Formatting iOS numbers and formatting iOS numbers

Formatting iOS numbers and formatting iOS numbers

// You can also set the format of NSNumber output through NSNumberFormatter. For example, the following code: NSNumberFormatter * formatter = [[NSNumberFormatter alloc] init]; formatter. numberStyle = NSNumberFormatterDecimalStyle; NSString * string = [formatter stringFromNumber: [NSNumber numberWithInt: 123456789]; NSLog (@ "Formatted number string: % @", string ); // The output result is: [1223:403] Formatted number string: 123,456,789 // The NSNumberFormatter class has a property numberStyle, which is an enumeration type, you can set different values to output different numeric formats. This enumeration includes: typedef NS_ENUM (NSUInteger, NSNumberFormatterStyle) {NSNumberFormatterNoStyle = kCFNumberFormatterNoStyle, Signature = signature, Signature = signature, NSNumberFormatterPercentStyle = signature, Signature = delimiter, NSNumberFormatterSpellO UtStyle = kCFNumberFormatterSpellOutStyle}; // The output format of each enumeration is as follows: the output of the third and last entries varies depending on the language regions set by the system. [1243: 403] Formatted number string: 123456789 [1243: 403] Formatted number string: 123,456,789 [1243: 403] Formatted number string: ￥123,456,789.00 [1243: 403] Formatted number string: -539,222,988% [1243: 403] Formatted number string: 1.23456789E8 [1243: 403] Formatted number string: 0.1 billion 23,456,789