我是iOS开发的新手，目前正在为uni中的主要项目创建一个应用程序。我正在创建一个注册页面，要求用户填写他们的详细信息并上传图像。到目前为止，我已经将值传递到数据库，但我无法弄清楚如何添加图像选择器选择的图像。任何人都可以帮忙吗？代码发布在下面......
RegistrationViewController.h
#import <UIKit/UIKit.h>
#define kpostURL @"http://myurl.com/myphp.php"
#define kfname @"fname"
#define ksname @"sname"
#define kemail @"email"
#define kusername @"username"
#define kpassword @"password"
#define kinstrument @"instrument"
#define klocation @"location"
@interface registrationViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate> {
UIScrollView *scrollView_;
BOOL keyboardVisible_;
IBOutlet UITextField *fnameText;
IBOutlet UITextField *snameText;
IBOutlet UITextField *emailText;
IBOutlet UITextField *usernameText;
IBOutlet UITextField *passwordText;
IBOutlet UITextField *instrumentText;
IBOutlet UITextField *locationText;
IBOutlet UIImageView *ImageView;
IBOutlet UIButton *button;
NSURLConnection *postConnection;
}
@property (nonatomic, retain) UIImagePickerController *imagePicker;
@property (nonatomic, strong) IBOutlet UIScrollView *scrollView;
- (IBAction) pickImage:(id)sender;
- (IBAction) textFieldDoneEditing: (id) sender;
-(IBAction)post:(id)sender;
-(void) postMessage:(NSString*) location withName:(NSString *) fname withSurname:(NSString *) sname withEmail:(NSString *) email withUsername:(NSString *) username withPassword:(NSString *) password withInstrument:(NSString *) instrument;
- (void) keyboardDidShow:(NSNotification *)notif;
- (void) keyboardDidHide:(NSNotification *)notif;
@end
RegistrationViewController.m
#import "registrationViewController.h"
#import <QuartzCore/QuartzCore.h>
@implementation registrationViewController
@synthesize imagePicker;
@synthesize scrollView=scrollView_;
- (IBAction)textFieldDoneEditing:(id)sender {
[sender resignFirstResponder];
}
- (IBAction)pickImage:(id)sender {
imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.allowsEditing = YES;
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:imagePicker animated:YES];
}
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo{
ImageView.image = image;
[imagePicker dismissModalViewControllerAnimated:YES];
}
- (void) imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[imagePicker dismissModalViewControllerAnimated:YES];
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
}
-(void) postMessage:(NSString*) location withName:(NSString *) fname withSurname:(NSString *) sname withEmail:(NSString *) email withUsername:(NSString *) username withPassword:(NSString *) password withInstrument:(NSString *) instrument{
if (fname != nil && location != nil && sname !=nil && email !=nil && username !=nil && password !=nil && instrument !=nil){
NSMutableString *postString = [NSMutableString stringWithString:kpostURL];
[postString appendString:[NSString stringWithFormat:@"?%@=%@", kfname, fname]];
[postString appendString:[NSString stringWithFormat:@"&%@=%@", ksname, sname]];
[postString appendString:[NSString stringWithFormat:@"&%@=%@", kemail, email]];
[postString appendString:[NSString stringWithFormat:@"&%@=%@", kusername, username]];
[postString appendString:[NSString stringWithFormat:@"&%@=%@", kpassword, password]];
[postString appendString:[NSString stringWithFormat:@"&%@=%@", kinstrument, instrument]];
[postString appendString:[NSString stringWithFormat:@"&%@=%@", klocation, location]];
[postString setString:[postString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:postString]];
[request setHTTPMethod:@"POST"];
postConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
}
}
-(IBAction)post:(id)sender{
[self postMessage:locationText.text withName:fnameText.text withSurname:snameText.text withEmail:emailText.text withUsername:usernameText.text withPassword:passwordText.text withInstrument:instrumentText.text];
[locationText resignFirstResponder];
fnameText.text = nil;
snameText.text = nil;
emailText.text = nil;
usernameText.text = nil;
passwordText.text = nil;
instrumentText.text = nil;
locationText.text = nil;
[[NSNotificationCenter defaultCenter] postNotificationName:@"Test1" object:self];
}
- (void)viewDidUnload
{
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)viewWillAppear:(BOOL)animated
{
NSLog(@"%@", @"Registering for keyboard events...");
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHide:) name:UIKeyboardDidHideNotification object:nil];
keyboardVisible_ = NO;
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
NSLog(@"%@", @"Unregistering for keyboard events...");
[[NSNotificationCenter defaultCenter] removeObserver:self];
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#pragma mark -
#pragma mark Keyboard handlers
- (void) keyboardDidShow:(NSNotification *)notif {
NSLog(@"%@", @"Received UIKeyboardDidShowNotification");
if (keyboardVisible_) {
NSLog(@"%@", @"Keyboard is already visible. Ignoring notifications.");
return;
}
// The keyboard wasn't visible before
NSLog(@"Resizing smaller for keyboard");
// Get the origin of the keyboard when it finishes animating
NSDictionary *info = [notif userInfo];
NSValue *aValue = [info objectForKey:UIKeyboardFrameEndUserInfoKey];
// Get the top of the keyboard in view's coordinate system.
