辉光UIView的category
本人视频教程系类 iOS中CALayer的使用
效果如下：
源码：
UIView+GlowView.h 与 UIView+GlowView.m
//
// UIView+GlowView.h
// YouXianClock
//
// Created by YouXianMing on 14-12-21.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import <UIKit/UIKit.h> @interface UIView (GlowView) @property (nonatomic, strong) NSNumber *GCDTimerInterval; // 定时器的时间间隔，给float值
@property (nonatomic, strong) NSNumber *glowDuration; // layer动画的时间长度，给float值
@property (nonatomic, strong) NSNumber *glowLayerOpacity; // 设置glowLayer的动画透明度的程度，给float值，范围在[0,1] - (void)createGlowLayerWithColor:(UIColor *)color glowRadius:(CGFloat)radius;
- (void)startGlow;
- (void)glowToGlowLayerOnce;
- (void)glowToNormalLayerOnce; @end
//
// UIView+GlowView.m
// YouXianClock
//
// Created by YouXianMing on 14-12-21.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import "UIView+GlowView.h"
#import <objc/runtime.h> #define GLOWVIEW_LAYER_FLAG @"UIView+GlowView" @interface UIView () @property (strong, nonatomic) dispatch_source_t dispatchSource;
@property (strong, nonatomic) NSNumber *glowViewShowFlag; @end @implementation UIView (GlowView) #pragma mark - 动态添加了属性
static char dispatchSourceTimerFlag;
- (void)setDispatchSource:(dispatch_source_t)dispatchSource {
objc_setAssociatedObject(self, &dispatchSourceTimerFlag, dispatchSource, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (dispatch_source_t)dispatchSource {
return objc_getAssociatedObject(self, &dispatchSourceTimerFlag);
} static char charGlowViewShowFlag;
- (void)setGlowViewShowFlag:(NSNumber *)glowViewShowFlag {
objc_setAssociatedObject(self, &charGlowViewShowFlag, glowViewShowFlag, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (NSNumber *)glowViewShowFlag {
return objc_getAssociatedObject(self, &charGlowViewShowFlag);
} static char GCDTimerIntervalFlag;
- (void)setGCDTimerInterval:(NSNumber *)GCDTimerInterval {
objc_setAssociatedObject(self, &GCDTimerIntervalFlag, GCDTimerInterval, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (NSNumber *)GCDTimerInterval {
return objc_getAssociatedObject(self, &GCDTimerIntervalFlag);
} static char glowLayerOpacityFlag;
- (void)setGlowLayerOpacity:(NSNumber *)glowLayerOpacity {
objc_setAssociatedObject(self, &glowLayerOpacityFlag, glowLayerOpacity, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (NSNumber *)glowLayerOpacity {
return objc_getAssociatedObject(self, &glowLayerOpacityFlag);
} static char glowDurationFlag;
- (void)setGlowDuration:(NSNumber *)glowDuration {
objc_setAssociatedObject(self, &glowDurationFlag, glowDuration, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (NSNumber *)glowDuration {
return objc_getAssociatedObject(self, &glowDurationFlag);
} #pragma mark - 方法
- (void)createGlowLayerWithColor:(UIColor *)color glowRadius:(CGFloat)radius {
UIGraphicsBeginImageContextWithOptions(self.bounds.size, NO, [UIScreen mainScreen].scale);
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIBezierPath* path = \
[UIBezierPath bezierPathWithRect:(CGRect){CGPointZero, CGSizeMake(self.bounds.size.width, self.bounds.size.height)}];
[color setFill];
[path fillWithBlendMode:kCGBlendModeSourceAtop alpha:1.0]; CALayer *glowLayer = [CALayer layer];
glowLayer.name = GLOWVIEW_LAYER_FLAG;
glowLayer.frame = self.bounds;
glowLayer.contents = (__bridge id)UIGraphicsGetImageFromCurrentImageContext().CGImage;
glowLayer.shadowOpacity = 1.0f;
glowLayer.shadowOffset = CGSizeMake(, );
glowLayer.shadowColor = (color == nil ? [UIColor redColor].CGColor : color.CGColor);
glowLayer.shadowRadius = (radius > ? radius : .f);
glowLayer.opacity = .f; // 开始时候的透明度为0
[self.layer addSublayer:glowLayer]; UIGraphicsEndImageContext();
} - (void)startGlow {
