UIBarButtonItem *allReadItem = [[UIBarButtonItem alloc] initWithTitle:@"全部已读" style:UIBarButtonItemStylePlain target:self action:@selector(allReadItemDidClicked:)];
[allReadItem setTitleTextAttributes:@{NSFontAttributeName : [UIFont pingFangSCWithSize:14], NSForegroundColorAttributeName : [UIColor colorWithHexString:@"#333333"]} forState:UIControlStateNormal];
self.navigationItem.rightBarButtonItem = allReadItem;

UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    btn.titleLabel.font = [UIFont pingFangSCWithSize:14];
    [btn setTitle:@"全部已读" forState:UIControlStateNormal];
    [btn setTitleColor:[UIColor colorWithHexString:@"#333333"] forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(allReadItemDidClicked:) forControlEvents:UIControlEventTouchUpInside];
    [btn sizeToFit]; //需要设置一下否则在iOS10会没有大小.
    UIBarButtonItem *allReadItem = [[UIBarButtonItem alloc] initWithCustomView:btn];
    self.navigationItem.rightBarButtonItem = allReadItem;

typedef NS_ENUM(NSInteger, UIApplicationState) {
    UIApplicationStateActive, //0
    UIApplicationStateInactive, //1
    UIApplicationStateBackground //2
} NS_ENUM_AVAILABLE_IOS(4_0);

+ (NSUInteger)getCachesSize {
    NSUInteger size = 0;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
    NSDirectoryEnumerator *fileEnumerator = [fileManager enumeratorAtPath:cachePath]; //枚举指定目录的所有文件包括文件夹.
    for (NSString *fileName in fileEnumerator) {
        if ([fileName isEqualToString:@"Snapshots"]) {  //"/Snapshots"是系统生成的,删了也会再自动创建,所以就不计算了.
            continue;
        }
        NSString *filePath = [cachePath stringByAppendingPathComponent:fileName];
        NSDictionary *attrs = [fileManager attributesOfItemAtPath:filePath error:nil];
//        NSLog(@"fileType:%@, fileName:%@", [attrs objectForKey:NSFileType], fileName);
//        NSLog(@"filePath:%@", filePath);
        size += [attrs fileSize];
    }
    return size;
}

+ (void)clearCachesWithCompletionHandler:(void(^)(void))completionHandler {
    
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        NSFileManager *fileManager = [NSFileManager defaultManager];
        NSString * cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
        NSDirectoryEnumerator *fileEnumerator = [fileManager enumeratorAtPath:cachePath];
        for (NSString *fileName in fileEnumerator) {
            if ([fileName isEqualToString:@"Snapshots"]) {
                continue;
            }
            NSString *filePath = [cachePath stringByAppendingPathComponent:fileName];
            BOOL removeRs = [fileManager removeItemAtPath:filePath error:nil];
            if (!removeRs) {
                NSDictionary *attrs = [fileManager attributesOfItemAtPath:filePath error:nil];
                DLog(@"移除文件失败:fileType:%@, fileName:%@", [attrs objectForKey:NSFileType], fileName);
            }
        }
        
        dispatch_async(dispatch_get_main_queue(), ^{
            if (completionHandler) {
                completionHandler();
            }
        });
    });
}

- (void)backgroundDoSomethings {
    UIApplication *application = [UIApplication performSelector:@selector(sharedApplication)];
    __block UIBackgroundTaskIdentifier bgTask = [application beginBackgroundTaskWithExpirationHandler:^{
        // Clean up any unfinished task business by marking where you
        // stopped or ending the task outright.
        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    }];
    
    // Start the long-running task and return immediately.
    [self doSomethingWithCompletionBlock:^{
        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    }];
}

- (void)doSomethingWithCompletionBlock:(void (^)(void))completion
{
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
       
        NSLog(@"开始睡");
        sleep(175); //200x 170√ 180x 175√
        NSLog(@"睡醒");
        
        if (completion) {
            completion();
        }
    });
}

@interface NSMutableArray (Tool)


/**
 数组去重添加单个元素

 @param anObject 被添加的元素
 @param filterBlk 过滤条件.element为原数组的元素,anObject为被添加的元素.
 */
- (void)addObject:(id)anObject filter:(BOOL (^)(id element, id anObject))filterBlk;


/**
 数组去重添加一个数组里的元素

 @param otherArray 被添加的数组
 @param filterBlk 过滤条件.element为原数组的元素,anObject为被添加的数组的元素.
 */
- (void)addObjectsFromArray:(NSArray *)otherArray filter:(BOOL (^)(id element, id anObject))filterBlk;

@end

@implementation NSMutableArray (Tool)

- (void)addObject:(id)anObject filter:(BOOL (^)(id, id))filterBlk
{
    if (anObject == nil) {
        return;
    }
    
    BOOL isExist = NO;
    for (id obj in self) {
        if (!filterBlk(obj, anObject)) {
            isExist = YES;
            break;
        }
    }
    
    if (!isExist) {
        [self addObject:anObject];
    }
}

- (void)addObjectsFromArray:(NSArray *)otherArray filter:(BOOL (^)(id, id))filterBlk
{
    if (otherArray.count == 0) {
        return;
    }
    
    for (id element in otherArray) {
        [self addObject:element filter:filterBlk];
    }
}

@end

NSMutableArray *mArr = [@[@"3", @"4", @"5", @"33", @"7"] mutableCopy];
[mArr addObject:@"57" filter:^BOOL(NSString *element, NSString *anObject) {
    return ![element isEqualToString:anObject]; //不等于其中任何一个元素才添加
}];
NSLog(@"%@", mArr);
    
NSArray *arr = @[@"1", @"2", @"3", @"13", @"7"];
[mArr addObjectsFromArray:arr filter:^BOOL(NSString *element, NSString *anObject) {
    return ![element isEqualToString:anObject]; //不等于其中任何一个元素才添加
}];
NSLog(@"%@", mArr);

- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self commonInit];
    }
    
    return self;
}

- (void)commonInit
{
    [self addObserver:self forKeyPath:@"enabled" options:NSKeyValueObservingOptionOld | NSKeyValueObservingOptionNew context:nil];
}

- (void)dealloc
{
    [self removeObserver:self forKeyPath:@"enabled"];
}

- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self commonInit];
    }
    
    return self;
}

- (void)commonInit
{
    _duration = 30;
    _autoCountDown = YES;
    _timerStartState = ZAECountDownButtonTimerStartStateFromBegining;
    [self addTarget:self action:@selector(buttonDidClicked:) forControlEvents:UIControlEventTouchUpInside];
    _activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
    [self addSubview:_activityView];
    _activityView.center = CGPointMake(self.bounds.size.width/2.0, self.bounds.size.height/2.0);
}