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POIos 6 drawing app keeps stretching after strokes are made
 

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  1. POIos 6 drawing app keeps stretching after strokes are made
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    <p>Im currently making a drawing app, which I'm using a story board so i can implement a game with it was well. The drawingViewController's UIimageViewer only takes up about 3/4s of the screen, because the other 1/4 is used to keep buttons on and a sentence. However, every time I draw a line the image then gets stretched along the y-axis. My question is is there anything I can do to make it no longer stretch at all. Or would it be better if i make the UIimageViewer take up the whole screen and put the buttons over the top of that? I will also need to add a label and text box over the top of the UIimageview? Im pretty new with programming on iOS 6 so any help would be greatly appreciated. </p> <pre><code>#import "DrawViewController.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. } - (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(); } @end </code></pre>
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