小编Spo*_*ude的帖子

我需要将初始日期设置为"今天"之外的其他内容,以便用户进行选择.我发现如果用户没有做出选择,则日期/时间设置为"nil"; 我可以发送一个UIAlertView,但事实就是如此.

我看过SO和Google,但一无所获.我怎样才能做到这一点？

更新:实际上,我没有说明,但是没有显示年份,只有月份,日期和上午/下午.没有这一年,他们可能看不到未来的约会.Ť

我有一个iPhone应用程序,我目前正在使用Storyboard在XCode 4.3中构建.我有一个"根"视图控制器,两个(2)seques到包含UIWebView的视图控制器.我希望能够识别segue(已经为两个segue设置了唯一标识符),因此我可以根据在"根"视图控制器中激活了哪个segue,将正确的内容"推送"到UIWebView.

我想我必须使用"prepareForSegue"方法,但不知道它会去哪里.我在哪里可以找到如何处理两个segues到同一个视图控制器？(我已经谷歌了,发现没有什么适合我的情况).

这是我正在使用的代码:

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"helpSegue"]) {
        NSLog(@"helpSegue");
    }
    else if ([segue.identifier isEqualToString:@"reportSegue"]) {
        NSLog(@"reportSegue");
    }
}

我有这个代码,它应该将HTML文件附加到电子邮件中,并且还在电子邮件正文中显示HTML文件的内容.HTML文件中引用了一个图像(reading.png),每隔一行显示一次.但是,它不会显示在电子邮件正文中.我需要做些什么才能让它显示出来？

if ([MFMailComposeViewController canSendMail])  {

    MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];
    mailer.mailComposeDelegate = self;  //  set delegate to notify us what's happen'in

    [mailer setSubject:[NSString stringWithFormat: @"Site Readings for: %@", gSiteID.globalSiteID]];

    //  add the image for the HTML
    UIImage *toolImage = [UIImage imageNamed:@"reading.png"];
    NSData *imageData = UIImagePNGRepresentation(toolImage);
    [mailer addAttachmentData:imageData mimeType:@"image/png" fileName:@"reading.png"]; 

    // attach file
    NSString *file = [[NSBundle mainBundle] pathForResource:@"Surveyor" ofType:@"txt"];
    NSData *surveyorTxt= [NSData dataWithContentsOfFile: file];
    [mailer addAttachmentData: surveyorTxt mimeType:@"text/html" fileName: @"Surveyor.txt"];

    //  display the file in the body of the …

我试图使用MagicalRecord设置Core Data的轻量级迁移.我使用Google和SO查看了有关此主题的所有帖子.我理解persistentStoreCoordinator如何工作以及我想要做的设置也是如此.

这是我的代码:

AppDeligate.h

NSPersistentStoreCoordinator *persistentStoreCoordinator;

AppDelegate.m

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {

if (persistentStoreCoordinator != nil) {
    return persistentStoreCoordinator;
}

NSURL *storeUrl = [NSURL fileURLWithPath: [[self applicationDocumentsDirectory] stringByAppendingPathComponent: @"saori.sqlite"]];

// handle db upgrade
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                         [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
                         [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];

NSError *error = nil;
persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: [self managedObjectModel]];

if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:options error:&error]) {

    // Handle error
}

return persistentStoreCoordinator;

}

我得到以下错误,我理解; 我不知道的是这些对象在哪里(我在我的应用程序中查找,并没有找到任何内容):

'AppDelegate'没有可见的@interface声明选择器'applicationDocumentsDirectory'和

'AppDelegate'没有可见的@interface声明选择器'managedObjectModel'

我已经创建了商店:

大多数,如果不是所有我看过的代码都是相似的; 我不知道MagicalRecord是否会为我处理这个问题,因为我找不到任何可以指示如何使用MR执行此操作的文档.我的问题是:我需要做些什么来完成这项工作？

我将此代码放在UIVIewController(XCode 6.1,iOS 8.1.1)中:

[UIAlertController showActionSheetInViewController:self
                         withTitle:@"Test Action Sheet"
                         message:NSLocalizedString(@"Are you sure you want to delete ALL appointments?",nil)
                         cancelButtonTitle:@"Cancel"
                         destructiveButtonTitle:@"Yes"
                         otherButtonTitles:@[@"No"]  //  same as Cancel
                         tapBlock:^(UIAlertController *controller, UIAlertAction *action, NSInteger buttonIndex){
                              if (buttonIndex == UIAlertControllerBlocksCancelButtonIndex) {
                                 NSLog(@"Cancel Tapped");
                             } else if (buttonIndex == UIAlertControllerBlocksDestructiveButtonIndex) {
                                 NSLog(@"Delete Tapped");
                             } else if (buttonIndex >= UIAlertControllerBlocksFirstOtherButtonIndex) {
                                 NSLog(@"Other Action Index %ld", (long)buttonIndex - UIAlertControllerBlocksFirstOtherButtonIndex);
                             }
                         }];

当我运行它时,我得到这个运行时错误:

*** Terminating app due to uncaught exception 'NSGenericException', reason: 'Your application has presented a UIAlertController (<UIAlertController: 0x7fdfe3324f00>) …

这是我的代码:

NSPredicate *filter = [NSPredicate predicateWithFormat:@"aMostRecentFlag == 1"];  //  find old records
NSFetchRequest *fetchRequest = [PreferenceData MR_requestAllWithPredicate: filter];
[fetchRequest setResultType: NSDictionaryResultType];

NSDictionary *preferenceData = [PreferenceData MR_executeFetchRequest:fetchRequest];

我从构建中收到警告:

Incompatible pointer types initializing 'NSDictionary *' with an expression of type 'NSArray *'

这表明MR没有按照文件记录返回NSDictionary; 我的代码有问题吗？顺便说一下,获取请求不会返回任何内容,尽管应该有一条记录.

我有一个现有的iPhone应用程序(iOS6,ARC,Storyboards,XCode5),我试图转换为通用.我做了一个复制和过渡到iPad,然后做了一个构建.这就是我得到的:

编译失败.无法写入路径:/ Users/sd/Documents/iPhone Apps/SurveyorLevelingI/DerivedData/SurveyorLevelingI/Build/Products/Debug-iphoneos/SurveyorLevelingI.app/en.lproj/MainStoryboard.storyboardc

我已将DerivedData文件夹移动到项目,清理项目,关闭XCode 5,检查DerivedData文件夹(它的777)的权限都无济于事.

接下来要检查什么的想法？

我有一个有多个版本的iPad应用程序; 我目前正在研究v2.1.1,我从远程存储库中检出了它.这是我点击源代码管理时看到的内容.这是什么意思,我该如何解决？

I have an app that has about 11 different Singleton instances used throughout the many app's methods and classes; it's getting out of hand, and I want to replace all of them with dependency injection, like Typhoon. However, I am unable to find any doc, sample or mention of how to replace the singletons with dependency injection, including Typhoon. For instance, do I use multiple instances of Typhoon, replacing each singleton with an instance of Typhoon?

我有一些代码正在处理我的某个应用程序; 所以我复制了代码,进行了必要的更改(即textField名称等),除非我将其移动到UIImageView,否则它会起作用; 没有出现.这是我的代码:

viewController.h(为简洁起见,仅显示相关部分)

#import "AppDelegate.h"
#import "Books.h"
#import <AVFoundation/AVFoundation.h>
#import "MBProgressHUD.h"
#import <MobileCoreServices/MobileCoreServices.h>
#import <UIKit/UIKit.h>

@class Books;

@interface DetailViewController : UIViewController <UITextFieldDelegate,
    UIPopoverControllerDelegate,
    UIPickerViewDataSource,
    UIPickerViewDelegate,
    UIActionSheetDelegate,
    UIScrollViewDelegate,
    UIImagePickerControllerDelegate,
    AVCaptureMetadataOutputObjectsDelegate>  {
}

//  UIView
@property (strong, nonatomic) IBOutlet UIView *bookDetailView;

//  camera stuff
@property (strong, nonatomic) IBOutlet UIImageView *oBookImage;
- (IBAction)bOpenCamera:(UIButton *)sender;

这是相关的viewController.m代码:

#pragma mark -  Camera stuff
- (IBAction)bOpenCamera:(UIButton *)sender {

if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])  {

    UIImagePickerController *imagePicker = [UIImagePickerController new];
    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    imagePicker.mediaTypes = [NSArray arrayWithObjects: (NSString …