如何從NSString中提取前3個字符？

如何從NSString中提取前3個字符？如何從NSString中提取前3個字符？

例如，如果我有一個字符串「1234820」我如何從字符串中提取數字123並將結果存儲爲格式爲「1.23百萬」的新字符串？

我指望的字符串中的字符數用

-(NSString *)returnFormattedString:(NSString *)stringToFormat{ 


    NSString *formatedString; 
    NSUInteger characterCount = [stringToFormat length]; 
    if (characterCount > 6) { 
     //???? How do I extract and add a decimal 

     stringWithThreeCharactersAndDecimal = ????; 

     NSString *string = [NSString stringWithString:stringWithThreeCharactersAndDecimal]; 

    formatedString = [string stringByAppendingString:@"Million"]; 
    } 
return formatedString; 
}

來源

2016-03-21 Richard D

難道你不想要像[這樣]（http://stackoverflow.com/questions/11993806/convert-int-to-shortened-formatted-string）這是更通用的，因爲它不假設有7 -digits？ – Droppy

不喜歡

assume that is your String 
yourString = @"1234820"; 

// use substringToIndex for fetch First Three Character 
yourString=[yourString substringToIndex:3]; 

// finally convert string to as like 1.23 
NSString *finalStr = [NSString stringWithFormat:@"%.2f Million", [yourString floatValue]];

選擇-2

按Droppys短，很好的答案是

NSString *finalStr = [NSString stringWithFormat:@"%.2f Million", [yourString floatValue]/100.0f];

來源

2016-03-21 15:38:17

'[yourString floatValue]/100.0f'。真是一團糟。 – Droppy

@Droppy - 我同意你的答案，我們可以用多種方式做，只是等待 –

如何從NSString中提取前3個字符？

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