A great of the countdown widget, it is very convenient and easy to use.

How To Use

Using NSObject+JRCountDown category with Block style.

Just #import the NSObject+JRCountDown.h header, and call the jr_configureWithToFutureDate:intervaltTime:whileExecutingBlock:completionBlock: method, configure the while executing block and completion block. Everything will be handled for you.

#import <NSObject+JRCountDown.h>

...

- (IBAction)buttonClick:(UIButton *)sender {
    [[sender jr_configureWithCountDownTime:5.f intervalTime:1.f whileExecutingBlock:^(NSObject* selfInstance, CGFloat SurplusSec) {

        //do somethings, such as show the countdown on the button.

    } completionBlock:^(NSObject* selfInstance){
        
    	//you can set the sender state on this

    }] jr_start]; //method return the instance, you can call jr_start nethod to start at the same time.
}

Using NSObject+JRCountDown category with future time style.

you can uses the future date to the parameters, if more than present time, the jr_start method will not be executed.

#import <NSObject+JRCountDown.h>

...

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
    if(!cell){
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];
    }
    
    [[cell.textLabel jr_configureWithToFutureDate:self.dateArray[indexPath.row] intervaltTime:0.1f whileExecutingBlock:^(NSObject* selfInstance, CGFloat SurplusSec) {
        ((UILabel *)selfInstance).text = [NSString stringWithFormat:@"future time countdown %f second", SurplusSec];
    } completionBlock:^(NSObject* selfInstance){
        ((UILabel *)selfInstance).text = @"completion";
    }] jr_start];
    
    return cell;
}

Installation by cloning the repository

In order to gain access to all the files from the repository, you should clone it.

git clone --recursive https://github.com/JerrySir/JRCountDown.git

Future Enhancements

• None plan now,welcome any suggestion.

Licenses

All source code is licensed under the MIT License.