iOS Quartz 획 색상 변경

Question

저는 iOS를 처음 사용하며 학습 경험으로 이것을하고 있습니다. 나는이 코드의 대부분을 튜토리얼과 그 작업에서 얻었지만 스트로크 색상을 더 추가하고 싶다. 내 코드는 UIColor greenColor에서 기본 획으로 시작하지만 눌렀을 때 획 색상을 빨강 또는 파랑으로 변경해야하는 "빨강"및 "파랑"이라는 두 개의 버튼이 있습니다. 빨간색을 누른 다음 그리기를 시작하고 그 그림이 MS 페인트와 같이 빨간색으로 나오게하고 싶습니다. 내 UIButtons 제대로 연결되어 있는지 확인했습니다. 어떤 도움을 주셔서 감사합니다, 감사합니다!

DrawView.h :

#import <UIKit/UIKit.h> 
@interface DrawView : UIImageView 
- (void)changeOption:(NSString *)withOption; 
@end 

DrawView.m : 다른 코드에서

#import "DrawView.h" 
@interface DrawView() 
@property (nonatomic) BOOL fingerMoved; 
@property (nonatomic) CGPoint lastPoint; 
@end 

@implementation DrawView 

CGFloat red = 0.0, green = 0.0, blue = 0.0, width = 5.0; 
@synthesize fingerMoved = _fingerMoved; 
@synthesize lastPoint = _lastPoint; 

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

- (void)changeOption:(NSString *)withOption 
{ 
    if ([withOption isEqualToString:@"Black"]) { 
     red = 0.0; green = 0.0; blue = 0.0; width = 5.0; 
    }else if ([withOption isEqualToString:@"Red"]) { 
     red = 1.0; green = 0.0; blue = 0.0; width = 5.0; 
    }else if ([withOption isEqualToString:@"Blue"]) { 
     red = 0.0; green = 0.0; blue = 1.0; width = 5.0; 
    }else if ([withOption isEqualToString:@"Green"]) { 
     red = 0.0; green = 1.0; blue = 0.0; width = 5.0; 
    }else if ([withOption isEqualToString:@"Brown"]) { 
     red = 0.4; green = 0.0; blue = 0.0; width = 5.0; 
    }else if ([withOption isEqualToString:@"Orange"]) { 
     red = 1.0; green = 0.6; blue = 0.0; width = 5.0; 
    }else if ([withOption isEqualToString:@"Yellow"]) { 
     red = 1.0; green = 1.0; blue = 0.0; width = 5.0; 
    }else if ([withOption isEqualToString:@"Purple"]) { 
     red = 0.5; green = 0.0; blue = 1.0; width = 5.0; 
    }else if ([withOption isEqualToString:@"Eraser"]) { 
     red = 1.0; green = 1.0; blue = 1.0; width = 13.0; 
    }else if ([withOption isEqualToString:@"Clear"]) { 
     self.image = nil; 
    } 
} 

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    self.fingerMoved = NO; 
    UITouch *touch = [touches anyObject]; 
    if ([touch tapCount] == 2) { 
     self.image = nil; 
     return; 
    } 

    self.lastPoint = [touch locationInView:self]; 
    self.lastPoint = CGPointMake(self.lastPoint.x, self.lastPoint.y - 20); 
} 

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    self.fingerMoved = YES; 
    UITouch *touch = [touches anyObject]; 
    CGPoint currentPoint = [touch locationInView:self]; 
    currentPoint.y -= 20; 

    UIGraphicsBeginImageContext(self.frame.size); 
    [self.image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)]; 
    CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); 
    CGContextSetLineWidth(UIGraphicsGetCurrentContext(), width); 
    CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), red, green, blue, 1.0); 
    CGContextMoveToPoint(UIGraphicsGetCurrentContext(), self.lastPoint.x, self.lastPoint.y); 
    CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y); 
    CGContextStrokePath(UIGraphicsGetCurrentContext()); 
    self.image = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    self.lastPoint = currentPoint; 
} 

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    UITouch *touch = [touches anyObject]; 
    if ([touch tapCount] == 2) { 
     self.image = nil; 
     return; 
    } 

    if (!self.fingerMoved) { 
     UIGraphicsBeginImageContext(self.frame.size); 
     [self.image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)]; 
     CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); 
     CGContextSetLineWidth(UIGraphicsGetCurrentContext(), width); 
     CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), red, green, blue, 1.0); 
     CGContextMoveToPoint(UIGraphicsGetCurrentContext(), self.lastPoint.x, self.lastPoint.y); 
     CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), self.lastPoint.x, self.lastPoint.y); 
     CGContextStrokePath(UIGraphicsGetCurrentContext()); 
     self.image = UIGraphicsGetImageFromCurrentImageContext(); 
     UIGraphicsEndImageContext(); 
    } 
} 

/* 
// Only override drawRect: if you perform custom drawing. 
// An empty implementation adversely affects performance during animation. 
- (void)drawRect:(CGRect)rect 
{ 
    // Drawing code 
} 
*/ 

@end 

Answer 1

어리석은 실수. 이제 해결되었습니다.