//
//  YYTimer.h
//  YYKit <https://github.com/ibireme/YYKit>
//
//  Created by ibireme on 15/2/7.
//  Copyright (c) 2015 ibireme.
//
//  This source code is licensed under the MIT-style license found in the
//  LICENSE file in the root directory of this source tree.
//

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

/**
 YYTimer is a thread-safe timer based on GCD. It has similar API with `NSTimer`.
 YYTimer object differ from NSTimer in a few ways:
 
 * It use GCD to produce timer tick, and won't be affected by runLoop.
 * It make a weak reference to the target, so it can avoid retain cycles.
 * It always fire on main thread.
 
 */
@interface YYTimer : NSObject

+ (YYTimer *)timerWithTimeInterval:(NSTimeInterval)interval
                            target:(id)target
                          selector:(SEL)selector
                           repeats:(BOOL)repeats;

- (instancetype)initWithFireTime:(NSTimeInterval)start
                        interval:(NSTimeInterval)interval
                          target:(id)target
                        selector:(SEL)selector
                         repeats:(BOOL)repeats NS_DESIGNATED_INITIALIZER;

@property (readonly) BOOL repeats;
@property (readonly) NSTimeInterval timeInterval;
@property (readonly, getter=isValid) BOOL valid;

- (void)invalidate;

- (void)fire;

@end

NS_ASSUME_NONNULL_END