格式编号为百分比

Question

我已编写此代码，我想将数字z格式化为百分比。

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

使您的代码如下。

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

Answer 2

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

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

NSNumber *number = [NSNumber numberWithFloat:0.435];

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

43,50％

Answer 3

您需要使用%%才能在格式字符串中打印百分号。