NSTimer reverse count
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Hello! Show me how to do it. There are 3 pickerView: number of repetitions, time of work, time of rest. We need a timer. Reverse count and displayed in the label. I can't start counting from the selected value and stop when 0 and start the report of the second chosen value and reduce the number of repeats by 1. In principle, with the number of repetitions, I understand what can be done in the cycle. But I can't figure it out.
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Something like that.
#import "ViewController.h" #import "MSWeakTimer.h"@interface ViewController () <UIPickerViewDataSource,UIPickerViewDelegate>
@property (strong, nonatomic) IBOutletCollection(UIPickerView) NSArray *pickerView;
@property (weak, nonatomic) IBOutlet UILabel *timeWorkText;
@property (weak, nonatomic) IBOutlet UILabel *timeRestText;
@property (weak, nonatomic) IBOutlet UILabel *roundText;@property (strong,nonatomic) NSArray * rounds;
@property (strong,nonatomic) NSArray * timeWork;
@property (strong,nonatomic) NSArray * timeRest;@property (strong, nonatomic) MSWeakTimer *timer;
@property (strong, nonatomic) MSWeakTimer *backgroundTimer;@property (strong, nonatomic) dispatch_queue_t privateQueue;
@property (nonatomic) int roundsCount;
@property (nonatomic) int timeWorkCount;
@property (nonatomic) int timeRestCount;
@property (nonatomic) BOOL isWorking;
@property (nonatomic) int countDown;@end
@implementation ViewController
static const char *MSSampleViewControllerTimerQueueContext = "MSSampleViewControllerTimerQueueContext";
@synthesize
pickerView = _pickerView;-
(id)init
{
if ((self = [super init]))
{
self.privateQueue = dispatch_queue_create("com.mindsnacks.private_queue", DISPATCH_QUEUE_CONCURRENT);self.backgroundTimer = [MSWeakTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(backgroundTimerDidFire) userInfo:nil repeats:YES dispatchQueue:self.privateQueue]; dispatch_queue_set_specific(self.privateQueue, (__bridge const void *)(self), (void *)MSSampleViewControllerTimerQueueContext, NULL);}
return self;
} -
(void)dealloc
{
[_timer invalidate];
[_backgroundTimer invalidate];
} -
(void)viewDidLoad {
[super viewDidLoad];self.roundsCount = 1;
//rounds
NSMutableArray *mutableArrayRounds = [[NSMutableArray alloc] init];for (int rounds = 1; rounds < 16; rounds++) {
[mutableArrayRounds addObject:[NSString stringWithFormat:@"%d",rounds]];}
self.rounds = [NSArray arrayWithArray:mutableArrayRounds];//TimeRest
NSMutableArray *mutableArrayTimeRest = [[NSMutableArray alloc] init];
for (int min = 0; min < 6; min++)
for (int sec = 0; sec < 60; sec++)
{[mutableArrayTimeRest addObject:[NSString stringWithFormat:@"%d : %d",min, sec]]; }self.timeRest = [NSArray arrayWithArray:mutableArrayTimeRest];
//TimeWork
NSMutableArray *mutableArrayTimeWork = [[NSMutableArray alloc] init];
for (int min = 0; min < 6; min++)
for (int sec = 0; sec < 60; sec++)
{[mutableArrayTimeWork addObject:[NSString stringWithFormat:@"%d : %d", min, sec]]; }self.timeWork = [NSArray arrayWithArray:mutableArrayTimeWork];
}
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(void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
} -
(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return 1;
}
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(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
NSInteger title = 0;
if (pickerView.tag == 1) {
title = [self.rounds count];
}
if (pickerView.tag == 2) {
title =[self.timeRest count];
}
if (pickerView.tag == 3) {
title =[self.timeWork count];}
return title;
} -
(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
NSString * titleRow;
if (pickerView.tag == 1) {
titleRow = [self.rounds objectAtIndex:row];
}
if (pickerView.tag == 2) {
titleRow = [self.timeRest objectAtIndex:row];
}
if (pickerView.tag == 3) {
titleRow = [self.timeWork objectAtIndex:row];
}return titleRow;
} -
(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if (pickerView.tag == 1) {
self.roundsCount = [[self.rounds objectAtIndex:row] integerValue];
}
if (pickerView.tag == 2) {
self.timeWorkCount = [self convertTime:[self.timeRest objectAtIndex:row]];
}
if (pickerView.tag == 3) {
self.timeRestCount = [self convertTime:[self.timeWork objectAtIndex:row] ];
}
}
#pragma mark actions
- (IBAction)cancelButtonPressed:(id)sender {
self.roundText.text = 0;
self.timeWorkText.text = 0;
self.timeRestText.text = 0;
}
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(IBAction)goButtonPressed:(id)sender {
{
static NSString *kStopTimerText = @"Stop";
static NSString *kStartTimerText = @"Start";NSString *currentTitle = [sender titleForState:UIControlStateNormal]; if ([currentTitle isEqualToString:kStopTimerText]) { [sender setTitle:kStartTimerText forState:UIControlStateNormal]; [self.timer invalidate]; } else { self.roundText.text = [NSString stringWithFormat:@"%i", self.roundsCount]; self.isWorking = YES; self.countDown = self.timeWorkCount; [sender setTitle:kStopTimerText forState:UIControlStateNormal]; self.timer = [MSWeakTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(mainThreadTimerDidFire:) userInfo:nil repeats:YES dispatchQueue:dispatch_get_main_queue()]; }}
}
- (int)convertTime:(NSString*)time
{
NSLog(@"time %@", time);
long minutes = [[time substringToIndex:1] integerValue];
long seconds = [[time substringFromIndex:3] integerValue];
return minutes*60+seconds;
}
#pragma mark - mainThreadTimer
-
(void)mainThreadTimerDidFire:(MSWeakTimer *)timer
{
NSAssert([NSThread isMainThread], @"This should be called from the main thread");self.countDown--;
if(self.isWorking) {
self.timeWorkText.text = [NSString stringWithFormat:@"%i", self.countDown];
} else {
self.timeRestText.text = [NSString stringWithFormat:@"%i", self.countDown];
}if(self.countDown <= 0) {
if(self.isWorking) {
self.isWorking = NO;
self.countDown = self.timeRestCount;
} else {
self.roundsCount--;
self.roundText.text = [NSString stringWithFormat:@"%i", self.roundsCount];
if(self.roundsCount <= 0) {
[self.timer invalidate];
return;
}
self.isWorking = YES;
self.countDown = self.timeWorkCount;
}
}
}
#pragma mark backgroundTimer
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(void)backgroundTimerDidFire
{
NSAssert(![NSThread isMainThread], @"This shouldn't be called from the main thread");const BOOL calledInPrivateQueue = dispatch_queue_get_specific(self.privateQueue, (__bridge const void *)(self)) == MSSampleViewControllerTimerQueueContext;
NSAssert(calledInPrivateQueue, @"This should be called on the provided queue");
}
@end
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