World Clock Exact TimeTime clock Exact time
- Over 5000 towns from all over the world with up-to-date time information. - Organize your favourites according to your preferences to see the times for the most frequently displayed places. - Get the right time for every place in the world with time zones information. - The time is synchronised within the application to show the right time from timeanddate.com.
- Automatic update of summer time changes and all other time zones changes occurring worldwide. - Pick from a wide range of analogue clock themes and types of displays - analogue, digitial or text. - There are 24-hour clock and 12-hour clock format options. - Use this option to view the date and time differences in the Favorites tab.
Timeanddate. com is an incumbent enterprise that went live for the first time in 1998. With over a decade and more of proven expertise, we are an exact and trusted supplier of time- and date-related information around the world. Country time zone and summer time (summer time) schedule are continuously changed.
Conscious of the impact of these changes in all lands and areas, the World Clock-Time Zones application will adapt the periods on the basis of timeanddate.com's dependable and up-to-date database. Personally, I like the fact that I can easily include my favourite time zones, as well as finding the odd temp information when I need to get in touch with someone in a new one.
Keeping me up to date on the exact time in a number of towns around the world that I use before making my own telephone call.
Building a world clock at the finish line
Find out more about NSDate, NSCalendar & PackageComponents.... We will use Apple's built-in time and date class in this Tutorial to create a working world clock that displays the actual date and time for 6 towns around the world. I' ll also inform you about how to use the class that are useful for handling time and date in Objective-C.
Actually, a clock in your system is just a tag that is periodically refreshed to show the most-recent time. NSDate does this using its capability to get the most up-to-date about the date attribute and an execution of another scheduledTimer process named scheduledTimerWithTimeInterval: target: selector: userInfo: repeats: which continually refreshes the time and date tags.
IBAction named cityButtonTapped: determines the town that a tapped visitor will tap and calls the command to start the cityTimer. initialize a scheduler that specify specified parameters, specifying the intervals at which the scheduler should call the selection mode parameter setting DateTimeLabelsWithTimeZone. initialize the date and time names using the formatting mode parameter setting CurrentDateTimeForTimeZone.
Finally, formatCurrentDateTimeTimeTimeForTimeZone, which retrieves the actual date and time at that time and displays a beautifully styled NSString. User interface will include a large UI label representing time, a UI label for date and six UI buttons for the six towns. Create points of sale for each of the UI labels and name them by the town or function, i.e. i. e. i. e. i. e. i. e. i. e. i. e. timeLabel and i. e. i. e. i. e. i. e. timeLabel label).
Create an action mode named'cityButtonTapped' and associate all six keys with it. Each time the occupant touches one of the six pushbuttons, the cityButtonTapped: methode is executed. But how does our programme know which town is chosen? Probably there are more perfect and secure ways to see which knob has been touched, but in the interest of concentrating on the construction of the clock I will use tagging.
Next, we finish the cityButtonTapped: Met. There are two things this approach should do: Second, call a way that contains the timing that starts the timing. Let's set the trait that contains the timezone you select. This is how the entire cityButtonTapped: button will look like. As long as this time zonecode represents this place, you can view the time for each town.
This is a full listing of time zones for you. Triggers a new countdown time. self setTappedCityTimer]; Note: I used the Wordtimer instead of Clock. The next step is to build the methods setTappedCityTimer: and the timing properties. Initially, set a timing property: NSTimer * The timer; then do the setTappedCityTimer: command.
As a result, the specified time is invalid. Keep in mind that this executable is executed every time the end users type on a new town. Each time we want a complete new one, so we disable any current one that might already be on. Because we want to get rid off an already existent timer and create a whole new one, we reset the timing to zero.
It clears the storage and is a necessary stage to ensure that the clock remains precise. This is where we call a new way to getCurrentDateTimeForTimeZone: . Each time the clock is ticking, this technique is used to return new time and date information. It is the way used by the programmer in line 6 in each intervall.
I' ll call it one because it eliminates a delay in the clock at the first opening. This creates a new scheduled timetimer with scheduledTimerWithTimeInterval: target: selector: userInfo: repeats: It updates the clock by refreshing the time label at a specified intervals. The scheduledTimerWithTimeInterval: target: selector: userInfo: repeats: method from NSTimer updates the time label at a specified intervals. This is the firing mode at the intervals.
Next we construct the methods formatCurrentDateTimeTimeForTimeZone and discuss some useful date categories. Rows 2 & 3: Declares date and time formatting instance, see the following section on NSDateFormatter. Rows 5: A time region is defined and placed on the value of the available ZeitZone attribute, see below in the NSTimeZone section.
