cajun-code · davidspivak · Dec 6, 2012 · Dec 6, 2012 · Dec 6, 2012
diff --git a/CashReegister.xcodeproj/project.pbxproj b/CashReegister.xcodeproj/project.pbxproj
@@ -20,6 +20,7 @@
 		4EA04E8115E5212500021A01 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 4EA04E6215E5212500021A01 /* Foundation.framework */; };
 		4EA04E8915E5212500021A01 /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = 4EA04E8715E5212500021A01 /* InfoPlist.strings */; };
 		4EA04E8C15E5212500021A01 /* CashReegisterTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 4EA04E8B15E5212500021A01 /* CashReegisterTests.m */; };
+		5811C1EB1670F43F00BF93DB /* Currency.m in Sources */ = {isa = PBXBuildFile; fileRef = 5811C1EA1670F43F00BF93DB /* Currency.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -52,6 +53,8 @@
 		4EA04E8815E5212500021A01 /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/InfoPlist.strings; sourceTree = "<group>"; };
 		4EA04E8A15E5212500021A01 /* CashReegisterTests.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = CashReegisterTests.h; sourceTree = "<group>"; };
 		4EA04E8B15E5212500021A01 /* CashReegisterTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = CashReegisterTests.m; sourceTree = "<group>"; };
+		5811C1E91670F43F00BF93DB /* Currency.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = Currency.h; sourceTree = "<group>"; };
+		5811C1EA1670F43F00BF93DB /* Currency.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = Currency.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -116,6 +119,8 @@
 				4EA04E7215E5212500021A01 /* MainStoryboard.storyboard */,
 				4EA04E7515E5212500021A01 /* ViewController.h */,
 				4EA04E7615E5212500021A01 /* ViewController.m */,
+				5811C1E91670F43F00BF93DB /* Currency.h */,
+				5811C1EA1670F43F00BF93DB /* Currency.m */,
 				4EA04E6715E5212500021A01 /* Supporting Files */,
 			);
 			path = CashReegister;
@@ -261,6 +266,7 @@
 				4EA04E6D15E5212500021A01 /* main.m in Sources */,
 				4EA04E7115E5212500021A01 /* AppDelegate.m in Sources */,
 				4EA04E7715E5212500021A01 /* ViewController.m in Sources */,
+				5811C1EB1670F43F00BF93DB /* Currency.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -434,6 +440,7 @@
 				4EA04E9115E5212500021A01 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		4EA04E9215E5212500021A01 /* Build configuration list for PBXNativeTarget "CashReegisterTests" */ = {
 			isa = XCConfigurationList;
@@ -442,6 +449,7 @@
 				4EA04E9415E5212500021A01 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};

diff --git a/CashReegister/Currency.h b/CashReegister/Currency.h
@@ -0,0 +1,15 @@
+//
+//  Currency.h
+//  CashReegister
+//
+//  Created by David Spivak on 12/6/12.
+//  Copyright (c) 2012 Dealermatch. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface Currency : NSObject
+@property(strong,nonatomic)NSNumber *value;
+@property(strong,nonatomic)NSString *name;
+
+@end
diff --git a/CashReegister/Currency.m b/CashReegister/Currency.m
@@ -0,0 +1,15 @@
+//
+//  Currency.m
+//  CashReegister
+//
+//  Created by David Spivak on 12/6/12.
+//  Copyright (c) 2012 Dealermatch. All rights reserved.
+//
+
+#import "Currency.h"
+
+@implementation Currency
+@synthesize value;
+@synthesize name;
+
+@end
diff --git a/CashReegister/ViewController.h b/CashReegister/ViewController.h
@@ -7,7 +7,14 @@
 //
 
 #import <UIKit/UIKit.h>
+#import "Currency.h"
 
-@interface ViewController : UIViewController
+@interface ViewController : UIViewController<UITextFieldDelegate>
+@property (weak, nonatomic) IBOutlet UITextField *txtPrice;
+@property (weak, nonatomic) IBOutlet UITextField *txtCash;
+- (IBAction)btnChange:(id)sender;
+@property (weak, nonatomic) IBOutlet UIScrollView *scrChange;
+@property(strong,nonatomic)NSArray *arrCurrency;
+@property(assign,nonatomic)int scrollHeight;
 
 @end
diff --git a/CashReegister/ViewController.m b/CashReegister/ViewController.m
@@ -14,14 +14,48 @@ @interface ViewController ()
 
