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やあみんな別の質問！

もう一度言いたいのですが、私はこれに慣れていないため、ObjectiveC言語とXcodeアプリケーションを理解する能力が制限されています。だからあなたの助けは本当にそして本当に大いに感謝されます！

ラジオ局がいつライブになるかを示すカウントダウンアプリを作成しました。カウントダウンは完全に機能し、1秒に1回リアルタイムで更新されます。次に、それを「If-Statement」に挿入して、ラジオ局の開始日に到着するとカウントダウンは消えますが、カウントダウンはリアルタイムで更新されず、静的なままです。

以下は私のコードです：

- (void)viewDidAppear:(BOOL)animated {

        self.today = [NSDate date];
        NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
        [dateformatter setDateFormat:@"MM/dd/yyyy hh:mm:ss"];

        NSString *launchDay = [[NSString alloc] initWithString:@"11/26/2010 11:59:59"];
        NSDate *currentDate = [dateformatter dateFromString:launchDay];

        NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
        int unitFlags = NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
        NSDateComponents *components = [gregorian components:unitFlags fromDate:today toDate:currentDate options:0];


        if ([today timeIntervalSinceDate:currentDate] <= 0 ){   
                    self.today = [NSDate date];
        NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
        [dateformatter setDateFormat:@"MM/dd/yyyy hh:mm:ss"];
        countdownLabel.text = [NSString stringWithFormat:@"%02d:%02d:%02d:%02d", components.day, components.hour, components.minute, components.second ];
            self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateLabel) userInfo:nil repeats:YES];
        [self updateLabel]; 
        days.text = @"Days";
        hours.text = @"Hours";
        mins.text = @"Mins";
        secs.text = @"Secs";
        until.text = @"Until XtremeFM Launch!";
    }

    else {
        countdownLabel.text =@"XtremeFM is LIVE";

    }
}

みんな助けてくれて大歓迎です。誰かが私を助けてくれることを本当に願っています！

みんなありがとう、フィル

これがホーム画面の.Mファイル全体のコードです

#import "XtremeFMViewController.h"

@implementation XtremeFMViewController



/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
        // Custom initialization
    }
    return self;
}
*/

/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/



@synthesize countdownLabel, today, timer, todayDate, days, hours, mins, secs, until;


-(void)updateLabel {
    self.today = [NSDate date];
    NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
    [dateformatter setDateFormat:@"MM/dd/yyyy hh:mm:ss"];

    //NSString *launchDay = [[NSString alloc] initWithString:@"11/26/2010 11:59:59"];
    //NSDate *currentDate = [dateformatter dateFromString:launchDay];

    //NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    //int unitFlags = NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
    //NSDateComponents *components = [gregorian components:unitFlags fromDate:today toDate:currentDate options:0];


}

    - (void)viewDidAppear:(BOOL)animated {

        self.today = [NSDate date];
        NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
        [dateformatter setDateFormat:@"MM/dd/yyyy hh:mm:ss"];

        NSString *fathersDay = [[NSString alloc] initWithString:@"11/26/2010 11:59:59"];
        NSDate *currentDate = [dateformatter dateFromString:fathersDay];

        NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
        int unitFlags = NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
        NSDateComponents *components = [gregorian components:unitFlags fromDate:today toDate:currentDate options:0];


        if ([today timeIntervalSinceDate:currentDate] <= 0 ){   
                    self.today = [NSDate date];
        NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
        [dateformatter setDateFormat:@"MM/dd/yyyy hh:mm:ss"];
        countdownLabel.text = [NSString stringWithFormat:@"%02d:%02d:%02d:%02d", components.day, components.hour, components.minute, components.second ];
            self.timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateLabel) userInfo:nil repeats:YES];
        [self updateLabel]; 
        days.text = @"Days";
        hours.text = @"Hours";
        mins.text = @"Mins";
        secs.text = @"Secs";
        until.text = @"Until XtremeFM Launch!";
    }

    else {
        countdownLabel.text =@"XtremeFM is LIVE";

    }
}


- (IBAction)watchLive { 

    self.today = [NSDate date];
    NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
    [dateformatter setDateFormat:@"MM/dd/yyyy hh:mm:ss"];
    NSString *launchDay = [[NSString alloc] initWithString:@"11/26/2010 11:59:00"];
    NSDate *currentDate = [dateformatter dateFromString:launchDay];

    //NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    //int unitFlags = NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
    //NSDateComponents *components = [gregorian components:unitFlags fromDate:today toDate:currentDate options:0];
    //countdownLabel.text = [NSString stringWithFormat:@"%02d:%02d:%02d:%02d", components.day, components.hour, components.minute, components.second ];



    if ([today timeIntervalSinceDate:currentDate] >= 0 ){

        NSString *webpage = @"http://xphiltestpagex.is.livestream-api.com/livestreamiphone/philtestpage/playlist.m3u8";
        NSURL *nswebpage = [NSURL URLWithString:webpage];
        NSURLRequest *nsurl = [NSURLRequest requestWithURL:nswebpage];
        [webView loadRequest:nsurl];

    }
    else {

        UIAlertView*alert = [[UIAlertView alloc] initWithTitle:@"Coming Soon" message:@"Feed goes live Friday 26th November 12:00pm" delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
        [alert show];
        [alert release];
    }


}

-(IBAction)requestsPage {
    RequestsPageViewController *move = [[RequestsPageViewController alloc]initWithNibName:nil bundle:nil];
    move.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
    [self presentModalViewController:move animated:YES];
    [move release];
}

-(IBAction)twitterButton {
    RequestsPageViewController *move = [[RequestsPageViewController alloc]initWithNibName:nil bundle:nil];
    move.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
    [self presentModalViewController:move animated:YES];
    [move release];
}


/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [super dealloc];
}

@end

（BOOL）アニメーションを作成しましたViewDidAppearが、これをifステートメント（Noob）に追加する方法がわかりません。

4

1 に答える 1

0

NSLog() は、条件を正しく起動しないものを追跡するのに非常に貴重です。

の直前に、次のようif()に移動します。

NSLog(@"%d", [today timeIntervalSinceDate:currentDate]);

そして、コンソールに何が表示されるかを見てください。

私がこの種のことを台無しにしてしまったのは、間違った順序で値をテストすることです.

また、そのコードで割り当てたほとんどすべてをリークしています。戻って、releaseあなたが好きなすべてalloc！

于 2010-08-25T19:59:01.603 に答える