Rows 7 & 10: The date formatting is adjusted to POSIX-Locale. Rows 8 & 11: The date formatting tool picks up the specified character string and is waiting to reformat the date and time accordingly. Rows 9 & 12: The date formatting tool occupies the specified time area for the chosen town. Row 14: The actual time and date at the exact time of the operation are logged.
Rows 15 & 16: Date and time are transformed into character chains using the formatting character chains of rows 8 & 11. Row 17: The time and date string formats are placed in an arrays return to the place where they are displayed in the setDateTimeLabelsWithTimeZone. These arrays are then used to display the time and date labels. Finally, we should probably start the clock when the first time the application is opened before the end users have chosen a pushbutton.
NYC can be reset to the standard maturity. You can do this easily by just including the following way to add viewDidLoad. Execute the current world clock working for you! Soon: Watch a world clock on this spot. Let's finish the last step: Add a UI icon that shows which town is currently chosen.
Finally, you must show the current users which cities are chosen and correspond to the time shown. It may seem like an ornamentation of the interface, but it is indispensable for the clock's function. I' ve chosen to modify the colour of the chosen icon to show the choice.
Let's add two new functions: one that changes the text colour of the chosen buttons to orange, and another that changes the entire text colour of the unchosen buttons to orange. In order to emphasize the chosen buttons, let's just put the text colour of the chosenButton properties in orange.
In order to make "unhighlight", we will create a series of all urban knobs. We pass through the towns and if they are not the same as the chosen town, they are included in the not chosen group. Finally, call the method on the non-chosen arrays and set the color of all of them to color cyan.
Your world time clock is ready now. There is a feature in the NPDate category that simply gives back a timestamp for the actual date and time. The timestamp looks something like this:
While NSDate makes it simple to get the actual time with just one line of coding, it almost always wants this date to be shown in a certain way. Convert the NSDate value to a character set form and give you full command over what that date looks like. A date formatting tool is a character chain that specifies how the measurement of time is to be shown.
NSDate value formatting in an NSString is available in two ways: Apple's own locale style character chains and user-defined style character chains. Below you will find a list of supported formats: Hint: NormatterNoStyle is used to leave out a time or date from a certain character chain. The use of a localised date formula looks like this: ndateFormatter *dateFormatter = [[NSDateFormatter alloc] init];[formatter setDateStyle:NSDateFormatterShortStyle]; For the workshop we will use user defined names.
We' ll be formatting the time and date to appear on each label individually in this demonstration. In order to create a user-defined copy of NDateFormatter, we should first define an authority of thesformatter. The use of customizations is done by using the setDateFormat: methods and the formatting character strings.
Format character chain arguments assume a character chain and directly adjust how the date/time is displayed. Be sure to go to http://nsdateformatter. com/ to see a full listing of formatting character chains. As you can see on line 8, we display the date with the full months, the full days name and the year in which the formatting sequence will look like this:
Below is how to apply date and time formats by first declare the former, then retrieve the date, and finally apply the former. ndateFormatter *dateFormatter = [[NSDateFormatter Allocation] init];[formatter setDateFormat:@"EEEE MMMM dd y"]; ndate *now = [NSDate date]; nstring *formattedDate = [formatter stringFromDate:now]; also uses formats. setDateFormat:@"h:mm:ss a"]; // Our resulting formated time will look like this:
There are two further stages required to assure the date and time accuracy: In rows 4, 7, & 10 we define the locale declared as is. Locales used for US applications are namedOSPIX, symbolized by the character chain "en_US_POSIX". Name of the location in which the data is stored: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New: New:
Timezones are either indicated by three-digit acronyms such as "GMT" (for Greenwich Mean Time) or by the full time domain name "America/New_York". You can find a full listing of time zones by outputting the results for the following call[NSTimeZone AbbreviationDictionary]; . There are two ways to define a time domain instance:
Then we''ll adjust the time zoning to the date formats in lines 8 & 11: [dateFormatter setTimeZone:localTimeZone]; [timeFormatter setTimeZone:localTimeZone]; [timeTimeZone:localTimeZone]; There are other important Apple categories that were not needed in this Tutorial and cover the time and date. NSCalendar's initWithCalendarIdentifier: methods is used to specify which calendars are to be used to specify the length of a day, week, month, year, etc. The initWithCalendarIdentifier: methods of NSCalendar is used to specify the length of a year.
As soon as the calendars are finished, the time measurements can be converted into component values. NC calibration unit divides the NC date value into measurement time slots, so-called NC date constituents. If required, the calendaring unit can be used to display the date and time. *now = [NSDate date]; initWithCalendarIdentifier: units fromDate:now]; These items can also be reset to an existing file or used to make computations with time.