जांच से ऊपर घटक के पूरी तरह कार्यात्मक संस्करण के लिए नीचे दिए गए कोड, अपने काम के (अपने बिट गंदा हो सकता है)।
#import "UIArcSlider.h"
@interface UIArcSlider()
@property (nonatomic) CGPoint thumbCenterPoint;
#pragma mark - Init and Setup methods
- (void)setup;
#pragma mark - Thumb management methods
- (BOOL)isPointInThumb:(CGPoint)point;
#pragma mark - Drawing methods
- (CGFloat)sliderRadius;
- (void)drawThumbAtPoint:(CGPoint)sliderButtonCenterPoint inContext:(CGContextRef)context;
- (CGPoint)drawTheArcTrack:(float)track atPoint:(CGPoint)center withRadius:(CGFloat)radius AndColor:(Boolean) isWhite inContext:(CGContextRef)context;
- (CGPoint)drawTheLineTrack:(float)track withColor:(Boolean) isWhite inContext:(CGContextRef)context;
@end
#pragma mark -
@implementation UIArcSlider
@synthesize sliderStyle = _sliderStyle;
- (void)setSliderStyle:(UISliderStyle)sliderStyle {
if (sliderStyle != _sliderStyle) {
_sliderStyle = sliderStyle;
[self setNeedsDisplay];
}
}
@synthesize value = _value;
- (void)setValue:(float)value {
if (value != _value) {
if (value > self.maximumValue) { value = self.maximumValue; }
if (value < self.minimumValue) { value = self.minimumValue; }
_value = value;
[self setNeedsDisplay];
[self sendActionsForControlEvents:UIControlEventValueChanged];
}
}
@synthesize minimumValue = _minimumValue;
- (void)setMinimumValue:(float)minimumValue {
if (minimumValue != _minimumValue) {
_minimumValue = minimumValue;
if (self.maximumValue < self.minimumValue) { self.maximumValue = self.minimumValue; }
if (self.value < self.minimumValue) { self.value = self.minimumValue; }
}
}
@synthesize maximumValue = _maximumValue;
- (void)setMaximumValue:(float)maximumValue {
if (maximumValue != _maximumValue) {
_maximumValue = maximumValue;
if (self.minimumValue > self.maximumValue) { self.minimumValue = self.maximumValue; }
if (self.value > self.maximumValue) { self.value = self.maximumValue; }
}
}
@synthesize thumbCenterPoint = _thumbCenterPoint;
/** @name Init and Setup methods */
#pragma mark - Init and Setup methods
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self setup];
}
return self;
}
- (void)awakeFromNib {
[self setup];
}
- (void)setup {
self.value = 0.0;
self.minimumValue = 0.0;
self.maximumValue = 100.0;
self.thumbCenterPoint = CGPointZero;
UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGestureHappened:)];
[self addGestureRecognizer:tapGestureRecognizer];
UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGestureHappened:)];
panGestureRecognizer.maximumNumberOfTouches = panGestureRecognizer.minimumNumberOfTouches;
[self addGestureRecognizer:panGestureRecognizer];
}
/** @name Drawing methods */
#pragma mark - Drawing methods
#define kLineWidth 22.0
#define kThumbRadius 20.0
#define kPadding 20.0
- (CGFloat)sliderRadius {
CGFloat radius = self.bounds.size.width;
radius -= MAX(kLineWidth + kPadding, kThumbRadius + kPadding);
return radius;
}
-(CGFloat)sliderWidth {
return self.bounds.size.width - kThumbRadius*2;
}
- (void)drawThumbAtPoint:(CGPoint)sliderButtonCenterPoint inContext:(CGContextRef)context {
UIGraphicsPushContext(context);
CGContextBeginPath(context);
CGContextMoveToPoint(context, sliderButtonCenterPoint.x, sliderButtonCenterPoint.y);
