小编Spo*_*ude的帖子

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 …

这是我的代码:

//--   check for d/b; create it if it doesn't exist
NSString *docsDir;
NSArray *dirPaths;

NSMutableArray *sqliteArray = [NSMutableArray array];
[sqliteArray addObject: @"CREATE TABLE IF NOT EXISTS SiteData (SITE_ID TEXT PRIMARY KEY NOT NULL, STA1 TEXT "
    "TBM TEST, SITE_DESC TEXT, REMARKS TEXT, LOOP_COUNT INTEGER, DATE TEXT)" ];
[sqliteArray addObject: @"INSERT INTO SiteData (SITE_ID, LOOP_COUNT) VALUES('','')"];
[sqliteArray addObject: @"CREATE TABLE Readings (SITE_ID TEXT REFERENCES SiteData, LOOP_NBR TEXT, LOOP_CLOSED BINARY, "
    "SEQ INTEGER, STA TEXT, BS TEXT, FS TEXT, DESC TEXT, …

可能重复:
如何编写包含多个参数的方法/消息？

我在这里真的很困惑......我看过SO和Google,在那里我找到了一个用两个参数调用方法的例子.所以我修改了它供我使用,不幸的是我无法让它工作.这是我更新的代码:

-  definition of method
- (NSArray *) fetchEventsBetweenDates: (NSDate *) sDate: andDate: (NSDate *) eDate;

- definitions and creation of sD and eD
    //  convert start dates to NSDate
    NSDateFormatter* df = [[NSDateFormatter alloc] init];
    [df setDateFormat:@"MM/dd/yyyy"];
    NSDate* sD = [df dateFromString:@"10/03/2012"];
    NSLog(@"startDate: %@", sD);

    //  convert end dates to NSDate
    NSDate* eD = [df dateFromString:@"10/05/2012"];
    NSLog(@"endDate: %@", eD);

- call to method
    [self.eventsList addObjectsFromArray:[self fetchEventsBetweenDates: sD andDate: eD]];

- method
- (NSArray *) fetchEventsBetweenDates: (NSDate *) …

我正在使用FMDB创建并向ad/b添加记录.创建d/b的方法是:

//-----------------------    checkIfDatabaseExists    -----------------|
+ (void) openCreateDB  {

    NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  // Get the path to the database file
    NSString *documentPath = [searchPaths objectAtIndex:0];
    NSString *databasePath = [documentPath stringByAppendingPathComponent:@"ppcipher.s3db"];
    NSLog(@"d/b path: /%@", databasePath);

    char * errmsg = nil;   

    NSFileManager *fileManager = [NSFileManager defaultManager];
    [fileManager removeItemAtPath:databasePath error:NULL];  //  <------------  delete d/b  TESTING ONLY! 

    BOOL fileExists = [fileManager fileExistsAtPath:databasePath];
    if(!fileExists)  {
        FMDatabase* _db = [FMDatabase databaseWithPath: databasePath]; 

        if (![_db open]) {
            NSLog(@"Could not open/create database");
        }

        [_db executeUpdate:@"CREATE TABLE …

我有一些代码在UITextView周围设置边框.它在一个类中正确构建; 当我接受该代码并将其复制到另一个类(更改对象名称)时,它不再构建,说"在前向类对象'CALayer*'中找不到"属性'borderWidth'(其他两行的相同消息)代码).我做了一个干净的,重新构建,没有任何帮助.为什么会这样？以及如何解决？

- (void)viewDidLoad  {
[super viewDidLoad];

//--  draw box around notes field
orderNotes.layer.borderWidth = 1.0f;
orderNotes.layer.borderColor = [[UIColor blackColor] CGColor];
orderNotes.layer.cornerRadius = 4; 

}

对象"orderNotes"定义为UITextView.没有其他错误.

这是我的SQLite数据库的结构:

我试图删除属于选择OrderInfo.Cust_ID的所有OrderData,它属于特定的CustData.Cust_ID.这是我的DELETE语句,它给出了错误:"没有这样的列:CustData.Customer_ID"

DELETE FROM OrderData
   WHERE CustData.Customer_ID = OrderInfo.Cust_ID 
   AND OrderData.Order_ID = OrderInfo.Order_ID 
   AND CustData.Bus_Name = 'Albertsons' 

我知道SQLite不支持DELETE语句中的JOIN,所以我留下了WHERE和ANDs; 有人可以告诉我正确的方法吗？

我有一个UIWebView,我在其中显示一个包含外语内容的HTML文件(在本例中为法语),由Google翻译.

原文英文是:

清除 - 用于停止所有计时器并清除显示在视图最右侧的数量.

谷歌的翻译是这样的:

Effacer - permetd'arrêter的旅游景点和旅游景点,其中包括de la vue.

当法语是本地化语言时,这就是iPhone模拟器中显示的内容:

这是我用来加载它的代码:

//  determine what the language for this locale is...
NSString *sysLangCode = [[NSLocale preferredLanguages] objectAtIndex:0];

//  contatenate the language code to the filename
NSURL *indexURL = [[NSBundle mainBundle] URLForResource: [NSString stringWithFormat:@"instRST-%@", sysLangCode]
                withExtension:@"html"];

//  load it...
[webView loadRequest:[NSURLRequest requestWithURL:indexURL]];

我查看过谷歌,SO和UIWebView,找到任何可以正确渲染的设置.使用的字体是Verdana.

我该怎么做才能正确渲染？

我的应用程序适用于使用两个场景的故事板的iPad.在一个场景中,我有一个包含UIVIew的UIScrollView.它滚动,但立即反弹,使自己无用.UIScrollView的大小是768x590; UIView的大小是768x1590; UIScrollView的ContentSize为768x590.这是UIScrollView设置的图像:

(我在过去的6个小时里看过SO和Google,尝试了很多东西,但没有任何效果.我也做了几次CMD + Option + K(Clean),但这也没有用.

为什么它不能正确滚动？

我有一个iPad应用程序(XCode 4.6,iOS 6.2,Storyboards,ARC),我创建了一个UIViewController(未连接到任何segue),用于UIPopover.这些是ViewController设置:

我有这个代码,应该在UIPopover中显示"viewForPopover"ViewController.

        UIView *anchor = textField;
    UIViewController *viewControllerForPopover =
    [self.storyboard instantiateViewControllerWithIdentifier:@"viewForPopover"];

    popover = [[UIPopoverController alloc]
               initWithContentViewController:viewControllerForPopover];
    [popover presentPopoverFromRect:anchor.frame
                             inView:anchor.superview
           permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

我的问题是:没有self.storyboard.那么我该如何到达当前类之外的视图控制器呢？(当前课程是UIView的子视图)

我有一个iPad应用程序(XCode5,ARC,Storyboards,iOS 7).这是问题(占位符和光标位于UITextField的中间):

这是创建它的代码:

- (IBAction)bSendFeedback:(UIButton *)sender {

//  make the popover
UIViewController* popoverContent = [[UIViewController alloc] init];
UIView* popoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 450, 500)];
popoverView.backgroundColor = [UIColor colorWithWhite:(CGFloat)1.0 alpha:(CGFloat)1.0];  //  frame color?
popoverContent.view = popoverView;

//resize the popover view shown in the current view to the view's size
popoverContent.contentSizeForViewInPopover = CGSizeMake(450, 500);

//  add the UITextfield to the popover
UITextField *tf = [[UITextField alloc]initWithFrame:CGRectMake(0, 0, 450, 500)];
[tf becomeFirstResponder];
tf.delegate = self;
tf.tag = kSendFeedback;
tf.placeholder = @" …