我想要做的是将最新的NSMutableArray数组条目（使用UITextField输入）乘以3，当使用Plain Segmented Control选择中等强度时选择3，选择vigorous时选择6，然后显示所有条目的总值。乘法发生后的数组。例如。如果User使用Plain Segmented Control选择Moderate并在UITextField中输入120，我需要显示一个值360，并且该值随着更多条目的增加而递增。
到目前为止，我将数组值存储在如下表中，这样可以正常工作。
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:@"SecondViewControllerSegue"]) {
SecondViewController *secondViewController
= [segue destinationViewController];
//secondViewController.infoRequest = self.nameField.text;
NSString* style = (styleSeg.selectedSegmentIndex == 0) ? @"Moderate intensity for" : @"Vigourous intensity for";
[activities addObject:[[NSString alloc]initWithFormat:@"Your activity: %@", self.activityField.text]];
secondViewController.activities = activities;
[activities addObject:[[NSString alloc]initWithFormat:@"%@: %@ minutes", style, self.nameField.text]];
secondViewController.activities = activities;
}
}
我似乎无法乘以并输出值。我一直在玩像
这样的东西if(styleseg.selectedSegmentIndex == 0){
3x(what the user entered in duration)
}
if(styleseg.selectedSegmentIndex == 1){
6x(what the user entered in duration)
}
一个循环试图将数组中的总值相加，只输出0.
int result = 0;
for(int i=0;i<[activities count];i++)
result += [[activities objectAtIndex:i] intValue];
NSLog(@"result = %d", result);
我很难将两者混合在一起做我想做的事。任何帮助是极大的赞赏。
新编辑
ViewController.h
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController {
IBOutlet UIView *nameView;
IBOutlet UITextField *nameField;
IBOutlet UITextField *activityField;
IBOutlet UISegmentedControl *styleSeg;
}
@property UIView *nameView;
@property UITextField *nameField;
@property UITextField *activityField;
@property (strong,nonatomic) NSMutableArray *activities;
- (IBAction)submitButtonTapped:(id)sender;
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender;
@end
ViewController.m
#import "ViewController.h"
#import "SecondViewController.h"
#import "MyActivity.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize nameView;
@synthesize nameField;
@synthesize activityField;
@synthesize activities;
- (void)viewDidLoad
{
[super viewDidLoad];
activities = [[NSMutableArray alloc] init];
//activityName = [[NSMutableArray alloc] init];
}
-(void)viewWillAppear:(BOOL)animated
{
self.nameField.text = @"";
self.activityField.text = @"";
styleSeg.selectedSegmentIndex = 0;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)submitButtonTapped:(id)sender {
NSLog(@"The submit button was clicked.");
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:@"SecondViewControllerSegue"]) {
SecondViewController *secondViewController
= [segue destinationViewController];
secondViewController.infoRequest = self.nameField.text;
/* This was my initial code as in the intial question
NSString* style = (styleSeg.selectedSegmentIndex == 0) ? @"Moderate intensity for" : @"Vigourous intensity for";
[activities addObject:[[NSString alloc]initWithFormat:@"Your activity: %@", self.activityField.text]];
secondViewController.activities = activities;
[activities addObject:[[NSString alloc]initWithFormat:@"%@: %@ minutes", style, self.nameField.text]];
secondViewController.activities = activities;
*/
// New code
MyActivity *activity=[[MyActivity alloc]init];
activity.description=self.activityField.text;
activity.duration=[self.nameField.text intValue];
activity.intensity=(styleSeg.selectedSegmentIndex == 0) ? 3:6;
[self.activities addObject:activity];
secondViewController.activities = activities;
}
}
@end
SecondViewController.h
#import <UIKit/UIKit.h>
@interface SecondViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>
{
IBOutlet UIView *secondView;
IBOutlet UILabel *nameLabel;
}
@property IBOutlet UITableView *activityTableView;
@property NSMutableArray* activities;
//@property NSMutableArray* activityName;
@property UIView *secondView;
@property UILabel *nameLabel;
@property (weak, nonatomic) IBOutlet UILabel *nameLabel2;
@property id infoRequest;
-(IBAction)goBack:(id)sender;
@end
SecondViewController.m
#import "SecondViewController.h"
@interface SecondViewController ()
@end
@implementation SecondViewController
@synthesize secondView;
@synthesize nameLabel;
@synthesize nameLabel2;
@synthesize activities;
@synthesize infoRequest;
@synthesize activityTableView;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.nameLabel.text = [self.infoRequest description];
self.nameLabel2.text = [self.infoRequest description];
// activities = [[NSArray alloc] init];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(IBAction)goBack:(id)sender
{
UINavigationController* parent = (UINavigationController*)[self parentViewController];
[parent popViewControllerAnimated:YES];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Number of rows is the number of time zones in the region for the specified section.
return [activities count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellReuseIdentifier = @"CellReuseIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellReuseIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellReuseIdentifier];
}
NSString* s = [activities objectAtIndex:indexPath.row];
cell.textLabel.text = s;
return cell;
}
答案 0 :(得分：0)
您的数组似乎包含任意字符串，而不是表示为字符串的整数（＆{34; 10＆＃34;的intValue为10，而{＆＃34;中等强度的intValue为：10分钟＆＃34;是0）。您还要为活动的每个实例添加多个元素 - 活动描述和活动持续时间。
我会创建另一个对象类来封装活动 -
MyActivity.h
@interface MyActivity : NSObject
@property (copy,nonatomic) NSString *description;
@property int duration;
@property int intensity;
@end
创建一个UIButton并将其设置为事件内的doAddToArray。这将为每个新激活添加一个数组条目。分配新的MyActivity并在将其添加到数组之前设置适当的属性 -
在ViewController.m中
-(IBAction)doAddToArray:(id)sender {
MyActivity *activity=[[MyActivity alloc]init];
activity.description=self.activityField.text;
activity.duration=[self.nameField.text intValue];
activity.intensity=(styleSeg.selectedSegmentIndex == 0) ? 3:6;
[self.activities addObject:activity];
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([[segue identifier] isEqualToString:@"SecondViewControllerSegue"]) {
SecondViewController *secondViewController
= [segue destinationViewController];
secondViewController.activities = activities;
}
然后在SecondViewController.h中
#import <UIKit/UIKit.h>
@interface SecondViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>
{
IBOutlet UIView *secondView;
IBOutlet UILabel *nameLabel;
}
@property IBOutlet UITableView *activityTableView;
@property UIView *secondView;
@property UILabel *nameLabel;
@property (weak, nonatomic) IBOutlet UILabel *nameLabel2;
@property (weak, nonatomic) NSArray *activities; // This is used to provide content to the UITableView
@property id infoRequest;
-(IBAction)goBack:(id)sender;
@end
为简洁起见，我不会包含完整的SecondViewController.m，但您有许多地方使用activities self.activities
然后总计数组（无论你需要的地方） -
int total=0;
for (MyActivity *activity in self.activities)
{
total+=activity.duration*activity.intensity;
}