格式數量百分比

Question

我已經寫了這段代碼，我想將數字z格式化爲百分比。

float l = ([textField2.text floatValue]); 
float g = ([textField1.text floatValue]); 

float x = l/1.23; 
float y = x-g; 
float z = y/l; 

label.text = [[NSString alloc] initWithFormat:@"%2.2f \%",z]; 

Answer 1

您需要使用%%才能在格式字符串中打印百分號。

Answer 2

請按如下所示編寫代碼。

label.text = [[NSString alloc] initWithFormat:@"%2.2f %%",(z*100)]; 

Answer 3

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init]; 
[numberFormatter setNumberStyle:NSNumberFormatterPercentStyle]; 

[numberFormatter setMinimumFractionDigits:2]; //optional 
.... 

NSNumber *number = [NSNumber numberWithFloat:0.435]; 

NSLog(@"%@", [numberFormatter stringFromNumber:number]); 

43,50％