最近项目需要用自己的字体，针对这个做一个记录。首先我们拿到字体库
比如这个格式的
1、先将字体库拖入到项目中，然后到 Target - Build Phases下，在下图中的两个地方将字体库文件进行添加（如果没有就添加上）
添加文件
2、去 Info.plist 中添加键值对，记住值一定是指定格式，就比如下图这个，需要将.tff也要加上（Fonts provided by application - 键）这里如果有多个字体就添加多个item.
添加键值
3、寻找字体库的特有名称，新加入字体库的名称并不一定是字体的名称，所以我们要确定真实的字体名称
（1）可以按照我这种方法，右键显示简介，查看全名，如下图
查看字体库名称
（2）第二种就是双击字体，安装在mac上，然后打开字体册进行查看
查看字体库名称
（3）第三种方法就是通过代码，将字体打印出来，去找你所安装的字体库，我没使用这种，找起来太慢了。
// 遍历所有字体
NSArray *familyNames = [[NSArray alloc] initWithArray:[UIFont familyNames]];
NSArray *fontNames;
NSInteger indFamily, indFont;
for (indFamily=0; indFamily<familyNames.count; indFamily++)
{
NSLog(@"Family name: %@", [familyNames objectAtIndex:indFamily]);
fontNames = [[NSArray alloc] initWithArray:
[UIFont fontNamesForFamilyName:
[familyNames objectAtIndex:indFamily]]];
for (indFont=0; indFont<[fontNames count]; ++indFont)
{
NSLog(@" Font name: %@", [fontNames objectAtIndex:indFont]);
}
}
4、怎么使用，如下：
self.label.font = [UIFont fontWithName:@"Post No Bills Colombo ExtraBold" size:22.0f];
添加字体库到这里就结束了.....
接下来讲一下文字闪烁的实现
1、首先创建一个继承UILable的类，方便后续使用，.h代码如下：
#import <UIKit/UIKit.h>
/** 拥有光晕扫过效果的Label */
@interface CLHaloLabel : UILabel
/** 光晕循环一次的持续时间，默认循环时间为3秒 */
@property (nonatomic, assign) CGFloat haloDuration;
/** 光晕宽度占Label宽度的百分比，默认0.5 */
@property (nonatomic, assign) CGFloat haloWidth;
/** 光晕颜色，默认白色 */
@property (nonatomic, strong) UIColor *haloColor;
/** 是否执行动画，默认为NO */
@property (nonatomic, assign, getter = isAnimated) BOOL animated;
@end
.m代码如下
#import "CLHaloLabel.h"
#import <CoreText/CoreText.h>
/** 默认光晕循环一次的持续时间 */
static const NSTimeInterval kHaloDuration = 3;
/** 默认光晕宽度 */
static const CGFloat kHaloWidth = 0.5f;
/** 默认光晕颜色 */
#define kHaloColor [UIColor whiteColor]
/** 光晕动画ID */
static NSString *const kAnimationKey = @"CLHaloLabelAnimation";
@interface CLHaloLabel ()
/** 文字层 */
@property (nonatomic, strong) CATextLayer *textLayer;
/** 动画步调 */
@property (nonatomic, copy) NSString *animationPacing;
/** 动画步调可选的选项
kCAMediaTimingFunctionLinear // 线性动画
kCAMediaTimingFunctionEaseIn // 快速进入动画
kCAMediaTimingFunctionEaseOut // 快速出来动画
kCAMediaTimingFunctionEaseInEaseOut // 快速进入出来动画
kCAMediaTimingFunctionDefault // 默认动画是curve动画，也就是曲线动画
*/
@end
@implementation CLHaloLabel
@synthesize animated = _animated;
#pragma mark - 初始化
/** 初始化方法，用于从代码中创建的类实例 */
- (instancetype)init
{
self = [super init];
if (self)
{
[self defaultInit];
}
return self;
}
/** 初始化方法，用于从代码中创建的类实例 */
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
[self defaultInit];
}
return self;
}
/** 初始化方法，用于从xib文件中载入的类实例 */
- (instancetype)initWithCoder:(NSCoder *)decoder
{
self = [super initWithCoder:decoder];
if (self)
{
[self defaultInit];
}
return self;
}
/** 默认的初始化方法 */
- (void)defaultInit
{
// 设置默认的光晕颜色、光晕持续时间、光晕宽度
_haloColor = kHaloColor;
_haloDuration = kHaloDuration;
_haloWidth = kHaloWidth;
_animationPacing = kCAMediaTimingFunctionEaseInEaseOut;
// 设置渐变层参数
CAGradientLayer *gradientLayer = (CAGradientLayer *)self.layer;
gradientLayer.backgroundColor = [super.textColor CGColor];
gradientLayer.startPoint = CGPointMake(-_haloWidth, 0);
gradientLayer.endPoint = CGPointMake(0, 0);
gradientLayer.colors = @[(id)[self.textColor CGColor],
(id)[self.haloColor CGColor],
(id)[self.textColor CGColor]];
// 设置文字层参数
self.textLayer = [CATextLayer layer];
self.textLayer.backgroundColor = [[UIColor clearColor] CGColor];
self.textLayer.contentsScale = [[UIScreen mainScreen] scale];
self.textLayer.rasterizationScale = [[UIScreen mainScreen] scale];
self.textLayer.frame = self.bounds;
self.textLayer.anchorPoint = CGPointZero;
// 设置Label参数，针对从xib文件中载入的Label，需要调用self的属性设置方法
[self setFont: super.font];
[self setTextAlignment: super.textAlignment];
[self setText: super.text];
[self setTextColor: super.textColor];
// 将文字层作为蒙层，覆盖到渐变层上
gradientLayer.mask = self.textLayer;
// 开启动画
self.animated = YES;
}
#pragma mark - 重载类方法
/** 重写Label的layer为渐变层 */
+ (Class)layerClass
{
return [CAGradientLayer class];
}
/** 停止重绘，使用文字层绘制 */
- (void)drawRect:(CGRect)rect {}
#pragma mark - 布局子层
- (void)layoutSublayersOfLayer:(CALayer *)layer
{
[super layoutSublayersOfLayer:layer];
self.textLayer.frame = self.layer.bounds;
}
#pragma mark - 属性
- (void)setFrame:(CGRect)frame
{
[super setFrame:frame];
[self setNeedsDisplay];
}
/** 光晕持续时间 */
- (void)setHaloDuration:(CGFloat)haloDuration
{
_haloDuration = haloDuration;
if(_animated)
{
[self stopAnimating];
[self startAnimating];
}
}
/** 光晕宽度 */
- (void)setHaloWidth:(CGFloat)haloWidth
{
_haloWidth = haloWidth;
CAGradientLayer *gradientLayer = (CAGradientLayer *)self.layer;
gradientLayer.startPoint = CGPointMake(-_haloWidth, 0);
if(_animated)
{
[self stopAnimating];
[self startAnimating];
}
}
/** 文字颜色 */
- (UIColor *)textColor
{
// 文字颜色为渐变层背景色
UIColor *textColor = [UIColor colorWithCGColor:self.layer.backgroundColor];
if (!textColor)
{
textColor = [super textColor];
}
return textColor;
}
- (void)setTextColor:(UIColor *)textColor
{
UIColor *haloColor = self.haloColor ? self.haloColor : kHaloColor;
// 重设渐变层背景色和渐变层颜色表
CAGradientLayer *gradientLayer = (CAGradientLayer *)self.layer;
gradientLayer.backgroundColor = [textColor CGColor];
gradientLayer.colors = @[(id)[textColor CGColor],
(id)[haloColor CGColor],
(id)[textColor CGColor]];
[self setNeedsDisplay];
}
/** 文字 */
- (NSString *)text
{
// 返回文字层文字
return self.textLayer.string;
}
- (void)setText:(NSString *)text
{
self.textLayer.string = text;
[self setNeedsDisplay];
}
/** 文字字体 */
- (UIFont *)font
{
CTFontRef ctFont = self.textLayer.font;
NSString *fontName = (__bridge_transfer NSString *)CTFontCopyName(ctFont, kCTFontPostScriptNameKey);
CGFloat fontSize = CTFontGetSize(ctFont);
return [UIFont fontWithName:fontName size:fontSize];
}
- (void)setFont:(UIFont *)font
{
CTFontRef fontRef = CTFontCreateWithName((__bridge CFStringRef)(font.fontName), font.pointSize, &CGAffineTransformIdentity);
self.textLayer.font = fontRef;
self.textLayer.fontSize = font.pointSize;
CFRelease(fontRef);
[self setNeedsDisplay];
}
/** 文字对齐方式 */
- (NSTextAlignment)textAlignment
{
return [self.class UITextAlignmentFromCAAlignment:self.textLayer.alignmentMode];
}
- (void)setTextAlignment:(NSTextAlignment)textAlignment
{
