将字符串转换为浮点数在Objective-C中 [英] Convert string to float in Objective-C

问题描述

如何在Objective-C中将字符串转换为浮点数?

How do I convert a string to a float in Objective-C?

我正在尝试乘以从JSON返回的几个字符串:

I am trying to multiply a couple of strings I am getting back from JSON:

float subTotal = [[[[purchaseOrderItemsJSON objectAtIndex:i] objectAtIndex:j] objectForKey:@"Price"] floatValue];

NSLog(@"%@",subTotal);

这给了我:(null)在控制台中.我知道该数组中有一个有效的字符串，因为我已经使用它在标签中显示其值了.

This gives me: (null) in the console. I know that there is a valid string coming out of that array because I am already using it to display its value in a label.

推荐答案

your_float = [your_string floatValue];

尝试一下:

  NSLog(@"float value is: %f", your_float);

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