController to Draw2viewController view or you create Draw2viewController and present it prog?
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      1. USGreg
    2. COyes, storyboard is used so couldn't i call the parent view controller. (UIImage *) self.parentViewController.mainImage i think…..
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      1. USJordan Twachtmann
    3. COSee prepareForSegue option in my answer.
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