Question

我一直在努力将nsstring转换为nsdate格式。我有一个nsstring格式的日期，如（2011-08-25 18:30:00 +0000），但我想以nsdate格式（08/26/2011）更改它。怎么改呢？有人能帮帮我吗？在此先感谢...我花了一天时间来解决这个问题，但我找不到解决方案..请帮助我的朋友....

这是我的代码，

    NSString *dateString = @"2011-08-25 18:30:00 +0000";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"MM/dd/yyyy"];
NSDate *dateFromString = [[NSDate alloc] init];
dateFromString = [dateFormatter dateFromString:dateString];
NSLog(@"Converted date is %@",dateFromString);

输出是，

         Converted date is (null)

Yuva.M

Answer 1

NSString *dateWithInitialFormat = @"2011-08-25 18:30:00 +0000";

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss Z"];
NSDate *date = [dateFormatter dateFromString:dateWithInitialFormat];

[dateFormatter setDateFormat:@"MM/dd/yyyy"];
NSString *dateWithNewFormat = [dateFormatter stringFromDate:date];
NSLog(@"dateWithNewFormat: %@", dateWithNewFormat);

来自NSLog：dateWithNewFormat：08/25/2011

请参阅Date Format Patterns

Answer 2

您需要使用NSDateFormatter并设置日期格式以匹配您的存储方式，如下所示。

NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:@"yyyy-MM-dd hh:mm:ss"];
NSDate *myDate = [df dateFromString: myDateString];

Answer 3

NSDateFormatter* df = [[NSDateFormatter alloc] init];
    [df setDateFormat:@"MMMM dd, yyyy"];
    NSDate* d = [df dateFromString:@"January 06, 1992"];
    NSLog(@"%@", d);

    NSDate *dispalyDate = d;
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"dd MMM"];
    NSString *str = [dateFormat stringFromDate:dispalyDate];
    NSLog(@"%@", str);

如何在iphone中将nsstring更改为nsdate格式？

3 个答案: