iosobjective-ciphonefractions

Display fraction number in UILabel


I am working on the app in which I have to show fraction number on label.

NSMutableAttributedString   * hogan = [[NSMutableAttributedString alloc] initWithString:self.toValue];
  [hogan setAttributes:@{NSFontAttributeName:[UIFont fontWithName:@"DINPro-Bold" size:11.0]} range:NSMakeRange(9,6)];
  UILabel *fal = [[UILabel alloc] initWithFrame:CGRectMake(100,12, 150.0, 50)];
 fal.text = @"";
 fal.textColor = [UIColor whiteColor];

 fal.backgroundColor = [UIColor redColor];
  fal.font = [UIFont fontWithName:@"DINPro-Bold" size:18.0];



fal.attributedText=hogan;
[self addSubview:fal];

and the Output of this code is 1/5. I want to show like this ⅕.

I have tried with attribute string but it doesn't work.

Can anyone please help me.

Thanks in advance.


Solution

  • I have created the following two helper functions which will return the unicode string for a given number (0-9) in subscript or superscript format:

    -(NSString *)superscript:(int)num {
    
        NSDictionary *superscripts = @{@0: @"\u2070", @1: @"\u00B9", @2: @"\u00B2", @3: @"\u00B3", @4: @"\u2074", @5: @"\u2075", @6: @"\u2076", @7: @"\u2077", @8: @"\u2078", @9: @"\u2079"};
        return superscripts[@(num)];
    }
    
    -(NSString *)subscript:(int)num {
    
        NSDictionary *subscripts = @{@0: @"\u2080", @1: @"\u2081", @2: @"\u2082", @3: @"\u2083", @4: @"\u2084", @5: @"\u2085", @6: @"\u2086", @7: @"\u2087", @8: @"\u2088", @9: @"\u2089"};
        return subscripts[@(num)];
    }
    

    Once you have these declared, you can easily call something like this:

    NSLog(@"%@/%@", [self superscript:5], [self subscript:6]);
    

    Which would output the following:

    ⁵/₆

    And even a screenshot for ya from my normal UILabel:

    From the simulator

    EDIT

    Here's a function that will work with any fraction, including 37/100, for example:

    -(NSString *)fraction:(int)numerator denominator:(int)denominator {
    
        NSMutableString *result = [NSMutableString string];
    
        NSString *one = [NSString stringWithFormat:@"%i", numerator];
        for (int i = 0; i < one.length; i++) {
            [result appendString:[self superscript:[[one substringWithRange:NSMakeRange(i, 1)] intValue]]];
        }
        [result appendString:@"/"];
    
        NSString *two = [NSString stringWithFormat:@"%i", denominator];
        for (int i = 0; i < two.length; i++) {
            [result appendString:[self subscript:[[two substringWithRange:NSMakeRange(i, 1)] intValue]]];
        }
        return result;
    }
    

    Calling the following:

    NSLog(@"%@", [self fraction:37 denominator:100]);
    

    Logs ³⁷/₁₀₀.