[self.layer.sublayers enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
CALayer *layer = obj; // 找到了layer才进行下面的操作
if ([layer.name isEqualToString:GLOWVIEW_LAYER_FLAG]) { if (self.glowViewShowFlag == nil) {
self.glowViewShowFlag = [NSNumber numberWithBool:NO];
} if (self.dispatchSource == nil) {
self.dispatchSource = \
dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, , , dispatch_get_main_queue());
dispatch_source_set_timer(self.dispatchSource, dispatch_time(DISPATCH_TIME_NOW, ),
NSEC_PER_SEC * (self.GCDTimerInterval == nil ? : self.GCDTimerInterval.floatValue), );
dispatch_source_set_event_handler(self.dispatchSource, ^{
if (self.glowViewShowFlag.boolValue == NO) {
self.glowViewShowFlag = @(YES); // 做动画，从透明到显示出来
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"]; if (self.glowLayerOpacity != nil) {
animation.fromValue = @(.f);
animation.toValue = [NSNumber numberWithFloat:self.glowLayerOpacity.floatValue];
layer.opacity = self.glowLayerOpacity.floatValue;
} else {
animation.fromValue = @(.f);
animation.toValue = @(0.8f);
layer.opacity = 0.8;
} if (self.glowDuration != nil) {
animation.duration = self.glowDuration.floatValue;
} else {
animation.duration = 0.8;
} [layer addAnimation:animation forKey:nil];
} else {
self.glowViewShowFlag = @(NO); // 做动画
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
animation.fromValue = [NSNumber numberWithFloat:layer.opacity];
animation.toValue = @(.f); if (self.glowDuration != nil) {
animation.duration = self.glowDuration.floatValue;
layer.opacity = .f;
} else {
animation.duration = 0.8;
layer.opacity = .f;
} [layer addAnimation:animation forKey:nil];
}
}); dispatch_resume(self.dispatchSource);
}
}
}];
} - (void)glowToGlowLayerOnce {
[self.layer.sublayers enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
CALayer *layer = obj; // 找到了layer才进行下面的操作
if ([layer.name isEqualToString:GLOWVIEW_LAYER_FLAG]) {
// 做动画，从透明到显示出来
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
if (self.glowLayerOpacity != nil) {
animation.fromValue = @(.f);
animation.toValue = [NSNumber numberWithFloat:self.glowLayerOpacity.floatValue];
layer.opacity = self.glowLayerOpacity.floatValue;
} else {
animation.fromValue = @(.f);
animation.toValue = @(0.8f);
layer.opacity = 0.8;
} if (self.glowDuration != nil) {
animation.duration = self.glowDuration.floatValue;
} else {
animation.duration = 0.8;
}
[layer addAnimation:animation forKey:nil];
}
}];
} - (void)glowToNormalLayerOnce {
[self.layer.sublayers enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
CALayer *layer = obj; // 做动画
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"];
animation.fromValue = [NSNumber numberWithFloat:layer.opacity];
animation.toValue = @(.f); if (self.glowDuration != nil) {
animation.duration = self.glowDuration.floatValue;
layer.opacity = .f;
} else {
animation.duration = 0.8;
layer.opacity = .f;
} [layer addAnimation:animation forKey:nil];
}];
} @end
使用时候的源码：
//
// ViewController.m
// Glow
//
// Created by YouXianMing on 14/12/21.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
// #import "ViewController.h"
#import "UIView+GlowView.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad]; self.view.backgroundColor = [UIColor blackColor]; // 普通label
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
label.center = self.view.center;
label.font = [UIFont fontWithName:@"HelveticaNeue-UltraLight" size:.f];
label.textAlignment = NSTextAlignmentCenter;
label.text = @"YouXianMing";
label.textColor = [UIColor redColor]; label.GCDTimerInterval = @(.f);
label.glowDuration = @(.f);
label.glowLayerOpacity = @(0.8f); [label createGlowLayerWithColor:[UIColor yellowColor] glowRadius:.f];
[label startGlow]; [self.view addSubview:label]; } @end