iOS上にタッチで線を描くSDKはありますか？

Question

タッチで線を引くために使用できるフレームワークはありますか？基本的には、顧客がiPad/iPhoneにサインインして画像としてキャプチャする機能を追加したいと考えています。

ご迷惑をおかけして申し訳ございません。

ありがとうございました。

Answer 1

あなたはUIKITフレームワークで利用可能なコアグラフィックスを使用して要件を満たすことができます。

私は別の用途で私のアプリケーションで同様の要件を持っていました。必要であれば私はあなたにコードを提供することができます。

TNQ

.hファイル

#import <UIKit/UIKit.h> 
typedef enum _DrawingMode{ 
DrawingModePen =0, 
DrawingModeEraser=1, 
} DrawingMode; 
@interface DrawingView : UIView { 
CGPoint lastPoint; 
UIImageView *drawImage; 
BOOL mouseSwiped; 
int mouseMoved; 
DrawingMode mode; 
UIColor *_drawingPenColor; 
} 
@property (nonatomic, retain) UIColor *drawingPenColor; 
@property (nonatomic) DrawingMode mode; 

@property (nonatomic, retain) UIImageView *imageView; 
@property (nonatomic,retain)UIImageView *drawImage; 
@end 

.M

#import "DrawingView.h" 


@implementation DrawingView 

@synthesize mode, drawingPenColor=_drawingPenColor, imageView=drawImage; 


-(void)initialize{ 
    drawImage = [[UIImageView alloc] initWithImage:nil]; 
    self.autoresizesSubviews = YES; 
    drawImage.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight); 
    drawImage.frame = self.bounds; 
    [self addSubview:drawImage]; 
    self.backgroundColor = [UIColor clearColor]; 
    mouseMoved = 0; 
    _drawingPenColor = [[UIColor alloc] initWithWhite:0.0 alpha:1.0]; 
} 

-(void)maskImage:(UIImage *)image withMask:(UIImage *)maskImage 
{ 
    CGImageRef maskRef = maskImage.CGImage; 
    CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef), 
             CGImageGetHeight(maskRef), 
             CGImageGetBitsPerComponent(maskRef), 
             CGImageGetBitsPerPixel(maskRef), 
             CGImageGetBytesPerRow(maskRef), 
             CGImageGetDataProvider(maskRef), NULL, false); 
    CGImageRef masked = CGImageCreateWithMask([image CGImage], mask); 
    UIImage *tempImage = [[UIImage alloc] initWithCGImage:masked]; 
    //self.clippedImage = tempImage; 
    [tempImage release]; 
    CFRelease(masked); 
    CFRelease(mask); 
} 

-(void)awakeFromNib{ 
    [self initialize]; 
} 

- (id)initWithFrame:(CGRect)frame { 
    if ((self = [super initWithFrame:frame])) { 
     // Initialization code 
     [self initialize]; 
    } 
    return self; 
} 

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { 

    mouseSwiped = NO; 
    UITouch *touch = [touches anyObject]; 

    if ([touch tapCount] == 2) { 
     drawImage.image = nil; 
     return; 
    } 

    lastPoint = [touch locationInView:self]; 
    //lastPoint.y -= 20; 
    NSLog(@"touches begin"); 

} 

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { 
    mouseSwiped = YES; 

    UITouch *touch = [touches anyObject]; 
    CGPoint currentPoint = [touch locationInView:self]; 
    //currentPoint.y -= 20; 


    UIGraphicsBeginImageContext(self.bounds.size); 
    [drawImage.image drawInRect:CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height)]; 
    CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); 
    CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 5.0); 
    if (mode == DrawingModePen) { 
     NSLog(@"drawing"); 
     CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), [_drawingPenColor CGColor]); 
    } 
    else { 
     CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), [[UIColor clearColor] CGColor]); 

     CGContextBeginPath(UIGraphicsGetCurrentContext()); 


     CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y); 
     CGContextClearRect (UIGraphicsGetCurrentContext(), CGRectMake(lastPoint.x, lastPoint.y, 20, 20)); 
     CGContextStrokePath(UIGraphicsGetCurrentContext()); 

     NSLog(@"clearing"); 
      } 
    CGContextBeginPath(UIGraphicsGetCurrentContext()); 
    CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y); 
    CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y); 
    CGContextStrokePath(UIGraphicsGetCurrentContext()); 
    drawImage.image = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 

    lastPoint = currentPoint; 

    mouseMoved++; 

    if (mouseMoved == 10) { 
     mouseMoved = 0; 
    } 

} 

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { 

    UITouch *touch = [touches anyObject]; 

    if ([touch tapCount] == 2) { 
     drawImage.image = nil; 
     return; 
    } 


    if(!mouseSwiped) { 
     UIGraphicsBeginImageContext(self.bounds.size); 
     [drawImage.image drawInRect:CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height)]; 
     CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); 
     CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 5.0); 
     CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y); 
     CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y); 
     if (mode == DrawingModePen) { 
      CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), [_drawingPenColor CGColor]); 
     } 
     else { 
      CGContextSetStrokeColorWithColor(UIGraphicsGetCurrentContext(), [self.backgroundColor CGColor]); 
     } 
     CGContextStrokePath(UIGraphicsGetCurrentContext()); 
     CGContextFlush(UIGraphicsGetCurrentContext()); 
     drawImage.image = UIGraphicsGetImageFromCurrentImageContext(); 
     UIGraphicsEndImageContext(); 
    } 
} 

- (void)dealloc { 
    [drawImage release]; 
    [_drawingPenColor release]; 
    [super dealloc]; 
} 

@end 

Answer 2

あなたはhttp://www.cdframeworks.com/product/brushengine

BrushEngineで見つけることができますBrushEngineと呼ばれるフレームワークが用意されましたが、あなたがして描くことができます線、シェイプ（さまざまなビルトイン）、カスタムピクチャ、および他の多くの。その後、出力を画像またはビデオとして保存することができます。