按下按钮后立即退出键盘

Question

I have a button, "getResponse", that makes a XMLRPC call to a server after you put in an IP address in a UITextField. Id like the "getResponse" button to first resign the keyboard if its up THEN make the call to the server.

As it is now, if the keyboard is up, it will make the call to the server, retrive the info or the error if no valid server found, THEN resign the keyboard.

I know its probably something very easy but I can't for the life of me figure it out. Any help would be great, thanks!

Code:

h.

    #import <UIKit/UIKit.h>
#import "XMLRPCResponse.h"
#import "XMLRPCRequest.h"
#import "XMLRPCConnection.h"


@interface SecondViewController : UIViewController <UIPickerViewDataSource, UIPickerViewDelegate, UITextFieldDelegate> {
    IBOutlet UILabel *helloResponse;
    IBOutlet UILabel *SumCountsResponse;
    IBOutlet UITextField *serverInput;
    IBOutlet UIPickerView *pickerView;
    IBOutlet UILabel *pickerTrap;
    IBOutlet UIAlertView *alert;

    NSMutableArray * pickerViewArray;

    int trapSelected;

}

@property(nonatomic,retain) IBOutlet UILabel *helloResponse; 
@property(nonatomic,retain) IBOutlet UILabel *SumCountsResponse;
@property(nonatomic,retain) IBOutlet UITextField *serverInput;
@property(nonatomic,retain) IBOutlet UIPickerView *pickerView;
@property(nonatomic,retain) IBOutlet UILabel *pickerTrap;
@property(nonatomic,retain) IBOutlet UIAlertView *alert;



- (IBAction)getResponse:(id)sender;
- (IBAction)serverInputReturn:(id)sender;
- (IBAction)backgroundTouched:(id)sender;


@end

m.

#import "SecondViewController.h"

@implementation SecondViewController

@synthesize helloResponse;
@synthesize SumCountsResponse;
@synthesize serverInput;
@synthesize pickerView;
@synthesize pickerTrap;
@synthesize alert;


-(IBAction)serverInputReturn:(id)sender { //resign keyboard on 'return' button

    [sender resignFirstResponder];

}

-(IBAction)backgroundTouched:(id)sender { //resign keyboard on background touch

    [serverInput resignFirstResponder];
}


-(IBAction)getResponse: (id) sender {

    [self serverInputReturn:self]; //trying to call method to resign keyboard first 

    //setup IP call for XMLserver
    NSString *server = serverInput.text;
    NSString *http = @"http://";
    server = [server stringByAppendingString:@":8080/RPC2"];
    server = [http stringByAppendingString:server];

    //Begin calls to XMLRPC server for data return
    XMLRPCRequest *requestHello = [[XMLRPCRequest alloc] initWithHost:[NSURL URLWithString:server]];
    [requestHello setMethod:@"hello" withObjects:[NSArray arrayWithObjects: nil]];
    NSString *resultHello = [self executeXMLRPCRequest:requestHello];
    [requestHello release];


    XMLRPCRequest *requestSumCounts = [[XMLRPCRequest alloc] initWithHost:[NSURL URLWithString:server]];
    [requestSumCounts setMethod:@"SumCountsString" withObjects:[NSArray arrayWithObjects: nil]];
    NSString *resultSumCounts = [self executeXMLRPCRequest:requestSumCounts];
    [requestSumCounts release];


    XMLRPCRequest *requestTrapCountX = [[XMLRPCRequest alloc] initWithHost:[NSURL URLWithString:server]];
    [requestTrapCountX setMethod:@"TrapCountString" withObjects:[NSArray arrayWithObjects: [NSNumber numberWithInt:trapSelected], nil]];
    NSString *resultTrapCountX = [self executeXMLRPCRequest:requestTrapCountX];
    [requestTrapCountX release];


    if (![resultHello isKindOfClass:[NSString class]]){
            alert = [[UIAlertView alloc] initWithTitle:@"Error: Invalid Server Address" message:@"Please Check Server Address and Try Again" delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
            [alert show];
            [alert release];
    }
    else{
        helloResponse.text = resultHello;
        SumCountsResponse.text = resultSumCounts;
        pickerTrap.text = resultTrapCountX;

    }
    }
}


- (id)executeXMLRPCRequest:(XMLRPCRequest *)req {
    XMLRPCResponse *userInfoResponse = [XMLRPCConnection sendSynchronousXMLRPCRequest:req];
    if ([userInfoResponse isKindOfClass:[NSError class]]) {
        return alert;
    }
    else{
    return [userInfoResponse object];
    }
}

Answer 1

Instead of

[self serverInputReturn:self];

Try

[self serverInputReturn:self.serverInput];

You need to pass the UITextField not the UIViewController.

Make sure that you are setting the UITextField's delegate to the UIViewController via

self.serverInput.delegate = self;