iOS應用程序中的搜索欄搜索PHP/MYSQLi並將JSON解析回iOS應用程序？

Question

我想感謝過去和未來的所有人，他們幫助我完成了我的旅程。所以，我有一個iOS的新應用程序，我想從iOS應用程序搜索MYSQLi數據庫。從那裏，我希望它在UITableView中填充結果。我已經有了表格視圖的代碼。我也已經知道如何在PHP中使用json_encode函數。我的問題是，如何從iOS應用程序向MYSQL數據庫發送查詢並將其作爲JSON返回？例如，下面是我如何從我的網站搜索我的MYSQL數據庫。我想從我的iOS應用程序中做同樣的事情。

我應該提到，我已經使用JSONSerialization類，並且解析是很好的。我只是不知道如何從iOS發送查詢到MYSQL並返回。

<?php 

     $search = $_POST['searchquery']; 
     $query = "SELECT * FROM blacklisted WHERE MATCH (name, address, city, state, zip) AGAINST ('%$search%' IN BOOLEAN MODE)"; 
     $result = mysqli_query($connection, $query); 
     $numrows = mysqli_num_rows($result); 
     if ($search == null) 
     { 
      echo "Search The Blacklist Today!"; 
     } 
     else if($search != null) 
     { 
     while ($row = mysqli_fetch_array($result)) 
     { 
     $name = $row['name']; 
     $address = $row['address']; 
     $city = $row['city']; 
     $state = $row['state']; 
     $zip = $row['zip']; 
     $date = $row['date']; 
     $persons = $row['persons']; 
     $damages = $row['damages']; 
     $complaint = $row['complaint']; 
    ?> 

The Blacklist JSON Output

The Blacklist

#import "Search.h" 

@implementation Search 

NSDictionary *dictionary; 
NSArray *complaints; 
NSString * json; 
NSData * data; 
NSMutableString* mainlabel; 
NSMutableString* detaillabel; 
NSMutableURLRequest *request; 

@synthesize searchfield, table; 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
} 

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText 

{ 
    NSString*searchtext = searchfield.text; 

    NSString *post =[[NSString alloc] initWithFormat:@"%@", searchtext]; 

    NSURL *url=[NSURL URLWithString:@"http://www.zebradatasolutions.com/theblacklist/jsonsearch.php"]; 

    NSData *postData = [post dataUsingEncoding: NSASCIIStringEncoding allowLossyConversion: YES]; 

    NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]]; 

    request = [[NSMutableURLRequest alloc] init]; 

    [request setURL:url]; 
    [request setHTTPMethod:@"POST"]; 
    [request setValue: postLength forHTTPHeaderField:@"Content-Length"]; 
    [request setValue: @"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"]; 
    [request setHTTPBody:postData]; 

    NSError *error; 
    NSURLResponse *response; 

    NSData *urlData=[NSURLConnection sendSynchronousRequest: request returningResponse: & response error: & error]; 

    json =[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding]; 

    data =[json dataUsingEncoding:NSUTF8StringEncoding]; 

    dictionary = [NSJSONSerialization JSONObjectWithData: data options:NSJSONReadingAllowFragments error: nil]; 

    complaints = [dictionary valueForKey:@"blacklistsearch"]; 

    [table reloadData]; 

    NSLog(@"dictionary = %@", dictionary); 

} 

- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MainCell"]; 

    if (cell == nil) 

    { 
     cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"MainCell"]; 
    } 

    NSString * name = complaints[indexPath.row][@"name"]; 

    NSString *address = complaints[indexPath.row][@"address"]; 

    NSString *city = complaints[indexPath.row][@"city"]; 

    NSString *state = complaints[indexPath.row][@"state"]; 

    NSString *zip = complaints[indexPath.row][@"zip"]; 

    NSString *date = complaints[indexPath.row][@"date"]; 

    NSString *persons = complaints[indexPath.row][@"persons"]; 

    NSString *damages = complaints[indexPath.row][@"damages"]; 

    NSString *complaint = complaints[indexPath.row][@"complaint"]; 

    mainlabel = [[NSMutableString alloc]init]; 

    detaillabel = [[NSMutableString alloc]init]; 

    [mainlabel appendString:[NSMutableString stringWithFormat:@"%@", name]]; 

    [detaillabel appendString: [NSMutableString stringWithFormat:@"\n\n%@\n%@, %@\n%@\n\n%@\n\n%@\n\n%@\n\n%@\n", address, city, state, zip, date, persons, damages, complaint]]; 

    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; 

    cell.textLabel.text = mainlabel; 

    cell.detailTextLabel.text = detaillabel; 

    cell.textLabel.textColor = [UIColor magentaColor]; 

    cell.detailTextLabel.textColor = [UIColor whiteColor]; 

    return cell; 


} 

-(IBAction) closekeyboard: (id)sender 
{ 
    [searchfield resignFirstResponder]; 
} 

@end 

Answer 1

你錯了設置在後數據的搜索參數。的

代替

NSString *post =[[NSString alloc] initWithFormat:@"%@", searchtext]; 

，你應該這樣做

NSString *post =[[NSString alloc] initWithFormat:@"myValue=%@&otherValue=%@", searchtext,otherTextYouWant]; 

其中 「myvalue的」 和 「otherValue」 你會使用服務器端檢索值SEARCHTEXT和otherTextYouWant 鍵（如$_POST['myValue']）

此外，你應該編碼所有的參數發送之前，可能使用這個

-(NSString *)urlEncodeStrirng:(NSString*)baseString UsingEncoding:(NSStringEncoding)encoding {   
    return (NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(NULL, (CFStringRef)baseString,NULL, (CFStringRef)@"!*'\"();:@&=+$,/?%#[]% ", CFStringConvertNSStringEncodingToEncoding(encoding))); 
} 

所以你行的代碼將成爲

NSString *post =[[NSString alloc] initWithFormat:@"myValue=%@", [self urlEncodeString:searchtext ] searchtext UsingEncoding:NSUTF8StringEncoding]; 

Remeber逃脫收到SEARCHTEXT服務器端之前對其進行查詢，以分貝，使用和addslashes（或改變的方式來查詢數據庫，也許使用PDO），以避免SQL - 注射

我希望它能幫助你