NSDate到NSString錯誤

Question

我從我的服務器，我把一個NSDictionary recing 3字符串值。然後我將這些值傳遞給一個NSDateComponent之後我嘗試創建一個NSDateFormatter，我很確定這是錯誤的。

的日期甲應該是01月2014，我recive是這樣

{ 
Day @"1" 
Month @"4" 
Year @"2014" 
} 

在下面的代碼，你會看到我都試過，但是我是這樣做的數據在兩個區域遇到問題，格式化爲NSDateFormatter，其次我如何將日期傳遞到NSString中，以便我可以將其顯示在我的標籤中。

NSDateComponents *recivedDate = [[NSDateComponents alloc] init]; 
[recivedDate setDay:[[recivedData objectForKey:@"Day"] intValue]]; 
[recivedDate setMonth:[[recivedData objectForKey:@"Month"] intValue]]; 
[recivedDate setYear:[[recivedData objectForKey:@"Year"] intValue]]; 

NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; 
[formatter setDateFormat:@"dd-mm-yyy"]; 

NSString *dateString = [formatter stringFromDate:recivedDate]; 
dateResultLabel.text = dateString; 

任何幫助，將不勝感激。

Answer 1

你已經分叉日期組件好吧，但你沒有從它創建一個NSDate對象。 使用

NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar]; 
NSDate *date = [calendar dateFromComponents:recivedDate]; 

，然後使用我們的代碼，將其更改爲字符串

NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; 
[formatter setDateFormat:@"dd-MMM-yyy"]; 

NSString *dateString = [formatter stringFromDate:date]; 
dateResultLabel.text = dateString; 

PS：MMM應該給你月，而不是04

Answer 2

這可能會幫助你...

NSDictionary *testDict = [[NSDictionary alloc] init]; 
[testDict setValue:@"14" forKey:@"Day"]; 
[testDict setValue:@"4" forKey:@"Month"]; 
[testDict setValue:@"2014" forKey:@"Year"]; 


NSString *str = [[[NSString stringWithFormat:@"%@-",[testDict objectForKey:@"Day"]] stringByAppendingString:[NSString stringWithFormat:@"%@-",[testDict objectForKey:@"Month"]]] stringByAppendingString:[NSString stringWithFormat:@"%@",[testDict objectForKey:@"Year"]]]; 





NSDateFormatter * formatter = [NSDateFormatter new]; 
[formatter setDateFormat:@"dd-MM-yyyy"]; 


NSDateFormatter *formatter1 = [NSDateFormatter new]; 
[formatter1 setDateFormat:@"dd-MMM-yyyy"]; 


NSLog(@"%@",[formatter1 stringFromDate:[formatter dateFromString:str]]); 

Answer 3

NSString *str_date = [NSString stringWithFormat:@"%@-%@-%@",[recivedData objectForKey:@"Day"],[recivedData objectForKey:@"Month"],[recivedData objectForKey:@"Year"]]; 

NSDateFormatter* df = [[NSDateFormatter alloc] init]; 
[df setDateFormat:@"dd-MM-yyyy"]; 
NSDate* d = [df dateFromString:str_date]; 
NSLog(@"%@", d); 
[df release]; 

NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; 
[formatter setDateFormat:@"dd-MMMM-yyyy"]; 
NSString *stringFromDate = [formatter stringFromDate:d]; 
NSLog(@"%@",stringFromDate); 
[formatter release]; 

dateResultLabel.text = stringFromDate;