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104 lines
2.4 KiB
104 lines
2.4 KiB
9 years ago
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// CLPausableTimer.m
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// Clocker
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//
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// Created by Abhishek Banthia on 5/4/16.
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//
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//
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#import "CLPausableTimer.h"
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@implementation CLPausableTimer
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{
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NSDate *cycleStartDate;
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NSTimeInterval remainingInterval;
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BOOL hasPausedThisCycle;
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}
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+(CLPausableTimer *)timerWithTimeInterval:(NSTimeInterval)timeInterval target:(id)target selector:(SEL)selector userInfo:(id)userInfo repeats:(BOOL)repeats
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{
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CLPausableTimer *new = [[CLPausableTimer alloc] init];
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new.timeInterval = timeInterval;
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new.target = target;
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new.selector = selector;
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new.userInfo = userInfo;
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new.repeats = repeats;
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return new;
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}
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-(void)start
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{
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[self.timer invalidate];
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if(self.isPaused)
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{ //If resuming from a pause, use partial remaining time interval
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self.timer = [NSTimer scheduledTimerWithTimeInterval:remainingInterval target:self selector:@selector(timerFired:) userInfo:self.userInfo repeats:self.repeats];
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} else {
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self.timer = [NSTimer scheduledTimerWithTimeInterval:self.timeInterval target:self selector:@selector(timerFired:) userInfo:self.userInfo repeats:self.repeats];
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remainingInterval = self.timeInterval;
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}
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self.isPaused = NO;
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cycleStartDate = [NSDate date];
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}
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-(void)pause
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{
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if(self.isPaused) return;
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self.isPaused = YES;
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hasPausedThisCycle = YES;
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[self.timer invalidate];
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//keep track of time left on this cycle
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remainingInterval -= [[NSDate date] timeIntervalSinceDate:cycleStartDate];
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}
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-(void)timerFired:(NSTimer *)timer
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{
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if(self.isPaused) return;
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
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[self.target performSelector:self.selector withObject:self];
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#pragma clang diagnostic pop
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//reset remaining time to original value
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remainingInterval = self.timeInterval;
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cycleStartDate = [NSDate date];
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if(hasPausedThisCycle)
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{
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//current timer is running on remainingInterval
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//reset pause flag for next cycle
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hasPausedThisCycle = NO;
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if(self.repeats)
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{ //need to set up a new timer with original timeInterval
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[self.timer invalidate];
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[self start];
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}
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}
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}
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-(void)dealloc
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{
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[self.timer invalidate];
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self.timer = nil;
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self.selector = nil;
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self.target = nil;
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self.userInfo = nil;
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}
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@end
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