Objective-C，避免显示负浮点值

Question

I have the following code :

float temp;
temp = 2.0f;
- (IBAction)MinusTouched:(id)sender {
    if (temp>0.0) {
        temp=temp-0.1f;
        [TempValue setText:[NSString stringWithFormat:@"%.1f",temp]];
    }
}

When i perform action by clicking on the button , temp value decreases. But it prints -0.0 after 0.1 , how can i trim the negative sign ? I mean i want an absolute float value.

Answer 1

在正面使用的fabs浮点负值

[TempValue setText:[NSString stringWithFormat:@"%.1f",fabs(temp)]];

Answer 2

尝试使用这种方法

fabs(temp)