Code Quality Rank: L3
Programming language: Objective-C
License: MIT License
Tags: UI     Label    
Latest version: v0.5.5

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License Platforms Cocoapod Latest Version Carthage compatible Downloads with CocoaPods


MZTimerLabel is a UILabel subclass, which is a handy way to use UILabel as a countdown timer or stopwatch just like that in Apple Clock App with just 2 lines of code. MZTimerLabel also provides delegate method for you to define the action when the timer finished.

Author: MineS Chan and awesome contributors.

Remark: This is my first iOS plugin project on github, please accept my apologize if any bad coding.


  • ARC
  • iOS 5.0+



  1. Download or clone MZTimerLabel, add MZTimerLabel.h and MZTimerLabel.m source files into your project.
  2. #import "MZTimerLabel.h" whereever you need it.


(Unfamiliar with CocoaPods yet? It's a dependency management tool for iOS and Mac, check it out!)

pod 'MZTimerLabel'


Another dependency manager is Carthage, which does not have a centralized repository.

github "mineschan/MZTimerLabel"

Easy Example

To use MZTimerLabel as a stopwatch and counter, you need only 2 lines.

    MZTimerLabel *stopwatch = [[MZTimerLabel alloc] initWithLabel:aUILabel];
    [stopwatch start];

Easy? If you are looking for a timer, things is just similar.

    MZTimerLabel *timer = [[MZTimerLabel alloc] initWithLabel:aUILabel andTimerType:MZTimerLabelTypeTimer];
    [timer setCountDownTime:60];
    [timer start];

Now the timer will start counting from 60 to 0 ;)

Custom Appearance

As MZTimerLabel is a UILabel subclass, you can directly allocate it as a normal UILabel and customize timeLabel property just like usual.

    MZTimerLabel *redStopwatch = [[MZTimerLabel alloc] init];
    redStopwatch.frame = CGRectMake(100,50,100,20);
    redStopwatch.timeLabel.font = [UIFont systemFontOfSize:20.0f];
    redStopwatch.timeLabel.textColor = [UIColor redColor];
    [self.view addSubview:redStopwatch];
    [redStopwatch start];

MZTimerLabel uses 00:00:00 (HH:mm:ss) as time format, if you prefer using another format such as including milliseconds.Your can set your time format like below.

timerExample4.timeFormat = @"HH:mm:ss SS";

Control the timer

You can start,pause,reset your timer with your custom control, set your control up and call these methods:


Getter and Setters

You may control the time value and behaviours at the begining or during runtime with these properties and methods

@property (assign) BOOL shouldCountBeyondHHLimit;   //see example #12
@property (assign) BOOL resetTimerAfterFinish;      //see example #7

-(void)addTimeCountedByTime:(NSTimeInterval)timeToAdd; //see example #10, #11

And if you want to have information of the timer, here is how.

@property (assign,readonly) BOOL counting;  //see example #4-7

- (NSTimeInterval)getTimeCounted;    //see example #3
- (NSTimeInterval)getTimeRemaining;  //see example #3
- (NSTimeInterval)getCountDownTime;  

Timer Finish Handling

Usually when you need a timer, you need to deal with it after it finished. Following are 2 examples showing how to do it using delegate and block methods.


First, set the delegate of the timer label.

timer.delegate = self;

And then implement MZTimerLabelDelegate protocol in your dedicated class

@interface ViewController : UIViewController<MZTimerLabelDelegate>

Finally, implement the delegate method timerLabel:finshedCountDownTimerWithTimeWithTime:

 -(void)timerLabel:(MZTimerLabel*)timerLabel finshedCountDownTimerWithTime:(NSTimeInterval)countTime{
    //time is up, what should I do master?


Block is a very convenient way to handle the callbacks, MZTimerLabel makes your life even easier.

    MZTimerLabel *timer = [[MZTimerLabel alloc] initWithLabel:aUILabel andTimerType:MZTimerLabelTypeTimer];
    [timer3 setCountDownTime:60]; 
    [timer startWithEndingBlock:^(NSTimeInterval countTime) {
        //oh my gosh, it's awesome!!

Or set it seperately

    [timer3 setCountDownTime:60]; 
    timer.endedBlock = ^(NSTimeInterval countTime) {
        //oh my gosh, it's awesome!!
    [timer start];

More Examples

Please check the demo project I provided, with well explained example code inside.


This code is distributed under the terms and conditions of the [MIT license](LICENSE).

What's coming up next?

  1. Submit to CocaPods
  2. Better performance.
  3. Your suggestions!:D

*Note that all licence references and agreements mentioned in the MZTimerLabel README section above are relevant to that project's source code only.