iOS之NSDate的使用

最新推荐文章于 2022-12-09 18:23:27 发布

原创最新推荐文章于 2022-12-09 18:23:27 发布 · 897 阅读

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#iOS #NSDate

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本文介绍了一个简单的iOS应用开发实例，该应用能够显示当前请求的时间、支付请求时间、当前时间、过去的日期及未来的日期。通过使用Objective-C语言和相关日期格式化框架，实现了对日期和时间的灵活展示。

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@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    
    
    UILabel* label1 = [[UILabel alloc] initWithFrame:CGRectMake(30, 30, 320, 30)];
    label1.text = [self getNowRequestTime];
    label1.textColor = [UIColor blackColor];
    label1.font = [UIFont systemFontOfSize:20];
    [self.view addSubview:label1];
    
    UILabel* label2 = [[UILabel alloc] initWithFrame:CGRectMake(30, 80, 320, 30)];
    label2.text = [self getNowPayRequestTime];
    label2.textColor = [UIColor blackColor];
    label2.font = [UIFont systemFontOfSize:20];
    [self.view addSubview:label2];
    
    UILabel* label3 = [[UILabel alloc] initWithFrame:CGRectMake(30, 130, 320, 30)];
    label3.text = [self getNowTime];
    label3.textColor = [UIColor blackColor];
    label3.font = [UIFont systemFontOfSize:20];
    [self.view addSubview:label3];
    
//    UILabel* label4 = [[UILabel alloc] initWithFrame:CGRectMake(30, 30, 320, 30)];
//    label4.text = [self getPriousorLaterDateFromDate];
//    label4.textColor = [UIColor blackColor];
//    label4.font = [UIFont systemFontOfSize:20];
//    [self.view addSubview:label4];
    
    UILabel* label5 = [[UILabel alloc] initWithFrame:CGRectMake(30, 180, 320, 30)];
    label5.text = [self getDate];
    label5.textColor = [UIColor blackColor];
    label5.font = [UIFont systemFontOfSize:20];
    [self.view addSubview:label5];
    
}

-(NSString *)getNowRequestTime
{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSTimeZone* localzone = [NSTimeZone localTimeZone];
    [dateFormatter setTimeZone:localzone];
    
    NSDate *date = [NSDate date];
    NSString *text = [dateFormatter stringFromDate:date];
    return text;
}

-(NSString *)getNowPayRequestTime
{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyyMMddHHmmss"];
    NSTimeZone* localzone = [NSTimeZone localTimeZone];
    [dateFormatter setTimeZone:localzone];
    
    NSDate *date = [NSDate date];
    NSString *text = [dateFormatter stringFromDate:date];
    return text;
    
}

-(NSString *)getNowTime
{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyy-MM-dd"];
    NSTimeZone* localzone = [NSTimeZone localTimeZone];
    [dateFormatter setTimeZone:localzone];
    
    NSDate *date = [NSDate date];
    NSString *text = [dateFormatter stringFromDate:date];
    return text;
}

-(NSString *)getPriousorLaterDateFromDate:(NSDate *)date withMonth:(int)month
{
    NSDateComponents *comps = [[NSDateComponents alloc] init];
    [comps setMonth:month];
    NSCalendar *calender = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSDate *mDate = [calender dateByAddingComponents:comps toDate:date options:0];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd"];
    NSString *PriousorLaterDateString=[formatter stringFromDate: mDate];
    return PriousorLaterDateString;
}

-(NSString *)getDate
{
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd"];
    NSString *locationString=[formatter stringFromDate: [NSDate date]];
    return locationString;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end