Ios xcode抛出“;DetailViewController*”;在尝试实现摄像头功能时发出不兼容类型警告的参数
因此,我正在尝试为我的Objective应用程序实现一个摄像头功能。我有一个Ios xcode抛出“;DetailViewController*”;在尝试实现摄像头功能时发出不兼容类型警告的参数,ios,objective-c,uiimagepickercontroller,Ios,Objective C,Uiimagepickercontroller,因此,我正在尝试为我的Objective应用程序实现一个摄像头功能。我有一个主视图控制器,它有一个表视图。DetailViewController处理查看单元格的详细信息和添加新信息。我的导航栏上有一个摄像头按钮,我想打开系统摄像头,从那里抓取图像 唯一的问题是,出于某种原因,我的UIImagePickerController不允许我将我的DetailViewController设置为代理。这只是在这篇文章的标题中添加了警告。我已经确保委托得到了正确的执行。一篇类似的帖子建议也实现navigat
主视图控制器
,它有一个表视图
。DetailViewController
处理查看单元格的详细信息和添加新信息。我的导航栏上有一个摄像头按钮,我想打开系统摄像头,从那里抓取图像
唯一的问题是,出于某种原因,我的UIImagePickerController
不允许我将我的DetailViewController
设置为代理。这只是在这篇文章的标题中添加了警告。我已经确保委托得到了正确的执行。一篇类似的帖子建议也实现navigationcontrollerdelegate
,所以我就这么做了
就目前情况而言,我认为在我能够正确设置代理之前,相机不会工作。我在这里附上了相关课程的代码:
#import "DetailViewController.h"
#import "MasterViewController.h"
#import "BucketItem.h"
@interface DetailViewController ()
@property (strong, nonatomic) UIPopoverController *masterPopoverController;
- (void)configureView;
@end
@implementation DetailViewController
- (void)dealloc
{
[_detailItem release];
[_masterPopoverController release];
[super dealloc];
}
#pragma mark - Managing the detail item
-(void)setCellForEditing:(UITableViewCell*)cell
{
cellBeingEdited = cell;
}
- (void)setDetailItem:(id)newDetailItem
{
if (_detailItem != newDetailItem) {
[_detailItem release];
_detailItem = [newDetailItem retain];
// Update the view.
[self configureView];
}
if (self.masterPopoverController != nil) {
[self.masterPopoverController dismissPopoverAnimated:YES];
}
}
- (void)configureView
{
// Update the user interface for the detail item.
if(cellBeingEdited != nil)
{
NSUInteger cellNumber = [self.data.bucketItemCells indexOfObject:cellBeingEdited];
BucketItem *item = [self.data.bucketItems objectAtIndex:cellNumber];
titleInputBox.text = item.title;
descriptionInput.text = item.description;
isCompletedSwitch.on = item.isCompleted;
date = item.date;
imageView.image = item.image;
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self configureView];
UIBarButtonItem * doneButton =[[[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemDone target:self action:@selector(saveObject:)] autorelease];
UIBarButtonItem * cameraButton = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemCamera target:self action:@selector(takePicture:)] autorelease];
self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects: doneButton, cameraButton, nil];
}
-(void) takePicture:(id)sender
{
UIImagePickerController *imagePicker = [[UIImagePickerController alloc]init];
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
[imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
}
else
{
[imagePicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
}
DetailViewController *tmp = self;
[imagePicker setDelegate: tmp];
}
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
[imageView setImage:image];
[self dismissViewControllerAnimated:NO completion:nil];
}
-(void) saveObject:(id)sender
{
UIImage *image = nil;
if(imageView.image != nil)
{
image = imageView.image;
}
if(cellBeingEdited == nil)
{
[self.data addNewItemWithTitle: titleInputBox.text
andDescription: descriptionInput.text
thatIsCompleted: isCompletedSwitch.on
withDate: date
withImage: image];
}
else
{
NSUInteger cellNumber = [self.data.bucketItemCells indexOfObject:cellBeingEdited];
BucketItem *item = [self.data.bucketItems objectAtIndex:cellNumber];
item.title = titleInputBox.text;
item.description = descriptionInput.text;
item.isCompleted = isCompletedSwitch.on;
item.date = date;
item.image = image;
