Objective-C将Long和Float转换为String [英] Objective-c convert Long and float to String

问题描述

我需要在Objective-C中将两个数字转换为字符串.

I need to convert two numbers to string in Objective-C.

一个是长号，另一个是浮点数.

One is a long number and the other is a float.

我在互联网上搜索了一个解决方案，每个人都使用stringWithFormat:，但我无法使其正常工作.

I searched on the internet for a solution and everyone uses stringWithFormat: but I can't make it work.

我尝试

NSString *myString = [NSString stringWithFormat: @"%f", floatValue]

12345678.1234 ，并获得"12345678.00000" 作为输出

和

NSString *myString = [NSString stringWithFormat: @"%d", longValue]

有人可以告诉我如何正确使用stringWithFormat:吗?

Can somebody show me how to use stringWithFormat: correctly?

推荐答案

本文讨论如何使用各种格式的字符串将数字/对象转换为NSString实例:

This article discusses how to use various formatting strings to convert numbers/objects into NSString instances:

字符串编程指南:格式化字符串对象

使用此处指定的格式:

字符串编程指南:字符串格式说明符

想要浮动，

[NSString stringWithFormat:@"%1.6f", floatValue]

并持续很长时间:

[NSString stringWithFormat:@"%ld", longValue] // Use %lu for unsigned longs

但是说实话，有时使用NSNumber类会更容易:

But honestly, it's sometimes easier to just use the NSNumber class:

[[NSNumber numberWithFloat:floatValue] stringValue];
[[NSNumber numberWithLong:longValue] stringValue];

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