CGRect rect = CGRectMake(sliderButtonCenterPoint.x - kThumbRadius, sliderButtonCenterPoint.y - kThumbRadius, kThumbRadius*2, kThumbRadius*2);
CGImageRef imageRef = [UIImage imageNamed:@"circle25.png"].CGImage;
CGContextDrawImage(context, rect, imageRef);
UIGraphicsPopContext();
}
- (CGPoint)drawTheArcTrack:(float)track atPoint:(CGPoint)center withRadius:(CGFloat)radius AndColor:(Boolean) isWhite inContext:(CGContextRef)context
{
static CGFloat const kArcThickness = kLineWidth;
CGPoint arcCenter = center;
CGFloat arcRadius = radius;
float angleFromTrack = translateValueFromSourceIntervalToDestinationInterval(track, self.minimumValue, self.maximumValue, 0, M_PI/3);// 2*M_PI
CGFloat startAngle = (4*M_PI)/3;
CGFloat endAngle = startAngle + angleFromTrack;
UIBezierPath *arc = [UIBezierPath bezierPathWithArcCenter:arcCenter radius:arcRadius startAngle:startAngle endAngle:endAngle clockwise:YES];
CGPathRef shape = CGPathCreateCopyByStrokingPath(arc.CGPath, NULL, kArcThickness, kCGLineCapRound, kCGLineJoinRound, 10.0f);
CGMutablePathRef shapeInverse = CGPathCreateMutableCopy(shape);
CGPathAddRect(shapeInverse, NULL, CGRectInfinite);
CGPoint arcEndPoint = [arc currentPoint];
CGContextBeginPath(context);
CGContextAddPath(context, shape);
if (isWhite) {
CGContextSetFillColorWithColor(context, [UIColor colorWithWhite:.9 alpha:1].CGColor);
} else {//70,172, 220
CGContextSetFillColorWithColor(context, [UIColor colorWithRed:70/255.0 green:172/255.0 blue:220/255.0 alpha:1].CGColor);
}
CGContextFillPath(context);
CGContextSaveGState(context); {
CGContextBeginPath(context);
CGContextAddPath(context, shape);
CGContextClip(context);
if (isWhite) {
CGContextSetShadowWithColor(context, CGSizeZero, 7, [UIColor colorWithWhite:0 alpha:.25].CGColor);
} else {
CGContextSetShadowWithColor(context, CGSizeZero, 7, [UIColor colorWithRed:85/255.0 green:183/255.0 blue:230/255.0 alpha:.25].CGColor);
}
CGContextBeginPath(context);
CGContextAddPath(context, shapeInverse);
CGContextFillPath(context);
} CGContextRestoreGState(context);
if (isWhite) {
CGContextSetStrokeColorWithColor(context, [UIColor colorWithWhite:.75 alpha:1].CGColor);
} else {
CGContextSetStrokeColorWithColor(context, [UIColor colorWithRed:62/255.0 green:135/255.0 blue:169/255.0 alpha:1].CGColor);
}
CGContextSetLineWidth(context, 1);
CGContextSetLineJoin(context, kCGLineCapRound);
CGContextBeginPath(context);
CGContextAddPath(context, shape);
CGContextStrokePath(context);
CGPathRelease(shape);
CGPathRelease(shapeInverse);
return arcEndPoint;
}
- (CGPoint)drawTheLineTrack:(float)track withColor:(Boolean) isWhite inContext:(CGContextRef)context
{
CGFloat sliderWidth = [self sliderWidth];
CGFloat xStart = self.bounds.origin.x + (self.bounds.size.width - sliderWidth)/2;
CGFloat lineRectX = (self.bounds.size.width - sliderWidth)/2;
CGFloat lineThickness = kLineWidth/2;
CGFloat lineRectY = (self.bounds.size.height - lineThickness)/2;
CGFloat xPoint = translateValueToPoint(track, xStart, self.maximumValue, sliderWidth);
sliderWidth = xPoint;
CGRect lineRect = CGRectMake(lineRectX, lineRectY, sliderWidth, lineThickness);
UIBezierPath *line = [UIBezierPath bezierPathWithRoundedRect:lineRect cornerRadius:lineThickness/2];
