NSDateFormatter，dateFromString 返回 nil

发布于 2024-12-29 13:53:59 字数 258 浏览 3 评论 0原文

添加此代码

NSDateFormatter *df = [[NSDateFormatter alloc]init];
NSString *entry = @"March 28, 2012";       
[df setDateFormat:@"yyyy-MM-dd"];     
NSDate *date = [df dateFromString:entry];

日期返回零值。我对输入日期字符串有疑问。是否可以将其转换为日期？

原文

Added this code

NSDateFormatter *df = [[NSDateFormatter alloc]init];
NSString *entry = @"March 28, 2012";       
[df setDateFormat:@"yyyy-MM-dd"];     
NSDate *date = [df dateFromString:entry];

The date returns nil value. I have doubt about the entry date string.Is it possible to convert this into date?

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君勿笑 2025-01-05 13:53:59

格式错误。请按如下操作。

NSDateFormatter *df = [[NSDateFormatter alloc]init];
NSString *entry = @"March 28, 2012";       
[df setDateFormat:@"MMMM dd, yyyy"];     
NSDate *date = [df dateFromString:entry];

编辑

[df setDateFormat:@"MMMM dd, yyyy HH:mm a"];

The format is wrong. Please do as following.

NSDateFormatter *df = [[NSDateFormatter alloc]init];
NSString *entry = @"March 28, 2012";       
[df setDateFormat:@"MMMM dd, yyyy"];     
NSDate *date = [df dateFromString:entry];

Edit

[df setDateFormat:@"MMMM dd, yyyy HH:mm a"];

回复收藏 0 原文

星軌x 2025-01-05 13:53:59

您的日期格式字符串和日期值字符串不匹配。

要么

NSDateFormatter *df = [[NSDateFormatter alloc]init];
NSString *entry = @"2012-03-28";    //Changed this   
[df setDateFormat:@"yyyy-MM-dd"];   //Kept it as yours  
NSDate *date = [df dateFromString:entry];

或

NSDateFormatter *df = [[NSDateFormatter alloc]init];
NSString *entry = @"March 28, 2012";   //Kept is as yours    
[df setDateFormat:@"MMMM dd, yyyy"];    //Changed it 
NSDate *date = [df dateFromString:entry];

Your date format string and date value string does not match.

Either

NSDateFormatter *df = [[NSDateFormatter alloc]init];
NSString *entry = @"2012-03-28";    //Changed this   
[df setDateFormat:@"yyyy-MM-dd"];   //Kept it as yours  
NSDate *date = [df dateFromString:entry];

NSDateFormatter *df = [[NSDateFormatter alloc]init];
NSString *entry = @"March 28, 2012";   //Kept is as yours    
[df setDateFormat:@"MMMM dd, yyyy"];    //Changed it 
NSDate *date = [df dateFromString:entry];

回复收藏 0 原文

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