1.什麼是iconfont
iconFont拆開來看，就是 Icon + Font，這樣估計大家應該都能理解是什麼，那兩者結合是什麼呢？沒錯！就是 IconFont ！讓開發者像使用字型一樣使用圖示。如果自己不會做的話，可以直接去阿里的iconfont圖示庫下載自己需要的圖示。
2.為什麼要使用iconfont
在開發專案時，不可避免的會用到各種圖示，為了適配不同的裝置，通常需要@2x和@3x兩套圖，例如說我們tabBar上使用的圖示。有些app有換膚的需要，還需要多套不同的圖來進行匹配不同的主題。如果使用切圖，這對於設計和開發來說無疑是增加了工作量，而且ipa的體積也會增大。
使用iconfont的好處:
1. 減小ipa包的大小
2. 圖示保真縮放，多裝置適配一套圖解決問題
3. 適應換膚要求，使用方便。
複製程式碼3.怎麼用iconfont
1. 首先去iconfont圖示庫下載自己需要的圖示。
如圖我們可以選擇自己需要的icon加入到購物車，然後加入專案裡，當然你也可以直接在購物車直接下載，但是這樣只是沒有修改icon為自己想要的樣式，加入專案中，你可以自己任意修改icon為自己想要的樣式。
注意：這裡是下載程式碼，這樣我們就可以在專案中直接使用
2.將下載下來的icon資源新增到自己的專案中。
注意：勾選如圖選項
接下來配置專案載入這個檔案
- 檢查檔案是否在專案中，不然會崩潰
- 在plist檔案中加入字型
TBCityIconInfo.h的實現
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@interface TBCityIconInfo : NSObject
@property (nonatomic, strong) NSString *text;
@property (nonatomic, assign) NSInteger size;
@property (nonatomic, strong) UIColor *color;
- (instancetype)initWithText:(NSString *)text size:(NSInteger)size color:(UIColor *)color;
+ (instancetype)iconInfoWithText:(NSString *)text size:(NSInteger)size color:(UIColor *)color;
@end
複製程式碼TBCityIconInfo.m的實現
#import "TBCityIconInfo.h"
@implementation TBCityIconInfo
- (instancetype)initWithText:(NSString *)text size:(NSInteger)size color:(UIColor *)color {
if (self = [super init]) {
self.text = text;
self.size = size;
self.color = color;
}
return self;
}
+ (instancetype)iconInfoWithText:(NSString *)text size:(NSInteger)size color:(UIColor *)color {
return [[TBCityIconInfo alloc] initWithText:text size:size color:color];
}
@end
複製程式碼TBCityIconFont.h的實現
#import "UIImage+TBCityIconFont.h"
#import "TBCityIconInfo.h"
#define TBCityIconInfoMake(text, imageSize, imageColor) [TBCityIconInfo iconInfoWithText:text size:imageSize color:imageColor]
@interface TBCityIconFont : NSObject
+ (UIFont *)fontWithSize: (CGFloat)size;
+ (void)setFontName:(NSString *)fontName;
複製程式碼TBCityIconFont.m的實現
#import "TBCityIconFont.h"
#import <CoreText/CoreText.h>
@implementation TBCityIconFont
static NSString *_fontName;
+ (void)registerFontWithURL:(NSURL *)url {
NSAssert([[NSFileManager defaultManager] fileExistsAtPath:[url path]], @"Font file doesn't exist");
CGDataProviderRef fontDataProvider = CGDataProviderCreateWithURL((__bridge CFURLRef)url);
CGFontRef newFont = CGFontCreateWithDataProvider(fontDataProvider);
CGDataProviderRelease(fontDataProvider);
CTFontManagerRegisterGraphicsFont(newFont, nil);
CGFontRelease(newFont);
}
+ (UIFont *)fontWithSize:(CGFloat)size {
UIFont *font = [UIFont fontWithName:[self fontName] size:size];
if (font == nil) {
NSURL *fontFileUrl = [[NSBundle mainBundle] URLForResource:[self fontName] withExtension:@"ttf"];
[self registerFontWithURL: fontFileUrl];
font = [UIFont fontWithName:[self fontName] size:size];
NSAssert(font, @"UIFont object should not be nil, check if the font file is added to the application bundle and you're using the correct font name.");
}
return font;
}
+ (void)setFontName:(NSString *)fontName {
_fontName = fontName;
}
+ (NSString *)fontName {
