iOS 绘制View

@implementation TimeStampView
@synthesize image;
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        //self.clearsContextBeforeDrawing = NO;
        //
        labelStrokeColor = [UIColor whiteColor];//[UIColor blackColor];
        labelStrokeWidth = 1;
        labelFillColor = [UIColor whiteColor];//[UIColor grayColor];
        labelFont = [UIFont fontWithName:@"Arial" size:13];
        //
        minorTickColor = [UIColor whiteColor];//[UIColor grayColor];//[UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:.7];
        minorTickLength = frame.size.height*0.15;
        minorTickWidth = 1;
        //
        majorTickColor = [UIColor whiteColor];//[UIColor grayColor];//[UIColor colorWithRed:0.9 green:0.9 blue:0.9 alpha:1];
        majorTickLength = frame.size.height*0.38;
        majorTickWidth = 1;
        //
        shadowColor = [UIColor whiteColor];//[UIColor grayColor];
        shadowOffset = CGSizeMake(1.0,0.0);
        shadowBlur = .5;
    }
    return self;
}

- (NSInteger)getSuperviewFrameWidth
{
    return self.superview.frame.size.width ;
}
-(void)setDayCount:(NSInteger)iCount beginTime:(NSInteger)ibeginTime{
    iDayCount = iCount;
     m_iBeginUnixTime = ibeginTime;
}
-(void)setMinorTickDistance:(float)fDistance nubPerMajorTick:(NSInteger)iNum{
    minorTickDistance  = fDistance;
    minorTicksPerMajorTick = iNum;
}
-(void)setLabelProperties:(UIColor *)color fillColor:(UIColor *)fillColor font:(UIFont *)font width:(CGFloat)width{
    labelStrokeColor = color;
    labelStrokeWidth = width;
    labelFillColor = fillColor;
    labelFont = font;
}
-(void)setMinorTickProperties:(UIColor *)color length:(CGFloat)len width:(CGFloat)width{
     minorTickColor = color;
    minorTickLength = len;
    minorTickWidth = width;
}
-(void)setMajorTickProperties:(UIColor *)color length:(CGFloat)len width:(CGFloat)width{
    majorTickColor = color;
    majorTickLength = len;
    majorTickWidth = width;
}
-(void)setShadowProperties:(UIColor *)color offset:(CGSize)offset blur:(CGFloat)fBlur{
    shadowColor = color;
    shadowOffset = offset;
    shadowBlur = fBlur;
}
- (void)drawRect:(CGRect)rect {
    return;
}

- (void)drawTicksWithContext:(CGContextRef)context atPoint:(CGPoint)point
{
    float x = point.x;
    if ([self isMajorTick:x]) {
        [self drawMajorTickWithContext:context
                               atPoint:point
                             withColor:majorTickColor
                                 width:majorTickWidth
                                length:majorTickLength];
        int iNumber = 24;
        if(m_Style == DayStyle){
            iNumber = 1;
        }else if (m_Style == HourStyle) {
            iNumber = 24;
        }
        NSString *text = nil;
        iIndexMinorTick = 0;
        if ((iIndexMajorTick %iNumber) ==0 ){
            // day
            NSInteger unixTime =  m_iBeginUnixTime+(iIndexMajorTick/iNumber*(24*3600));
            LocalNowTime *time = [[LocalNowTime alloc]initWithUnixTime:unixTime];
            text =[NSString stringWithFormat:@"%02d月%02d日",time.Month,time.Day];//@"%04d年%02d月%02d日"
            
        }else{
            //middle houre
            text = [NSString stringWithFormat:@"%02d:00", iIndexMajorTick%24];
        }

        iIndexMajorTick++;
        if((m_Style == DayStyle) &&(iIndexMajorTick> iDayCount+1)){
            return;
        }
        point.y =self.frame.size.height*0.85;
        [self drawLabelWithContext:context
                           atPoint:point
                              text:text
                         fillColor:labelFillColor
                       strokeColor: labelStrokeColor];
    } else {
        iIndexMinorTick++;
        if (((iIndexMinorTick %10)==0) && (m_Style == MinuteStyle) ){
            //seconds
            NSString *text =[NSString stringWithFormat:@"%02d'", iIndexMinorTick*2];
            point.y =self.frame.size.height*0.85;
            [self drawLabelWithContext:context
                               atPoint:point
                                  text:text
                             fillColor:minorTickColor
                           strokeColor: labelStrokeColor];
            float fInc = minorTickLength/4.0;
            point.y=self.frame.size.height*0.5-fInc;
            [self drawMinorTickWithContext:context
                                   atPoint:point
                                 withColor: minorTickColor
                                     width: minorTickWidth
                                    length: minorTickLength+fInc*2];
            
        }else{
            point.y=self.frame.size.height*0.5;
            [self drawMinorTickWithContext:context
                                   atPoint:point
                                 withColor: minorTickColor
                                     width: minorTickWidth
                                    length: minorTickLength];
        }
    }
}
- (BOOL)isMajorTick:(int)x {
    
    int tick_number = x / minorTickDistance;
    
    return (tick_number % minorTicksPerMajorTick) == 0;
}

- (void)setDialRangeFrom:(NSInteger)from to:(NSInteger)to {
    
//    _minimum = from;
//    _maximum = to;
    
    // Resize the frame of the view
    CGRect frame = self.frame;
    
//    frame.size.width = (_maximum - _minimum) * _minorTickDistance + self.superview.frame.size.width;
    
    NSLog(@"frame = %@", NSStringFromCGRect(frame));
    
    self.frame = frame;
}

#pragma mark - Drawing

- (void)drawLabelWithContext:(CGContextRef)context
                     atPoint:(CGPoint)point
                        text:(NSString *)text
                   fillColor:(UIColor *)fillColor
                 strokeColor:(UIColor *)strokeColor {
    
