为什么我的代码没有成功更新我的mysql数据库（有时有效）？

时间：2014-10-20 06:39:49

标签： php mysql objective-c

我是mysql和php的新手。我正在尝试编写一个iOS应用程序，通过“列表”基本上将书籍列入数据库。这是我的表格在数据库中列出的图片： http://i.stack.imgur.com/a0LLV.png

isbn是一个全球变量。我很肯定这不是问题。发生了很多奇怪的事情，我无法弄清问题是什么。有时代码将按照我的意图运行，新的列表将成功添加到我的表中。其他时候它根本不添加行。当我NSLog dataURL 时，它显示（null）它工作的时间，并显示＆lt;＆gt;它的工作或部分工作时间。我说部分工作，因为有时由于某种原因它不会将所有deleteCode输入数据库表。除了deleteCode之外，它将输入一切正常，在这种情况下，它有时会输入随机数字的数字。它总是应该是20个字符长，但有时它只进入第一个字符，有时它输入10个字符，有时它输入18个字符......这很奇怪。当我NSLog deleteCode它总是显示正确的20个字符deleteCode但它总是没有进入数据库...请帮助我我很困惑:(以下是我的iOS代码：

#import "ListBookViewController.h"
#include <unistd.h>
#include <netdb.h>

NSString *isbnSelling;

@interface ListBookViewController ()

@end

@implementation ListBookViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    codeToDeleteBook = [self generateDeleteCode];
    NSLog(@"%@", codeToDeleteBook);
    self.priceTextField.autocorrectionType = UITextAutocorrectionTypeNo;
    self.emailTextField.autocorrectionType = UITextAutocorrectionTypeNo;
    self.phoneTextField.autocorrectionType = UITextAutocorrectionTypeNo;
    self.conditionTextField.autocorrectionType = UITextAutocorrectionTypeNo;

    self.listBookButton.layer.cornerRadius = 20;
    self.listBookButton.layer.borderColor=[UIColor blackColor].CGColor;
    self.listBookButton.layer.borderWidth= 2.0f;

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]
                                   initWithTarget:self
                                   action:@selector(dismissKeyboard)];
    tap.cancelsTouchesInView = NO;
    [self.view addGestureRecognizer:tap];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(BOOL)isValidEmail:(NSString *)checkString
{
    BOOL stricterFilter = NO;
    NSString *stricterFilterString = @"[A-Z0-9a-z\\._%+-]+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}";
    NSString *laxString = @".+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*";
    NSString *emailRegex = stricterFilter ? stricterFilterString : laxString;
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    return [emailTest evaluateWithObject:checkString];
}

- (IBAction)listBookButtonPressed:(id)sender
{
    // Making sure price is valid
    self.priceTextField.text = [self.priceTextField.text stringByReplacingOccurrencesOfString:@"$" withString:@""];
    self.priceTextField.text = [self.priceTextField.text stringByReplacingOccurrencesOfString:@" " withString:@""];

    if ([self.priceTextField.text rangeOfString:@"."].location != NSNotFound)
    {
        self.errorLabel.text = @"Price must be rounded by the dollar. EXAMPLE: 50";
        return;
    }

    NSScanner* scan = [NSScanner scannerWithString:self.priceTextField.text];
    int val;

    if([scan scanInt:&val] && [scan isAtEnd])
    {
        if([self.priceTextField.text intValue] > 999)
        {
            self.errorLabel.text = @"Maximum price to list a book at is $999.";
            return;
        }
    }

    else
    {
        self.errorLabel.text = @"Invalid price.";
        return;
    }



    // Making sure email address is valid
    self.emailTextField.text = [self.emailTextField.text stringByReplacingOccurrencesOfString:@" " withString:@""];

    if(![self isValidEmail:self.emailTextField.text])
    {
        self.errorLabel.text = @"Invalid email.";
        return;
    }

    if([self.emailTextField.text length] > 49)
    {
        self.errorLabel.text = @"Email must be smaller than 50 characters.";
        return;
    }



    // Making sure phone number is valid
    self.phoneTextField.text = [self.phoneTextField.text stringByReplacingOccurrencesOfString:@" " withString:@""];
    self.phoneTextField.text = [self.phoneTextField.text stringByReplacingOccurrencesOfString:@"-" withString:@""];

    NSScanner *scan2 = [NSScanner scannerWithString:self.phoneTextField.text];
    int val2;

    if(!([scan2 scanInt:&val2] && [scan2 isAtEnd]))
    {
        if(![self.phoneTextField.text isEqualToString:@""] && ![self.phoneTextField.text isEqualToString:@"N/A"])
        {
            self.errorLabel.text = @"Invalid phone number.";
            return;
        }
    }

    self.errorLabel.text = @"";

    if([self.phoneTextField.text isEqualToString:@""])
        self.phoneTextField.text = @"N/A";



    if([self internetReachable])
    {
        [self.priceTextField setEnabled:false];
        [self.emailTextField setEnabled:false];
        [self.phoneTextField setEnabled:false];
        [self.conditionTextField setEnabled:false];
        [self.listBookButton setEnabled:false];


        if([[UIDevice currentDevice] respondsToSelector:@selector(isMultitaskingSupported)])
        {
            if([[UIDevice currentDevice] isMultitaskingSupported])
            {
                UIApplication *application = [UIApplication sharedApplication];

                __block UIBackgroundTaskIdentifier background_task;

                background_task = [application beginBackgroundTaskWithExpirationHandler: ^ {
                    [application endBackgroundTask: background_task];
                    background_task = UIBackgroundTaskInvalid;
                }];

                dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

                    // Entering data into Listings table
                    NSString *strURL = [NSString stringWithFormat:@"http://example.org/addListing.php?deleteCode=%@&isbn13=%@&price=%@&email=%@&phone=%@&condition=%@", codeToDeleteBook ,isbnSelling ,self.priceTextField.text, self.emailTextField.text, self.phoneTextField.text, self.conditionTextField.text];
                    NSData *dataURL = [NSData dataWithContentsOfURL:[NSURL URLWithString:strURL]];
                    NSLog(@"%@", dataURL);

                    // Entering data into ContactInfo table
                    NSString *strURL2 = [NSString stringWithFormat:@"http://example.org/addContactInfo.php?email=%@&phone=%@", self.emailTextField.text, self.phoneTextField.text];
                    NSData *dataURL2 = [NSData dataWithContentsOfURL:[NSURL URLWithString:strURL2]];


                    [application endBackgroundTask: background_task];
                    background_task = UIBackgroundTaskInvalid;


                    dispatch_async(dispatch_get_main_queue(), ^{
                        self.bookListedImage.hidden = false;
                        self.deleteCodeLabel.hidden = false;
                        self.deleteCodeLabel.text = codeToDeleteBook;
                    });
                });
            }
        }
    }

    else
    {
        self.errorLabel.text = @"Could not connect to internet.";
    }
}

- (IBAction)startedEditingPriceTextField:(id)sender
{
    self.listBookButton.hidden = true;
}

- (IBAction)startedEditingEmailTextField:(id)sender
{
    self.listBookButton.hidden = true;
}

- (IBAction)startedEditingPhoneTextField:(id)sender
{
    self.listBookButton.hidden = true;
}

- (IBAction)startedEditingConditionTextField:(id)sender
{
    self.listBookButton.hidden = true;
}

- (IBAction)doneEditingPriceTextField:(id)sender
{
    self.listBookButton.hidden = false;
}

- (IBAction)doneEditingEmailTextField:(id)sender
{
    self.listBookButton.hidden = false;
}

- (IBAction)doneEditingPhoneTextField:(id)sender
{
    self.listBookButton.hidden = false;
}

- (IBAction)doneEditingConditionTextField:(id)sender
{
    self.listBookButton.hidden = false;
}

-(void)dismissKeyboard
{
    self.listBookButton.hidden = false;
    [self.priceTextField resignFirstResponder];
    [self.emailTextField resignFirstResponder];
    [self.phoneTextField resignFirstResponder];
    [self.conditionTextField resignFirstResponder];
}

-(NSString *)generateDeleteCode
{
    NSString *deleteCode = @"";

    for(int i = 0; i < 20; i++)
    {
        NSInteger randomNumber = arc4random() % 62; // generates random number between 0 and 61 (62 different random characters)

        switch(randomNumber)
        {
            case 0:
                deleteCode = [deleteCode stringByAppendingString:@"0"];
                break;

            case 1:
                deleteCode = [deleteCode stringByAppendingString:@"&"];
                break;

            case 2:
                deleteCode = [deleteCode stringByAppendingString:@"2"];
                break;

            case 3:
                deleteCode = [deleteCode stringByAppendingString:@"3"];
                break;

            case 4:
                deleteCode = [deleteCode stringByAppendingString:@"4"];
                break;

            case 5:
                deleteCode = [deleteCode stringByAppendingString:@"5"];
                break;

            case 6:
                deleteCode = [deleteCode stringByAppendingString:@"6"];
                break;

            case 7:
                deleteCode = [deleteCode stringByAppendingString:@"7"];
                break;

            case 8:
                deleteCode = [deleteCode stringByAppendingString:@"8"];
                break;

            case 9:
                deleteCode = [deleteCode stringByAppendingString:@"9"];
                break;

            case 10:
                deleteCode = [deleteCode stringByAppendingString:@"q"];
                break;

            case 11:
                deleteCode = [deleteCode stringByAppendingString:@"w"];
                break;

            case 12:
                deleteCode = [deleteCode stringByAppendingString:@"e"];
                break;

            case 13:
                deleteCode = [deleteCode stringByAppendingString:@"r"];
                break;

            case 14:
                deleteCode = [deleteCode stringByAppendingString:@"t"];
                break;

            case 15:
                deleteCode = [deleteCode stringByAppendingString:@"y"];
                break;

            case 16:
                deleteCode = [deleteCode stringByAppendingString:@"u"];
                break;

            case 17:
                deleteCode = [deleteCode stringByAppendingString:@"i"];
                break;

            case 18:
                deleteCode = [deleteCode stringByAppendingString:@"o"];
                break;