CGPathRef shape = CGPathCreateCopyByStrokingPath(line.CGPath, NULL, lineThickness, kCGLineCapRound, kCGLineJoinRound, 10.0f);
CGMutablePathRef shapeInverse = CGPathCreateMutableCopy(shape);
CGPathAddRect(shapeInverse, NULL, CGRectInfinite);
CGPoint arcEndPoint = CGPointMake(lineRectX + xPoint, lineRectY + (lineThickness/2));
CGContextBeginPath(context);
CGContextAddPath(context, shape);
if (isWhite) {
CGContextSetFillColorWithColor(context, [UIColor colorWithWhite:.9 alpha:1].CGColor);
} else {//70,172, 220
CGContextSetFillColorWithColor(context, [UIColor colorWithRed:70/255.0 green:172/255.0 blue:220/255.0 alpha:1].CGColor);
}
CGContextFillPath(context);
CGContextSaveGState(context); {
CGContextBeginPath(context);
CGContextAddPath(context, shape);
CGContextClip(context);
if (isWhite) {
CGContextSetShadowWithColor(context, CGSizeZero, 7, [UIColor colorWithWhite:0 alpha:.25].CGColor);
} else {
CGContextSetShadowWithColor(context, CGSizeZero, 7, [UIColor colorWithRed:85/255.0 green:183/255.0 blue:230/255.0 alpha:.25].CGColor);
}
CGContextBeginPath(context);
CGContextAddPath(context, shapeInverse);
CGContextFillPath(context);
} CGContextRestoreGState(context);
if (isWhite) {
CGContextSetStrokeColorWithColor(context, [UIColor colorWithWhite:.75 alpha:1].CGColor);
} else {
CGContextSetStrokeColorWithColor(context, [UIColor colorWithRed:62/255.0 green:135/255.0 blue:169/255.0 alpha:1].CGColor);
}
CGRect outlineRect = CGRectMake(lineRectX - (lineThickness/2), lineRectY - (lineThickness/2), sliderWidth + lineThickness, lineThickness * 2);
UIBezierPath *outline = [UIBezierPath bezierPathWithRoundedRect:outlineRect cornerRadius:lineThickness];
CGContextSetLineWidth(context, 1);
CGContextSetLineJoin(context, kCGLineCapSquare);
CGContextBeginPath(context);
CGContextAddPath(context, outline.CGPath);
CGContextStrokePath(context);
CGPathRelease(shape);
CGPathRelease(shapeInverse);
return arcEndPoint;
}
- (void)drawRect:(CGRect)rect {
CGContextRef context = UIGraphicsGetCurrentContext();
CGPoint middlePoint;
switch (self.sliderStyle) {
case UISliderStyleLine:
[self drawTheLineTrack:self.maximumValue withColor:YES inContext:context];
self.thumbCenterPoint = [self drawTheLineTrack:self.value withColor:NO inContext:context];
[self drawThumbAtPoint:self.thumbCenterPoint inContext:context];
break;
case UISliderStyleArc:
default:
middlePoint.x = self.bounds.origin.x + self.bounds.size.width/2;
middlePoint.y = self.bounds.origin.y + self.bounds.size.width;
CGFloat radius = [self sliderRadius];
[self drawTheArcTrack:self.maximumValue atPoint:middlePoint withRadius:radius AndColor:YES inContext:context];
self.thumbCenterPoint = [self drawTheArcTrack:self.value atPoint:middlePoint withRadius:radius AndColor:NO inContext:context];
[self drawThumbAtPoint:self.thumbCenterPoint inContext:context];
break;
}
}
/** @name Thumb management methods */
#pragma mark - Thumb management methods
- (BOOL)isPointInThumb:(CGPoint)point {
CGRect thumbTouchRect = CGRectMake(self.thumbCenterPoint.x - kThumbRadius, self.thumbCenterPoint.y - kThumbRadius, kThumbRadius*2, kThumbRadius*2);
return CGRectContainsPoint(thumbTouchRect, point);
}
