// Add it on the keyWindow if you're using an UINavigationBar
datePicker = [SSMaterialCalendarPicker initCalendarOn:[UIApplication sharedApplication].keyWindow withDelegate:self];

// If there's a fullscreen view, add it there
datePicker = [SSMaterialCalendarPicker initCalendarOn:self.view withDelegate:self];

// Set a Locale if you want to force the localization - otherwise, it uses the device's default locale
datePicker.forceLocale = [NSLocale localeWithLocaleIdentifier:@"pt_BR"];

// Set a warning message for disabled intervals. Default is "WARNING: Interval unavailable!"
datePicker.disabledIntervalWarning = @"Anfitrião indisponível neste período!";

// Set a calendar title. Default is "Select an Interval"
datePicker.calendarTitle = @"Selecione um Período";

// Set apply button title. Default is "Apply"
// OBS: this is hidden on single date mode
datePicker.okButtonText = @"Aplicar";

// Set a primary and a secondary color
datePicker.primaryColor = [UIColor colorWithRed:255/255.0f green:87/255.0f blue:34/255.0f alpha:1.0f];
datePicker.secondaryColor = [UIColor colorWithRed:244/255.0f green:81/255.0f blue:30/255.0f alpha:1.0f];

// Set disabled dates. Dates previous to the current date are disabled by default.
datePicker.disabledDates = @[[NSDate daysFromNow:arc4random_uniform(300)], [NSDate daysFromNow:arc4random_uniform(300)]];

// Set single date mode as YES, if needed
datePicker.singleDateMode = YES;

[datePicker showAnimated];

// .h code:
#import "SSMaterialCalendarPicker.h"
@interface ExampleViewController : UIViewController <SSMaterialCalendarPickerDelegate>

// .m code:
- (void)rangeSelectedWithStartDate:(NSDate *)startDate andEndDate:(NSDate *)endDate {
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setLocale:[NSLocale localeWithLocaleIdentifier:@"pt_BR"]];
    [formatter setDateFormat:@"EEEE, dd 'de' MMMM 'de' YYYY"];
    [self.startDateLabel setText:[NSString stringWithFormat:@"Entrada: %@", [formatter stringFromDate:startDate]]];
    [self.endDateLabel setText:[NSString stringWithFormat:@"Saída: %@", [formatter stringFromDate:endDate]]];
}