Tag: assignment #1

cs193p – Project #1 Assignment #1 Task #5

Please note, this blog entry is from a previous course. You might want to check out the current one.

Add a C button that clears everything (your display, the new UILabel you added above, etc.). The Calculator should be in the same state as it is at application startup after you touch this new button.

Add an additional row of buttons, one with the label “C” and the rest without labels. It is easiest to remove all autolayout constraints and rebuild them similar to the lecture.
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cs193p – Project #1 Assignment #1 Task #4

Please note, this blog entry is from a previous course. You might want to check out the current one.

Add a UILabel to your UI which shows a history of every operand and operation input by the user. Place it at an appropriate location in your UI.

Add the UILabel at the top of the Storyboard, align it with the left and top guard and resize it to the right hand side guard. Align the display label with the bottom of the new label and remove its top constraint. Add a vertical constraint between the labels, and the missing suggested constraints for the new label. Finally repair the changed constraints for the buttons allowing to “move” their frames.
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cs193p – Project #1 Assignment #1 Task #3

Please note, this blog entry is from a previous course. You might want to check out the current one.

Add the following operations to your Calculator:
a. sin: calculates the sine of the top operand on the stack
b. cos: calculates the cosine of the top operand on the stack
c. π: calculates (well, conjures up) the value of π. For example, 3 π × should put three times the value of π into the display on your calculator. Ditto 3 ↲ π x and also π 3 ×.

Change the empty labels of the three buttons on the right hand side to “sin”, “cos” and “pi”:
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cs193p – Project #1 Assignment #1 Task #2

Please note, this blog entry is from a previous course. You might want to check out the current one.

Your calculator already works with floating point numbers (e.g. if you touch 3 ↲ 4 ÷, it will properly show 0.75), however, there is no way for the user to enter a floating point number directly. Fix this by allowing legal floating point numbers to be entered (e.g. “192.168.0.1” is not a legal floating point number!). You will have to add a new “.” button to your Calculator. Don’t worry too much about precision or significant digits in this assignment.

In Storyboard change the currently blank label of the bottom left button to “.”:
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cs193p – Project #1 Assignment #1 Task #1

Please note, this blog entry is from a previous course. You might want to check out the current one.

Get the Calculator working as demonstrated in lectures 1 and 2. The Autolayout portion at the end of the lecture is extra credit, but give it a try because getting good at autolayout requires experience. If you do not do autolayout, be sure to position everything so that it is visible on all iPhones (i.e. the upper left corner of the scene).

I finished this task already during the lectures, including lecture #3. For convenience sake (mostly mine) I will base the follow tasks on the code from the end of lecture #3.

The complete code for the task #1 (different branches for end of lectures #1, #2 and #3) is available on GitHub.

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cs193p – Assignment #1 Task #5

Please note, this blog entry is from a previous course. You might want to check out the current one.

Matchismo so far only displays the A♣ over and over. Fix Matchismo so that each time the card is flipped face up, it displays a different random card drawn from the
Deck property you’ve created above. In other words, Matchismo should flip through an entire deck of playing cards in random order, showing each card one at a time.

Because we will draw random cards, we should not start with the As of clubs but with the back of the card. We could do that in various ways, e.g. adjusting the story board (remove the text of the button and set the background to the correct image). If you want to adjust the button from inside the view controller, we need to add an outlet. Now we could use this outlet to access and manipulate the button as soon as the view has loaded. e.g. we could set the background and the title of the button. … because I am lazy I just call the existing method to flip the card using the outlet property as argument:

@property (weak, nonatomic) IBOutlet UIButton *cardButton;
...
- (void)viewDidLoad
{
    [super viewDidLoad];
    [self touchCardButton:self.cardButton];
    self.flipCount = 0;
}

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