    
    CGSize boundingBox = [text sizeWithFont:labelFont];
    NSInteger label_x = point.x - (boundingBox.width / 2);
    if (label_x <=0) {
        label_x =0;
    }
    CGContextSetStrokeColorWithColor(context, strokeColor.CGColor);
    CGContextSetFillColorWithColor(context, fillColor.CGColor);
    
    CGContextSetLineWidth(context, labelStrokeWidth);
    CGRect rect;
    if (m_Style == DayStyle) {
        rect.origin.x =point.x;
    }else{
        rect.origin.x =label_x+1;
    }
    
    rect.origin.y =point.y+(self.frame.size.height-point.y -boundingBox.height)/2;
    if (rect.origin.y <=0) {
        rect.origin.y =self.frame.size.height-boundingBox.height;
    }
    rect.size.width = boundingBox.width;
    rect.size.height = boundingBox.height;
    
    //    if (boundingBox.width <25) {
    //        rect =CGRectMake(label_x+boundingBox.width/2-8, self.frame.size.height-boundingBox.height, boundingBox.width, boundingBox.height);
    //    }else{
    //        rect =CGRectMake(label_x+boundingBox.width/2+1, self.frame.size.height-boundingBox.height, boundingBox.width, boundingBox.height);
    //    }
    
    [text drawInRect:rect
            withFont:labelFont
       lineBreakMode:NSLineBreakByTruncatingTail
           alignment:NSTextAlignmentCenter];
    //CGContextSetShouldAntialias(context, NO );
}

- (void)drawMinorTickWithContext:(CGContextRef)context
                         atPoint:(CGPoint)point
                       withColor:(UIColor *)color
                           width:(CGFloat)width
                          length:(CGFloat)length {
    
    CGContextSetStrokeColorWithColor(context, color.CGColor);
    CGContextSetLineWidth(context, width);
    
    CGContextMoveToPoint(context, point.x, point.y);
    CGContextAddLineToPoint(context, point.x, point.y + length);
    
    CGContextStrokePath(context);
}

- (void)drawMajorTickWithContext:(CGContextRef)context
                         atPoint:(CGPoint)point
                       withColor:(UIColor *)color
                           width:(CGFloat)width
                          length:(CGFloat)length {
    
    // Draw the line
    CGContextSetStrokeColorWithColor(context, color.CGColor);
    CGContextSetLineWidth(context, width);
    CGContextSetLineCap(context, kCGLineCapRound);
    
    CGContextMoveToPoint(context, point.x, point.y);
    CGContextAddLineToPoint(context, point.x, point.y + length);
    
    CGContextStrokePath(context);
    
}

-(UIImage *)getImageFromStyle:(TimeShiftedStyle)style{
    
    m_Style = style;
    //UIGraphicsBeginImageContext(imageView.frame.size);
    UIGraphicsBeginImageContextWithOptions(self.frame.size, NO, 0);
    // Drawing code.
    //获得处理的上下文
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextClearRect(context, self.frame);
    
    //设置线条样式
    CGContextSetLineCap(context, kCGLineCapSquare);
    //设置线条粗细宽度
    CGContextSetLineWidth(context, 1.0);
    
    //设置颜色
    CGContextSetRGBStrokeColor(context, 1.0, 1.0, 1.0, 0.6);
    //开始一个起始路径
    CGContextBeginPath(context);
    
    float fPointY =self.frame.size.height*0.34;
    
    CGContextMoveToPoint(context, 0, fPointY);
    CGContextAddLineToPoint(context, self.frame.size.width, fPointY);
    
    fPointY =self.frame.size.height*0.813;
    CGContextMoveToPoint(context, 0, fPointY);
    CGContextAddLineToPoint(context, self.frame.size.width, fPointY);
    CGContextStrokePath(context);
    
    iIndexMajorTick =0;
    
    
    fPointY =self.frame.size.height*0.39;
    for (int i = 0; i < self.frame.size.width+1; i += minorTickDistance) {
        CGPoint  point = CGPointMake(i, fPointY);
        [self drawTicksWithContext:context atPoint:point];
    }
    
    CGContextSetFillColorWithColor(context, HEX2RGB(@"#fafafa").CGColor);
    CGRect blackRect =  CGRectMake(self.frame.origin.x,
                                   self.frame.size.height*0.53 ,
                                   self.frame.size.width ,
                                   self.frame.size.height*0.09);
    CGContextFillRect(context, blackRect);
    CGContextStrokePath(context);
    
    CGContextSetLineCap(context, kCGLineCapSquare);
    CGContextSetLineWidth(context, 1.0);
    CGContextSetRGBStrokeColor(context, 0.5, 0.5, 0.5, 0.6);
    fPointY =self.frame.size.height*0.62;
    CGContextMoveToPoint(context, 0, fPointY);
    CGContextAddLineToPoint(context, self.frame.size.width, fPointY);
    CGContextStrokePath(context);
    
    image=UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    
    
//    [labelStrokeColor release];
//    [labelFillColor release];
//    [labelFont release];
//    [minorTickColor release];
//    [majorTickColor release];
//    [shadowColor release];
//    labelStrokeColor=labelFillColor=labelFont=minorTickColor=majorTickColor=shadowColor=nil;
    
    //    NSLog(@"&&&1");
    //
    //    //UIImage *img = [image copy];
    //    //UIImage *img
    //UIImagePNGRepresentation(image);
//    UIImage *img=[[UIImage alloc]initWithData:UIImagePNGRepresentation(image)];
//    [image release];
//    image =nil;
    //    NSLog(@"&&&2");
    //    UIImageWriteToSavedPhotosAlbum(image, nil,nil , nil ) ;
    return image;
}

@end