[self.data.bucketItemCells replaceObjectAtIndex:cellNumber withObject:[self.data cellWithBucketItem:item]];
}
MasterViewController *vc = [self.navigationController.viewControllers objectAtIndex:0];
[vc.tv reloadData];
[self.navigationController popViewControllerAnimated:YES];
}
-(IBAction) onSwitchToggle:(id)sender
{
if(isCompletedSwitch.on == YES)
{
date = [[NSDate dateWithTimeIntervalSince1970:1.0] retain];
NSDateFormatter *format = [[NSDateFormatter alloc] init];
[format setDateFormat: @"yyyy-MM-dd"];
dateLabel.text =[format stringFromDate: date];
[format release];
}
else
{
date = nil;
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(@"Detail", @"Detail");
}
return self;
}
-(BOOL)textFieldShouldReturn:(UITextField* )aTextField
{
[aTextField resignFirstResponder];
return YES;
}
#pragma mark - Split view
- (void) navigationController: (UINavigationController *) navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
}
-(void) navigationController: (UINavigationController *) navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
}
-(void) imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
}
- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController
{
barButtonItem.title = NSLocalizedString(@"Master", @"Master");
[self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];
self.masterPopoverController = popoverController;
}
- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
// Called when the view is shown again in the split view, invalidating the button and popover controller.
[self.navigationItem setLeftBarButtonItem:nil animated:YES];
self.masterPopoverController = nil;
}
@end
以下是所请求的.h文件:
@interface DetailViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate, UISplitViewControllerDelegate, UITextFieldDelegate>
{
IBOutlet UITextField *titleInputBox;
IBOutlet UITextField *descriptionInput;
IBOutlet UISwitch *isCompletedSwitch;
IBOutlet UILabel *dateLabel;
IBOutlet UIImageView *imageView;
NSDate *date;
UITableViewCell *cellBeingEdited;
}
@property (strong, nonatomic) id detailItem;
@property (readwrite, assign) BucketListDataSource *data;
-(IBAction) onSwitchToggle:(id)sender;
-(void)setCellForEditing:(UITableViewCell*)cell;
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;
-(void) imagePickerControllerDidCancel:(UIImagePickerController *)picker;
@end
@接口详细信息ViewController:UIViewController
{
IBOutlet UITextField*标题输入框;
IBOutlet UITextField*描述输入;
IBUISwitch*是完整的开关;
IBUILabel*日期标签;
IBUIImageView*imageView;
NSDate*日期;
UITableViewCell*已编辑的单元格;
}
@属性(强,非原子)id detailItem;
@属性(读写、分配)BucketListDataSource*数据;
-(iAction)onSwitchToggle:(id)发送方;
-(void)SetCellForEdit:(UITableViewCell*)单元格;
-(void)imagePickerController:(UIImagePickerController*)picker未使用信息(NSDictionary*)信息完成PickingMediaWithInfo;
-(void)ImagePickerController IDCancel:(UIImagePickerController*)选择器;
@结束
很可能您没有声明您的类符合UIImagePickerControllerDelegate
协议。通过更改此行更新您的.m:
@interface DetailViewController ()
致:
应该是:
imagePicker.delegate = self;
更新:既然您已经发布了.h,请注意,您不应该将.h文件中的UIImagePickerControllerDelegate
方法声明为类接口的一部分。添加协议可以为您实现这一点。从.h文件中删除以下内容:
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;
-(void) imagePickerControllerDidCancel:(UIImagePickerController *)picker;
显示.h文件以获取详细信息ViewController请不要发布太多代码。显示给出错误的代码。并显示类接口声明。您肯定不想在私有接口中添加委托声明,而是想将其添加到.h文件中的公共接口中。@为什么?我把尽可能多的钱放进了.m。它很好用。没有理由告诉世界,一个类的实现要求它符合某种协议。除了调用委托方法的控件不限于此文件之外…@这无关紧要。在这种情况下,重要的是编译器知道委托实际上符合正确的协议。我的回答满足了这一需要。试试看。它工作得很好。协议声明在.h文件中@界面详细信息ViewController:UIViewController
imagePicker.delegate = self;
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;
-(void) imagePickerControllerDidCancel:(UIImagePickerController *)picker;