 @implementation ViewController
 
+//set up initial values, construct array of currency
 - (void)viewDidLoad
 {
+    self.scrollHeight = 0;
+    self.arrCurrency = [[NSArray alloc]initWithObjects:
+    [self getCurrencyWithValue:100.00 andIdentify:@"ONE HUNDRED"],
+    [self getCurrencyWithValue:50.00 andIdentify:@"FIFTY"],
+    [self getCurrencyWithValue:20.00 andIdentify:@"TWENTY"],
+    [self getCurrencyWithValue:10.00 andIdentify:@"TEN"],
+    [self getCurrencyWithValue:5.00 andIdentify:@"FIVE"],
+    [self getCurrencyWithValue:2.00 andIdentify:@"TWO"],
+    [self getCurrencyWithValue:1.00 andIdentify:@"ONE"],
+    [self getCurrencyWithValue:0.50 andIdentify:@"HALF DOLLAR"],
+    [self getCurrencyWithValue:0.25 andIdentify:@"QUARTER"],
+    [self getCurrencyWithValue:0.10 andIdentify:@"DIME"],
+    [self getCurrencyWithValue:0.05 andIdentify:@"NICKEL"],
+    [self getCurrencyWithValue:0.01 andIdentify:@"PENNY"],nil];
+
     [super viewDidLoad];
 	// Do any additional setup after loading the view, typically from a nib.
 }
+-(BOOL)textFieldShouldReturn:(UITextField *)textField
+{
+    [textField resignFirstResponder];
+    return YES;
+}
+
+
+-(Currency*)getCurrencyWithValue:(float)v andIdentify:(NSString*)s
+{
+    Currency *c = [[Currency alloc]init];
+    c.value = [NSNumber numberWithFloat:v];
+    c.name = [NSString stringWithString:s];
+    return c;
+}
+
 
 - (void)viewDidUnload
 {
+    [self setTxtPrice:nil];
+    [self setTxtCash:nil];
+    [self setScrChange:nil];
     [super viewDidUnload];
     // Release any retained subviews of the main view.
 }
@@ -31,4 +65,112 @@ - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interface
     return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
 }
 