// We need to set the bottom of the scrollview to line up with it
CGRect keyboardRect = [aValue CGRectValue];
keyboardRect = [self.view convertRect:keyboardRect fromView:nil];
CGFloat keyboardTop = keyboardRect.origin.y;
// Resize the scroll view to make room for the keyboard
CGRect viewFrame = self.view.bounds;
viewFrame.size.height = keyboardTop - self.view.bounds.origin.y;
self.scrollView.frame = viewFrame;
keyboardVisible_ = YES;
}
- (void) keyboardDidHide:(NSNotification *)notif {
NSLog(@"%@", @"Received UIKeyboardDidHideNotification");
if (!keyboardVisible_) {
NSLog(@"%@", @"Keyboard already hidden. Ignoring notification.");
return;
}
// The keyboard was visible
NSLog(@"%@", @"Resizing bigger with no keyboard");
// Resize the scroll view back to the full size of our view
self.scrollView.frame = self.view.bounds;
keyboardVisible_ = NO;
}
@end
提前致谢：）
答案 0 :(得分：0)
这是我在NSMutableURLRequest上创建的类别：
@interface NSMutableURLRequest (SendFormData)
-(void)sendFormData:(NSDictionary *)data;
@end
@implementation NSMutableURLRequest (SendFormData)
-(void)sendFormData:(NSDictionary *)data{
// add boundary
NSMutableString *boundary = [NSMutableString stringWithString:@"----Boundary+"];
// append 5 random chars to the end of the boundary
for(int i = 0; i < 5; i++){
BOOL lowercase = arc4random() % 2;
if(lowercase){
[boundary appendFormat:@"%c", (arc4random() % 26) + 97];
} else{
[boundary appendFormat:@"%c", (arc4random() % 26) + 65];
}
}
// create body data
NSMutableData *body = [[NSMutableData alloc] init];
self.HTTPMethod = @"POST";
[self setValue:[NSString stringWithFormat:@"multipart/form-data, boundary=%@", boundary] forHTTPHeaderField:@"Content-Type"];
for(NSString *currentKey in [data allKeys]){
id currentObject = [data objectForKey:currentKey];
if([currentObject class] == [UIImage class]){
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"myphoto.png\"\r\n", currentKey] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"Content-Type: image/x-png\r\n" dataUsingEncoding:NSASCIIStringEncoding]];
[body appendData:[@"Content-Transfer-Encoding: binary\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:UIImagePNGRepresentation(currentObject)];
[body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
} else{
[body appendData:[[NSString stringWithFormat:@"--%@\r\nContent-Disposition: form-data; name=\"%@\"\r\n\r\n%@\r\n", boundary, currentKey, currentObject] dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO]];
}
}
self.HTTPBody = body;
}
@end
只需传递参数的NSDictionary和参数'对象，它就会创建您的请求，然后您可以传递给NSURLConnection。
或者您可以选择查看ASIFormDataRequest（https://github.com/pokeb/asi-http-request/tree）。