基于dispatch_after封装YXTimer

基于dispatch_after封装YXTimer

本人根据dispatch_after封装了一个定时器，支持block以及代理的方式来激活定时器，适用于对精度要求低，耗时短的地方，高端大气上档次，低调奢华有内涵:)

源码：

YXTimer.h 与 YXTimer.m

//

//  YXTimer.h

//  YXTimer

//

//  Created by YouXianMing on 14-10-2.

//  Copyright (c) 2014年 YouXianMing. All rights reserved.

//

#import <Foundation/Foundation.h>

@class YXTimer;

@protocol YXTimerDelegete <NSObject>

- (void)YXTimerEvent:(YXTimer *)timer;

@end

@interface YXTimer : NSObject

// 代理相关方法

@property (nonatomic) NSTimeInterval              milliSecond; // 毫秒

@property (nonatomic, assign) id<YXTimerDelegete> delegate;

// block相关方法

+ (instancetype)timerWithMilliSecondInterval:(NSTimeInterval)milliSecond

                                       Block:(void (^)(YXTimer *timer))block;

// 激活定时器 + 停止定时器

- (void)start;

- (void)stop; // 注意：要想让timer能被移除，一定要激活stop方法才行

@end

//

//  YXTimer.m

//  YXTimer

//

//  Created by YouXianMing on 14-10-2.

//  Copyright (c) 2014年 YouXianMing. All rights reserved.

//

#ifdef DEBUG

#define YXTimer_DLog(fmt, ...) NSLog((@"YXTimer.m:%s:%d" fmt), __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__);

#else

#define YXTimer_DLog(...)

#endif

#import "YXTimer.h"

@interface YXTimer ()

@property (nonatomic) BOOL isRunning;

@property (nonatomic, copy) void (^block)(YXTimer *timer);

@end

@implementation YXTimer

- (instancetype)init

{

    self = [super init];

    if (self) {

        _isRunning = NO;

    }

    return self;

}

- (instancetype)initWithBlock:(void (^)(YXTimer *timer))block {

    self = [super init];

    if (self) {

        _isRunning = NO;

        _block     = block;

    }

    return self;

}

- (void)start {

    _isRunning = YES;

    [self runTimer];

}

- (void)stop {

    _isRunning = NO;

}

+ (instancetype)timerWithMilliSecondInterval:(NSTimeInterval)milliSecond

                                       Block:(void (^)(YXTimer *timer))block {

    YXTimer *timer = [[YXTimer alloc] initWithBlock:block];

    timer.milliSecond = milliSecond;

    return timer;

}

- (void)runTimer {

    if (self.isRunning) {

        NSTimeInterval  milliSecond = .f;

        if (_milliSecond > ) {

            milliSecond = _milliSecond;

        }

        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(milliSecond * NSEC_PER_MSEC)), dispatch_get_main_queue(), ^{

            if (self.block) {

                self.block(self);

            }

            if (_delegate) {

                [_delegate YXTimerEvent:self];

            }

            [self runTimer];

        });

    }

}

- (void)dealloc {

    [self stop];

    YXTimer_DLog(@"资源释放了");

}

@end

使用源码：

//

//  ViewController.m

//  YXTimer

//

//  Created by YouXianMing on 14-10-2.

//  Copyright (c) 2014年 YouXianMing. All rights reserved.

//

#import "ViewController.h"

#import "YXTimer.h"

@interface ViewController ()<YXTimerDelegete>

@property (nonatomic, strong) YXTimer   *timer;

@property (nonatomic, strong) UILabel   *label;

@property (nonatomic, strong) NSArray   *dataArray;

@property (nonatomic)         NSInteger  count;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    _dataArray = @[@"Y.X. Loading .",

                   @"Y.X. Loading ..",

                   @"Y.X. Loading ...",

                   @"Y.X. Loading ....",

                   @"Y.X. Loading .....",

                   @"Y.X. Loading ......",

                   @"Y.X. Loading ......."];

    _timer             = [YXTimer new];

    _timer.milliSecond = ;

    _timer.delegate    = self;

    [_timer start];

    _label = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];

    _label.textAlignment = NSTextAlignmentLeft;

    _label.font = [UIFont fontWithName:@"HelveticaNeue-Thin" size:.f];

    _label.textColor = [UIColor redColor];

    _label.center = self.view.center;

    [self.view addSubview:_label];

}

- (void)YXTimerEvent:(YXTimer *)timer

{

    _label.text = _dataArray[_count++ % _dataArray.count];

}

@end

需要注意的地方：