return _fontName ? : @"iconfont";
}
@end
複製程式碼UIImage+TBCityIconFont.h的實現
#import <UIKit/UIKit.h>
#import "TBCityIconInfo.h"
@interface UIImage (TBCityIconFont)
+ (UIImage *)iconWithInfo:(TBCityIconInfo *)info;
@end
複製程式碼UIImage+TBCityIconFont.m的實現
#import "UIImage+TBCityIconFont.h"
#import "TBCityIconFont.h"
#import <CoreText/CoreText.h>
@implementation UIImage (TBCityIconFont)
+ (UIImage *)iconWithInfo:(TBCityIconInfo *)info {
CGFloat size = info.size;
CGFloat scale = [UIScreen mainScreen].scale;
CGFloat realSize = size * scale;
UIFont *font = [TBCityIconFont fontWithSize:realSize];
UIGraphicsBeginImageContext(CGSizeMake(realSize, realSize));
CGContextRef context = UIGraphicsGetCurrentContext();
if ([info.text respondsToSelector:@selector(drawAtPoint:withAttributes:)]) {
/**
* 如果這裡丟擲異常，請開啟斷點列表，右擊All Exceptions -> Edit Breakpoint -> All修改為Objective-C
* See: http://stackoverflow.com/questions/1163981/how-to-add-a-breakpoint-to-objc-exception-throw/14767076#14767076
*/
[info.text drawAtPoint:CGPointZero withAttributes:@{NSFontAttributeName:font, NSForegroundColorAttributeName: info.color}];
} else {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
CGContextSetFillColorWithColor(context, info.color.CGColor);
[info.text drawAtPoint:CGPointMake(0, 0) withFont:font];
#pragma clang pop
}
UIImage *image = [UIImage imageWithCGImage:UIGraphicsGetImageFromCurrentImageContext().CGImage scale:scale orientation:UIImageOrientationUp];
UIGraphicsEndImageContext();
return image;
}
@end
複製程式碼3.具體使用方法
1.在AppDelegate.m中，初始化iconfont
#import "AppDelegate.h"
#import "TBCityIconFont.h"
#import "ViewController.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
[TBCityIconFont setFontName:@"iconfont"];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:[ViewController new]];
self.window.rootViewController = nav;
[self.window makeKeyAndVisible];
return YES;
}
複製程式碼- 在
ViewController.m中實現
#import "ViewController.h"
#import "TBCityIconFont.h"
#import "UIImage+TBCityIconFont.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 100, 30, 30)];
[self.view addSubview:imageView];
//圖示編碼是，需要轉成\U0000e600
imageView.image = [UIImage iconWithInfo:TBCityIconInfoMake(@"\U0000e600", 30, [UIColor redColor])];
// button
UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
button.frame = CGRectMake(100, 150, 40, 40);
[self.view addSubview:button];
[button setImage:[UIImage iconWithInfo:TBCityIconInfoMake(@"\U0000e614", 40, [UIColor redColor])] forState:UIControlStateNormal];
// label,label可以將文字與圖示結合一起，直接用label的text屬性將圖示顯示出來
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, 200, 280, 40)];
[self.view addSubview:label];
label.font = [UIFont fontWithName:@"iconfont" size:15];//設定label的字型
label.text = @"在lable上顯示 \U0000e658";
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
複製程式碼結果如下圖所示：
注意： 1. 所用到的unicode編碼需要自己手動將&#xXXXX格式轉換成\UXXXXXXXX格式，例如//圖示編碼是，需要轉成\U0000e600 2. 所有需要的unicode編碼都可以在下載的iconfont資料夾中的.html檔案開啟檢視
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