self.textLayer.alignmentMode = [self.class CAAlignmentFromUITextAlignment:textAlignment];
}
+ (NSString *)CAAlignmentFromUITextAlignment:(NSTextAlignment)textAlignment
{
switch (textAlignment) {
case NSTextAlignmentLeft: return kCAAlignmentLeft;
case NSTextAlignmentCenter: return kCAAlignmentCenter;
case NSTextAlignmentRight: return kCAAlignmentRight;
default: return kCAAlignmentNatural;
}
}
+ (NSTextAlignment)UITextAlignmentFromCAAlignment:(NSString *)alignment
{
if ([alignment isEqualToString:kCAAlignmentLeft]) return NSTextAlignmentLeft;
if ([alignment isEqualToString:kCAAlignmentCenter]) return NSTextAlignmentCenter;
if ([alignment isEqualToString:kCAAlignmentRight]) return NSTextAlignmentRight;
if ([alignment isEqualToString:kCAAlignmentNatural]) return NSTextAlignmentLeft;
return NSTextAlignmentLeft;
}
#pragma mark - 光晕动画
- (BOOL) isAnimated
{
return _animated;
}
- (void) setAnimated:(BOOL)animated
{
_animated = animated;
if (_animated)
[self startAnimating];
else
[self stopAnimating];
}
- (void)setHaloColor:(UIColor *)haloColor
{
_haloColor = haloColor;
CAGradientLayer *gradientLayer = (CAGradientLayer *)self.layer;
gradientLayer.colors = @[(id)[self.textColor CGColor],
(id)[self.haloColor CGColor],
(id)[self.textColor CGColor]];
[self setNeedsDisplay];
}
/** 开启动画 */
- (void)startAnimating
{
static NSString *gradientStartPointKey = @"startPoint";
static NSString *gradientEndPointKey = @"endPoint";
CAGradientLayer *gradientLayer = (CAGradientLayer *)self.layer;
if([gradientLayer animationForKey:kAnimationKey] == nil)
{
// 通过不断改变渐变的起止范围，来实现光晕效果
CABasicAnimation *startPointAnimation = [CABasicAnimation animationWithKeyPath:gradientStartPointKey];
startPointAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(1.0, 0)];
startPointAnimation.timingFunction = [CAMediaTimingFunction functionWithName:_animationPacing];
CABasicAnimation *endPointAnimation = [CABasicAnimation animationWithKeyPath:gradientEndPointKey];
endPointAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(1 + _haloWidth, 0)];
endPointAnimation.timingFunction = [CAMediaTimingFunction functionWithName:_animationPacing];
CAAnimationGroup *group = [CAAnimationGroup animation];
group.animations = @[startPointAnimation, endPointAnimation];
group.duration = _haloDuration;
group.timingFunction = [CAMediaTimingFunction functionWithName:_animationPacing];
group.repeatCount = HUGE_VALF;
[gradientLayer addAnimation:group forKey:kAnimationKey];
}
}
/** 结束动画 */
- (void)stopAnimating
{
CAGradientLayer *gradientLayer = (CAGradientLayer *)self.layer;
if([gradientLayer animationForKey:kAnimationKey])
[gradientLayer removeAnimationForKey:kAnimationKey];
}
2、具体怎么使用呢
// @property (weak, nonatomic) IBOutlet CLHaloLabel *nameL;// 闪烁文字
self.nameL.text = @"开机解锁";
self.nameL.textColor = [UIColor whiteColor];
self.nameL.haloColor = [UIColor blackColor];
self.nameL.textAlignment = NSTextAlignmentCenter;
self.nameL.font = [UIFont systemFontOfSize:22];
self.nameL.animated = YES;
哦了，到这里基本就完工了。附上demo地址，有需要进行下载。
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