圆环，扇形控件基本算法一种实现 - 代码库 - CocoaChina_让移动开发更简单
//
// CircleCore.h
// Quartz
//
// Created by 仙人掌 on 12-11-5.
// Copyright (c) 2012年 仙人掌. All rights reserved.
//
#import
#define ToRad( degree ) ( degree * M_PI / 180 )
#define ToDeg( rad ) ( rad / M_PI * 180 )
#define ZERO_DEGREE (-90.0f)
typedef enum{
PT_DONE = 0,
PT_UNDONE,
}Path_Type;
typedef struct CircleData{
CGPoint center;
CGFloat radius;
}CircleData;
CircleData CircleDataMake(CGPoint center, CGFloat radius);
CGFloat DistanceBetweenPoints(CGPoint point1,CGPoint point2);
@interface CircleCore : NSObject{
CGFloat referenceDegree_;
CGFloat currentDegree_;
CircleData smallCircle_;
CircleData largeCircle_;
}
@property( nonatomic ) CGFloat referenceDegree;
@property( nonatomic ) CGFloat currentDegree;
@property( nonatomic ) CircleData smallCircle;
@property( nonatomic ) CircleData largeCircle;
-(CGMutablePathRef)GetPathForMode:(Path_Type)pathType;
-(BOOL)PointInPathWithPoint:(CGPoint)point BetweenDegree:(CGFloat)start And:(CGFloat)end;
@end
//-----------------------------------------------------------------------------------------------------------------------------------------------------
//
// CircleCore.m
// Quartz
//
// Created by 仙人掌 on 12-11-5.
// Copyright (c) 2012年 仙人掌. All rights reserved.
//
#import "CircleCore.h"
CircleData CircleDataMake(CGPoint center, CGFloat radius){
CircleData myCircleData;
myCircleData.center = center;
myCircleData.radius = radius;
return myCircleData;
}
CGFloat DistanceBetweenPoints(CGPoint point1,CGPoint point2){
CGFloat temp = ( point1.x - point2.x ) * ( point1.x - point2.x ) + ( point1.y - point2.y ) * ( point1.y - point2.y );
return ( CGFloat )sqrt( temp );
}
@interface CircleCore(Pravite)
-(CGMutablePathRef)GetPathForMode_DONE;
-(CGMutablePathRef)GetPathForMode_UNDONE;
-(CGPoint)GetPointWithCircle:(CircleData)circle AtDegree:(CGFloat)degree;
@end
@implementation CircleCore(Pravite)
-(CGPoint)GetPointWithCircle:(CircleData)circle AtDegree:(CGFloat)degree{
CGFloat x,y;
x = circle.center.x + cos( ToRad( degree ) ) * circle.radius;
y = circle.center.y + sin( ToRad( degree ) ) * circle.radius;
return CGPointMake( x, y );
}
-(CGMutablePathRef)GetPathForMode_DONE{
CGMutablePathRef resultPath = CGPathCreateMutable();
CGPoint smallCircle_referencePoint = [self GetPointWithCircle:smallCircle_ AtDegree:referenceDegree_];
CGPoint largeCircle_referencePoint = [self GetPointWithCircle:largeCircle_ AtDegree:referenceDegree_];
CGPoint smallCircle_currentPoint = [self GetPointWithCircle:smallCircle_ AtDegree:currentDegree_];
CGPathMoveToPoint( resultPath, NULL, smallCircle_referencePoint.x, smallCircle_referencePoint.y );
CGPathAddLineToPoint( resultPath, NULL, largeCircle_referencePoint.x, largeCircle_referencePoint.y );
CGPathAddArc( resultPath, NULL, smallCircle_.center.x, smallCircle_.center.y, largeCircle_.radius, ToRad( referenceDegree_ ), ToRad( currentDegree_ ), 0 );
CGPathAddLineToPoint( resultPath, NULL, smallCircle_currentPoint.x, smallCircle_currentPoint.y );