            case 19:
                deleteCode = [deleteCode stringByAppendingString:@"p"];
                break;

            case 20:
                deleteCode = [deleteCode stringByAppendingString:@"a"];
                break;

            case 21:
                deleteCode = [deleteCode stringByAppendingString:@"s"];
                break;

            case 22:
                deleteCode = [deleteCode stringByAppendingString:@"d"];
                break;

            case 23:
                deleteCode = [deleteCode stringByAppendingString:@"f"];
                break;

            case 24:
                deleteCode = [deleteCode stringByAppendingString:@"g"];
                break;

            case 25:
                deleteCode = [deleteCode stringByAppendingString:@"h"];
                break;

            case 26:
                deleteCode = [deleteCode stringByAppendingString:@"j"];
                break;

            case 27:
                deleteCode = [deleteCode stringByAppendingString:@"k"];
                break;

            case 28:
                deleteCode = [deleteCode stringByAppendingString:@"*"];
                break;

            case 29:
                deleteCode = [deleteCode stringByAppendingString:@"z"];
                break;

            case 30:
                deleteCode = [deleteCode stringByAppendingString:@"x"];
                break;

            case 31:
                deleteCode = [deleteCode stringByAppendingString:@"c"];
                break;

            case 32:
                deleteCode = [deleteCode stringByAppendingString:@"v"];
                break;

            case 33:
                deleteCode = [deleteCode stringByAppendingString:@"b"];
                break;

            case 34:
                deleteCode = [deleteCode stringByAppendingString:@"n"];
                break;

            case 35:
                deleteCode = [deleteCode stringByAppendingString:@"m"];
                break;

            case 36:
                deleteCode = [deleteCode stringByAppendingString:@"Q"];
                break;

            case 37:
                deleteCode = [deleteCode stringByAppendingString:@"W"];
                break;

            case 38:
                deleteCode = [deleteCode stringByAppendingString:@"E"];
                break;

            case 39:
                deleteCode = [deleteCode stringByAppendingString:@"R"];
                break;

            case 40:
                deleteCode = [deleteCode stringByAppendingString:@"T"];
                break;

            case 41:
                deleteCode = [deleteCode stringByAppendingString:@"Y"];
                break;

            case 42:
                deleteCode = [deleteCode stringByAppendingString:@"U"];
                break;

            case 43:
                deleteCode = [deleteCode stringByAppendingString:@"%"];
                break;

            case 44:
                deleteCode = [deleteCode stringByAppendingString:@"$"];
                break;

            case 45:
                deleteCode = [deleteCode stringByAppendingString:@"P"];
                break;

            case 46:
                deleteCode = [deleteCode stringByAppendingString:@"A"];
                break;

            case 47:
                deleteCode = [deleteCode stringByAppendingString:@"S"];
                break;

            case 48:
                deleteCode = [deleteCode stringByAppendingString:@"D"];
                break;

            case 49:
                deleteCode = [deleteCode stringByAppendingString:@"F"];
                break;

            case 50:
                deleteCode = [deleteCode stringByAppendingString:@"G"];
                break;

            case 51:
                deleteCode = [deleteCode stringByAppendingString:@"H"];
                break;

            case 52:
                deleteCode = [deleteCode stringByAppendingString:@"J"];
                break;

            case 53:
                deleteCode = [deleteCode stringByAppendingString:@"K"];
                break;

            case 54:
                deleteCode = [deleteCode stringByAppendingString:@"L"];
                break;

            case 55:
                deleteCode = [deleteCode stringByAppendingString:@"Z"];
                break;

            case 56:
                deleteCode = [deleteCode stringByAppendingString:@"X"];
                break;

            case 57:
                deleteCode = [deleteCode stringByAppendingString:@"C"];
                break;

            case 58:
                deleteCode = [deleteCode stringByAppendingString:@"V"];
                break;

            case 59:
                deleteCode = [deleteCode stringByAppendingString:@"B"];
                break;

            case 60:
                deleteCode = [deleteCode stringByAppendingString:@"N"];
                break;

            case 61:
                deleteCode = [deleteCode stringByAppendingString:@"M"];
                break;

            default:
                deleteCode = [deleteCode stringByAppendingString:@"?"];
                break;
        }
    }

    return deleteCode;
}

- (BOOL)internetReachable
{
    char *hostname;
    struct hostent *hostinfo;
    hostname = "example.org";
    hostinfo = gethostbyname(hostname);

    if (hostinfo == NULL)
        return false;

    else
        return YES;
}

@end

下面是我的php和mysql代码：

<?php

$con=mysqli_connect("localhost","editedOut","editedOut","editedOut");

if (mysqli_connect_errno())
{
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$deleteCode = $_GET["deleteCode"];
$isbn13 = $_GET["isbn13"];
$price = $_GET["price"];
$email = $_GET["email"];
$phone = $_GET["phone"];
$condition = $_GET["condition"];

mysqli_query($con,"INSERT INTO Listings
VALUES ('$deleteCode', (NOW() + INTERVAL 2 HOUR), '$isbn13', $price, '$email', '$phone', '$condition')");

mysqli_close($con);
?>

0 个答案:

没有答案
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