+//convert any string to a valid number
+-(NSString*)convertNumber:(NSString*)input
+{
+    NSMutableCharacterSet *decimalAndDot = [NSMutableCharacterSet characterSetWithCharactersInString:@"."];
+    [decimalAndDot formUnionWithCharacterSet:[NSCharacterSet decimalDigitCharacterSet]];
+    NSString *formattedInput = [[input componentsSeparatedByCharactersInSet:[decimalAndDot invertedSet]]componentsJoinedByString:@""];
+    NSMutableArray *decimalComponents = [NSMutableArray arrayWithArray: [formattedInput componentsSeparatedByString:@"."]];
+
+    //if there is at least one decimal point
+    if([decimalComponents count] > 1)
+    {
+        NSArray *temp = [NSArray arrayWithObjects:[decimalComponents objectAtIndex:0],[decimalComponents objectAtIndex:1], nil];
+        [decimalComponents removeObjectAtIndex:0];
+        [decimalComponents replaceObjectAtIndex:0 withObject:[temp componentsJoinedByString:@"."]];
+        formattedInput = [decimalComponents componentsJoinedByString:@""];
+    }
+    return formattedInput;
+}
+
+//round it to 2 decimal places
+-(float)roundStringValue:(NSString*)s
+{
+    int temp = ([s floatValue] * 100 + .5);
+    float rounded = temp;
+    rounded = rounded/100;
+    return rounded;
+}
+
+//print string to scrollView
+-(void)displayResults:(NSString*)s
+{
+    CGSize maximumLabelSize = CGSizeMake(320,9999);
+    CGSize expectedLabelSize = [s sizeWithFont:[UIFont fontWithName:@"Helvetica" size:16] constrainedToSize:maximumLabelSize lineBreakMode:NSLineBreakByWordWrapping];
+    UILabel *lblChange = [[UILabel alloc]initWithFrame:CGRectMake(5, self.scrollHeight, self.scrChange.frame.size.width-10, expectedLabelSize.height)];
+    [lblChange setFont:[UIFont fontWithName:@"Helvetica" size:16]];
+    [lblChange setText:s];
+    [lblChange setNumberOfLines:0];
+    [lblChange setLineBreakMode:NSLineBreakByWordWrapping];
+    [self.scrChange addSubview:lblChange];
+    self.scrollHeight = self.scrollHeight + 30 + lblChange.frame.size.height;
+    [self.scrChange setContentSize:CGSizeMake(self.scrChange.frame.size.width, self.scrollHeight)];
+
+    int position = 0;
+
+    //if the user could scroll, scroll to the bottom
+    if(self.scrChange.contentSize.height > self.scrChange.frame.size.height)
+    {
+        position = self.scrChange.contentSize.height - self.scrChange.frame.size.height;
+    }
+
+    [self.scrChange setContentOffset:CGPointMake(0, position) animated:YES];
+}
+
+
+//when the user presses the change button
+- (IBAction)btnChange:(id)sender
+{
+    [self.txtPrice resignFirstResponder];
+    [self.txtCash resignFirstResponder];
+    float price = [self roundStringValue: [self convertNumber:self.txtPrice.text]];
+    [self.txtPrice setText:[NSString stringWithFormat:@"%.2f",price]];
+    float cash = [self roundStringValue: [self convertNumber:self.txtCash.text]];
+    [self.txtCash setText:[NSString stringWithFormat:@"%.2f",cash]];
+    float owed = cash - price;
+
+
+    //if they gave more cash than the price
+    if(owed > 0)
+    {
+        NSMutableString *allChange = [[NSMutableString alloc]initWithString:@""];
+
+        //for each unit of currency in order from greatest to least money
+        for(Currency *c in self.arrCurrency)
+        {
+            BOOL done = NO;
+            //while this unit is still less than the total owed
+            while(!done)
+            {
+                //if this unit is still less than the total owed
+                if(owed - [c.value floatValue] >= 0)
+                {
+                    NSLog(@"thing: %@, amount left: %f",c.name,owed);
+                    [allChange appendFormat:@"%@,",c.name ];
+                    owed = owed - [c.value floatValue];
+
+                }
+                //or it it's not, move onto the next lowest unit
+                else
+                {
+                    done = YES;
+                }
+            }
+        }
+        [allChange deleteCharactersInRange:NSMakeRange([allChange length]-1, 1)];
+        [self displayResults:allChange];
+    }
+    //or if they gave exact change
+    else if(owed == 0)
+    {
+        [self displayResults:@"ZERO"];
+    }
+    //or if they didn't give enough money
+    else
+    {
+        [self displayResults:@"ERROR"];
+    }
+
+}
 @end
diff --git a/CashReegister/en.lproj/MainStoryboard.storyboard b/CashReegister/en.lproj/MainStoryboard.storyboard
@@ -1,21 +1,64 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="1.0" toolsVersion="1906" systemVersion="11A511" targetRuntime="iOS.CocoaTouch" nextObjectID="6" propertyAccessControl="none" initialViewController="2">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="2.0" toolsVersion="2840" systemVersion="11G56" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" initialViewController="2">
     <dependencies>
-        <development defaultVersion="4200" identifier="xcode"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="902"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="1926"/>
     </dependencies>
     <scenes>
+        <!--View Controller-->
         <scene sceneID="5">
             <objects>
-                <placeholder placeholderIdentifier="IBFirstResponder" id="4" sceneMemberID="firstResponder"/>
                 <viewController id="2" customClass="ViewController" sceneMemberID="viewController">
                     <view key="view" contentMode="scaleToFill" id="3">
                         <rect key="frame" x="0.0" y="20" width="320" height="460"/>
                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
-                        <subviews/>
+                        <subviews>
+                            <scrollView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" id="ADL-SO-Ngg">
+                                <rect key="frame" x="0.0" y="204" width="320" height="256"/>
+                                <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                            </scrollView>
+                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Price" textAlignment="center" minimumFontSize="17" id="eW0-Dp-NOx">
+                                <rect key="frame" x="75" y="29" width="171" height="30"/>
+                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
+                                <textInputTraits key="textInputTraits"/>
+                                <connections>
+                                    <outlet property="delegate" destination="2" id="AyD-hR-ZaS"/>
+                                </connections>
+                            </textField>
+                            <textField opaque="NO" clipsSubviews="YES" contentMode="scaleToFill" contentHorizontalAlignment="left" contentVerticalAlignment="center" borderStyle="roundedRect" placeholder="Cash Given" textAlignment="center" minimumFontSize="17" id="R2I-zb-srT">
+                                <rect key="frame" x="75" y="79" width="171" height="30"/>
+                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                                <fontDescription key="fontDescription" type="system" pointSize="14"/>
+                                <textInputTraits key="textInputTraits"/>
+                                <connections>
+                                    <outlet property="delegate" destination="2" id="lhF-hb-MAg"/>
+                                </connections>
+                            </textField>
+                            <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="Kgf-p1-JnF">
+                                <rect key="frame" x="105" y="132" width="111" height="44"/>
+                                <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                                <fontDescription key="fontDescription" type="boldSystem" pointSize="15"/>
+                                <state key="normal" title="Get Change">
+                                    <color key="titleColor" red="0.19607843459999999" green="0.30980393290000002" blue="0.52156865600000002" alpha="1" colorSpace="calibratedRGB"/>
+                                    <color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
+                                </state>
+                                <state key="highlighted">
+                                    <color key="titleColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                                </state>
+                                <connections>
+                                    <action selector="btnChange:" destination="2" eventType="touchUpInside" id="DXN-Nj-sXF"/>
+                                </connections>
+                            </button>
+                        </subviews>
                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
                     </view>
+                    <connections>
+                        <outlet property="scrChange" destination="ADL-SO-Ngg" id="EDQ-hV-ED6"/>
+                        <outlet property="txtCash" destination="R2I-zb-srT" id="NgA-3X-CbS"/>
+                        <outlet property="txtPrice" destination="eW0-Dp-NOx" id="Dla-t7-gkE"/>
+                    </connections>
                 </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="4" sceneMemberID="firstResponder"/>
             </objects>
         </scene>
     </scenes>

diff --git a/CashReegisterTests/CashReegisterTests.m b/CashReegisterTests/CashReegisterTests.m
@@ -29,4 +29,5 @@ - (void)testExample
     STFail(@"Unit tests are not implemented yet in CashReegisterTests");
 }
 
+
 @end
Original file line number	Diff line number	Diff line change
Expand Up		@@ -29,4 +29,5 @@ - (void)testExample
		STFail(@"Unit tests are not implemented yet in CashReegisterTests");
		}


		@end