/** @name UIGestureRecognizer management methods */
#pragma mark - UIGestureRecognizer management methods
- (void)panGestureHappened:(UIPanGestureRecognizer *)panGestureRecognizer {
CGPoint tapLocation = [panGestureRecognizer locationInView:self];
switch (panGestureRecognizer.state) {
case UIGestureRecognizerStateChanged: {
CGFloat radius;
CGPoint sliderCenter;
CGPoint sliderStartPoint;
CGFloat angle;
CGFloat xStart;
CGFloat maximumValue;
CGFloat sliderWidth;
CGFloat point;
switch (self.sliderStyle) {
case UISliderStyleLine:
sliderWidth = [self sliderWidth];
xStart = self.bounds.origin.x + (self.bounds.size.width - sliderWidth)/2;
maximumValue = self.maximumValue;
point = tapLocation.x;
self.value = translatePointToValue(point, xStart, maximumValue, sliderWidth);
break;
case UISliderStyleArc:
default:
radius = [self sliderRadius];
sliderCenter = CGPointMake(self.bounds.size.width/2, self.bounds.size.width);
sliderStartPoint = CGPointMake(sliderCenter.x - (radius * 1.15), sliderCenter.y - (radius * 2.1));
angle = angleBetweenThreePoints(sliderCenter, sliderStartPoint, tapLocation);
if (angle < 0) {
angle = -angle;
}
else {
angle = 0.0;
//angle = M_PI/3 - angle;
}
self.value = translateValueFromSourceIntervalToDestinationInterval(angle, 0, M_PI/3, self.minimumValue, self.maximumValue);
break;
}
}
default:
break;
}
}
- (void)tapGestureHappened:(UITapGestureRecognizer *)tapGestureRecognizer {
if (tapGestureRecognizer.state == UIGestureRecognizerStateEnded) {
CGPoint tapLocation = [tapGestureRecognizer locationInView:self];
if ([self isPointInThumb:tapLocation]) {
// do something on tap
}
else {
}
}
}
@end
/** @name Utility Functions */
#pragma mark - Utility Functions
float translateValueFromSourceIntervalToDestinationInterval(float sourceValue, float sourceIntervalMinimum, float sourceIntervalMaximum, float destinationIntervalMinimum, float destinationIntervalMaximum) {
float a, b, destinationValue;
a = (destinationIntervalMaximum - destinationIntervalMinimum)/(sourceIntervalMaximum - sourceIntervalMinimum);
b = destinationIntervalMaximum - a*sourceIntervalMaximum;
destinationValue = a*sourceValue + b;
return destinationValue;
}
float translateValueToPoint(float value, float xStart, float maximum, float width)
{
float point = (width * value)/maximum;
//
// point = xStart + point;
//
return point;
}
float translatePointToValue(float point, float xStart, float maximum, float width)
{
float value = (point) * maximum;
value = value/width;
return value;
}
CGFloat angleBetweenThreePoints(CGPoint centerPoint, CGPoint p1, CGPoint p2) {
CGPoint v1 = CGPointMake(p1.x - centerPoint.x, p1.y - centerPoint.y);
CGPoint v2 = CGPointMake(p2.x - centerPoint.x, p2.y - centerPoint.y);
CGFloat angle = atan2f(v2.x*v1.y - v1.x*v2.y, v1.x*v2.x + v1.y*v2.y);
return angle;
}
साथ ही आप 
धन्यवाद रोब कोड के लिए, यह वास्तव में मददगार था अंगूठे छवि की आवश्यकता करेंगे .. – Shashank
शानदार काम करता है! बहुत बहुत धन्यवाद। एक चीज जो मुझे करने की ज़रूरत थी वह स्वयं को सेट करना था। बैकग्राउंड कस्टम कस्टम यूवीव सबक्लास में साफ़ करने के लिए जिसने ड्रॉरेक्ट जादू किया था। – Chris
@Shashank क्या आप उस पथ पर उस स्लाइडर को स्थानांतरित करने में सक्षम हैं? क्या आप अपना कोड साझा कर सकते हैं? – NSCry