CGPathAddArc( resultPath, NULL, smallCircle_.center.x, smallCircle_.center.y, smallCircle_.radius, ToRad( currentDegree_ ), ToRad( referenceDegree_ ), 1 );
return resultPath;
}
-(CGMutablePathRef)GetPathForMode_UNDONE{
CGMutablePathRef resultPath = CGPathCreateMutable();
CGPoint largeCircle_referencePoint = [self GetPointWithCircle:largeCircle_ AtDegree:referenceDegree_];
CGPoint smallCircle_currentPoint = [self GetPointWithCircle:smallCircle_ AtDegree:currentDegree_];
CGPathMoveToPoint(resultPath, NULL, largeCircle_referencePoint.x, largeCircle_referencePoint.y);
CGPathAddArc(resultPath, NULL, largeCircle_.center.x, largeCircle_.center.y, largeCircle_.radius, ToRad(referenceDegree_), ToRad(currentDegree_), 1);
CGPathAddLineToPoint(resultPath, NULL, smallCircle_currentPoint.x, smallCircle_currentPoint.y);
CGPathAddArc(resultPath, NULL, smallCircle_.center.x, smallCircle_.center.y, smallCircle_.radius, ToRad(currentDegree_), ToRad(referenceDegree_), 0);
CGPathAddLineToPoint(resultPath, NULL, largeCircle_referencePoint.x, largeCircle_referencePoint.y);
return resultPath;
}
@end
@implementation CircleCore
@synthesize referenceDegree = referenceDegree_;
@synthesize currentDegree = currentDegree_;
@synthesize smallCircle = smallCircle_;
@synthesize largeCircle = largeCircle_;
-(id)init{
self = [super init];
if ( nil != self){
referenceDegree_ = ZERO_DEGREE;
referenceDegree_ = ZERO_DEGREE;
}
return self;
}
-(CGFloat)referenceDegree{
return referenceDegree_ - ZERO_DEGREE;
}
-(void)setReferenceDegree:(CGFloat)referenceDegree{
referenceDegree_ = referenceDegree + ZERO_DEGREE;
}
-(void)setCurrentDegree:(CGFloat)currentDegree{
currentDegree_ = currentDegree + ZERO_DEGREE;
}
-(CGFloat)currentDegree{
return currentDegree_ - ZERO_DEGREE;
}
-(CGMutablePathRef)GetPathForMode:(Path_Type)pathType{
switch (pathType) {
case PT_DONE:
return [self GetPathForMode_DONE];
case PT_UNDONE:
return [self GetPathForMode_UNDONE];
default:
return NULL;
}
}
-(BOOL)PointInPathWithPoint:(CGPoint)point BetweenDegree:(CGFloat)start And:(CGFloat)end{
CGFloat distance = DistanceBetweenPoints( point, largeCircle_.center );
if ( distance > largeCircle_.radius || distance < smallCircle_.radius )
return NO;
CGFloat base_degree = 0.0f;
NSInteger flag = 0;
CGPoint base_point = CGPointMake( point.x - largeCircle_.center.x, largeCircle_.center.y - point.y );
if ( base_point.x >= 0.0f && base_point.y >= 0.0f ){ //第一象限
base_degree = 0.0f;
flag = 1;
}
else if ( base_point.x < 0 && base_point.y >= 0 ){ //第二象限
base_degree = 360.0;
flag = 2;
}
else if ( base_point.x <0 && base_point.y < 0 ){ //第三象限
base_degree = 180.0f;
flag = 3;
}
else{ //第四象限
base_degree = 180.0f;
flag = 4;
}
//
CGFloat x = ABS( base_point.x );
double temp_rad = asin( x / distance );
CGFloat result = 0.0f;
if ( 1 == flag || 3 == flag )
result = ToDeg( temp_rad ) + base_degree;
else
result = base_degree - ToDeg( temp_rad );
if ( result >= start && result <= end )
return YES;
else
return NO;
}
@end