格式化浮点值以获取小数点前的数字 [英] Format a float value to get the digits before a decimal point

问题描述

在我的应用程序中，我有一个音乐播放器，播放音乐的时间长度为0:30秒。

然而，在UILabel中，我正在显示进度，因为它是一个浮动，标签显示，即14.765。

我会很感激，如果你能告诉我如何能让标签显示

0:14而不是14.765。

另外，如果能告诉我如何显示0： 04如果进度是4秒钟的话。

解决方案

  float time = 14.765; 
 
 int mins = time / 60; 
 int secs = time-（mins * 60）; 
 
 NSString * display = [NSString stringWithFormat：@％d：％02d，mins，secs]; 
  

结果：

  14.765 => 0:14 
 30.000 => 0:30 
 59.765 => 0:59 
 105.999 => 1:45 
  

编辑

此外，单行：

 浮动时间= 14.765; 
 NSString * display = [NSString stringWithFormat：@％d：％02d，（int）time / 60，（int）time％60]; 
  

In my application I have a music player, which plays music with a length of 0:30 seconds.

However in a UILabel I am currently displaying the progress, and as it is a float, the label is displaying i.e 14.765.

I would appreciate it if you could tell me how I could get the label to display

0:14 rather than 14.765.

Also, I would appreciate it if you could tell me how I could display 0:04 if the progress was 4seconds in.

解决方案

This works properly:

float time = 14.765;

int mins = time/60;
int secs = time-(mins*60);

NSString * display = [NSString stringWithFormat:@"%d:%02d",mins,secs];

Results:

 14.765 => 0:14
 30.000 => 0:30
 59.765 => 0:59
105.999 => 1:45

EDIT

In addition the 'one liner':

float time = 14.765;
NSString * display = [NSString stringWithFormat:@"%d:%02d",(int)time/60,(int)time%60];  

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