支援輝光效果的Label，輝光效果Label

支援輝光效果的Label，輝光效果Label

支援輝光效果的Label

 

效果

 

源碼

https://github.com/YouXianMing/UI-Component-Collection 中的 FBGlowLabel

////  FBGlowLabel.h////  Created by YouXianMing on 16/8/3.//  Copyright © 2016年 YouXianMing. All rights reserved.////  https://github.com/lyokato/fbglowlabel//#import <UIKit/UIKit.h>@interface FBGlowLabel : UILabel/** *  Glow size, default is 0.f. */@property (nonatomic) CGFloat glowSize;/** *  Glow color, default is clear color. */@property (nonatomic, strong) UIColor *glowColor;/** *  Inner glow size, default is 0.f. */@property (nonatomic) CGFloat innerGlowSize;/** *  Inner glow color, default is clear color. */@property (nonatomic, strong) UIColor *innerGlowColor;@end

////  FBGlowLabel.m////  Created by YouXianMing on 16/8/3.//  Copyright © 2016年 YouXianMing. All rights reserved.//#import "FBGlowLabel.h"@implementation FBGlowLabel- (id)initWithFrame:(CGRect)frame {        if (self = [super initWithFrame:frame]) {                [self setup];    }        return self;}- (id)initWithCoder:(NSCoder *)coder {        if (self = [super initWithCoder:coder]) {                [self setup];    }        return self;}- (void)setup {        self.glowSize       = 0.0f;    self.glowColor      = [UIColor clearColor];        self.innerGlowSize  = 0.0f;    self.innerGlowColor = [UIColor clearColor];}- (void)drawTextInRectForIOS7:(CGRect)rect {        CGContextRef ctx = UIGraphicsGetCurrentContext();        UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0.0);        [super drawTextInRect:rect];    UIImage *textImage = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();        CGContextSaveGState(ctx);        if (_glowSize > 0) {                CGContextSetShadow(ctx, CGSizeZero, _glowSize);        CGContextSetShadowWithColor(ctx, CGSizeZero, _glowSize, _glowColor.CGColor);    }        [textImage drawAtPoint:rect.origin];    CGContextRestoreGState(ctx);        if (_innerGlowSize > 0) {        UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0.0);        CGContextRef ctx2 = UIGraphicsGetCurrentContext();        CGContextSaveGState(ctx2);        CGContextSetFillColorWithColor(ctx2, [UIColor blackColor].CGColor);        CGContextFillRect(ctx2, rect);        CGContextTranslateCTM(ctx2, 0.0, rect.size.height);        CGContextScaleCTM(ctx2, 1.0, -1.0);        CGContextClipToMask(ctx2, rect, textImage.CGImage);        CGContextClearRect(ctx2, rect);        CGContextRestoreGState(ctx2);                UIImage *inverted = UIGraphicsGetImageFromCurrentImageContext();        CGContextClearRect(ctx2, rect);                CGContextSaveGState(ctx2);        CGContextSetFillColorWithColor(ctx2, _innerGlowColor.CGColor);        CGContextSetShadowWithColor(ctx2, CGSizeZero, _innerGlowSize, _innerGlowColor.CGColor);        [inverted drawAtPoint:CGPointZero];        CGContextTranslateCTM(ctx2, 0.0, rect.size.height);        CGContextScaleCTM(ctx2, 1.0, -1.0);        CGContextClipToMask(ctx2, rect, inverted.CGImage);        CGContextClearRect(ctx2, rect);        CGContextRestoreGState(ctx2);                UIImage *innerShadow = UIGraphicsGetImageFromCurrentImageContext();                UIGraphicsEndImageContext();        [innerShadow drawAtPoint:rect.origin];    }}- (void)drawTextInRectForIOS6:(CGRect)rect {        CGContextRef ctx = UIGraphicsGetCurrentContext();    CGContextSaveGState(ctx);        if (self.glowSize > 0) {                CGContextSetShadow(ctx, CGSizeZero, _glowSize);        CGContextSetShadowWithColor(ctx, CGSizeZero, _glowSize, _glowColor.CGColor);    }        [super drawTextInRect:rect];    CGContextRestoreGState(ctx);        if (_innerGlowSize > 0) {        UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0.0);                CGContextRef ctx2 = UIGraphicsGetCurrentContext();        [super drawTextInRect:rect];                UIImage *textImage = UIGraphicsGetImageFromCurrentImageContext();        CGContextClearRect(ctx2, rect);                CGContextSaveGState(ctx2);        CGContextSetFillColorWithColor(ctx2, [UIColor blackColor].CGColor);        CGContextFillRect(ctx2, rect);        CGContextTranslateCTM(ctx2, 0.0, rect.size.height);        CGContextScaleCTM(ctx2, 1.0, -1.0);        CGContextClipToMask(ctx2, rect, textImage.CGImage);        CGContextClearRect(ctx2, rect);        CGContextRestoreGState(ctx2);                UIImage *inverted = UIGraphicsGetImageFromCurrentImageContext();        CGContextClearRect(ctx2, rect);                CGContextSaveGState(ctx2);        CGContextSetFillColorWithColor(ctx2, _innerGlowColor.CGColor);        CGContextSetShadowWithColor(ctx2, CGSizeZero, _innerGlowSize, _innerGlowColor.CGColor);        [inverted drawAtPoint:CGPointZero];        CGContextTranslateCTM(ctx2, 0.0, rect.size.height);        CGContextScaleCTM(ctx2, 1.0, -1.0);        CGContextClipToMask(ctx2, rect, inverted.CGImage);        CGContextClearRect(ctx2, rect);        CGContextRestoreGState(ctx2);                UIImage *innerShadow = UIGraphicsGetImageFromCurrentImageContext();                UIGraphicsEndImageContext();        [innerShadow drawAtPoint:rect.origin];    }}- (void)drawTextInRect:(CGRect)rect {        if (self.text == nil || self.text.length == 0) {                return;    }        if ([[[UIDevice currentDevice] systemVersion] compare:@"7.0" options:NSNumericSearch] != NSOrderedAscending) {                [self drawTextInRectForIOS7:rect];            } else {                [self drawTextInRectForIOS6:rect];    }}@end

////  ViewController.m//  FBGlowLabel////  Created by YouXianMing on 16/8/3.//  Copyright © 2016年 YouXianMing. All rights reserved.//#import "ViewController.h"#import "FBGlowLabel.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {        [super viewDidLoad];        self.view.backgroundColor = [UIColor blackColor];        FBGlowLabel *glowLabel    = [[FBGlowLabel alloc] initWithFrame:self.view.bounds];    [self.view addSubview:glowLabel];        glowLabel.text            = @"壹擊必殺";    glowLabel.textAlignment   = NSTextAlignmentCenter;    glowLabel.backgroundColor = [UIColor clearColor];    glowLabel.font            = [UIFont fontWithName:@"Heiti SC" size:40.f];    glowLabel.textColor       = [[UIColor cyanColor] colorWithAlphaComponent:0.95f];        glowLabel.glowSize       = 6;    glowLabel.glowColor      = [UIColor cyanColor];        glowLabel.innerGlowSize  = 3;    glowLabel.innerGlowColor = [[UIColor blackColor] colorWithAlphaComponent:0.25f];}@end