UILabel添加发光效果

#import <UIKit/UIKit.h>@interface DTGlowingLabel : UILabel{    UIColor *_outLineColor;    UIColor *_insideColor;    UIColor *b_lurColor;}@property (nonatomic, retain) UIColor *outLineColor;@property (nonatomic, retain) UIColor *insideColor;@property (nonatomic, retain) UIColor *blurColor;@end

#import "DTGlowingLabel.h"@implementation DTGlowingLabel@synthesize insideColor  = _insideColor;@synthesize outLineColor = _outLineColor;@synthesize blurColor    = _blurColor;- (id) init{    if(self=[super init])    {            }    return self;}- (void) drawRect:(CGRect)rect{    CGContextRef ctx = UIGraphicsGetCurrentContext();    CGContextSetStrokeColorWithColor(ctx, _outLineColor.CGColor);    CGContextSetFillColorWithColor(ctx, _insideColor.CGColor);    CGContextSetLineWidth(ctx, self.font.pointSize/60.0);    CGContextSetShadowWithColor(ctx, CGSizeMake(0, 0), self.font.pointSize / 10.0, _blurColor.CGColor);    CGTextDrawingMode mode = (_outLineColor==nil)? kCGTextFill: ((_insideColor==nil)?kCGTextStroke:kCGTextFillStroke);    CGContextSetTextDrawingMode(ctx, mode);    [self.text drawInRect:self.bounds withFont:self.font lineBreakMode:self.lineBreakMode alignment:self.textAlignment];}- (void)dealloc{    [super dealloc];    [self.insideColor  release];    [self.outLineColor release];    [self.blurColor    release];}@end