小编eto*_*toy的帖子

我有一个UIImageView包含在内UIScrollView.图像(通常)很大,因此用户可以将其缩小以查看整个图像.

但是,在缩小时,将其UIScrollView捕捉ImageView到滚动视图的左上角.我希望用户可以定位它,并且还没有找到"关闭它"的方法.

它有点像总是允许滚动,而不是只允许在图像放大时滚动.也许它太重要了？

有人知道吗？最初,我只是想手动创建这个功能.但UIImageViews不喜欢调整到新的大小(我已经尝试了所有的东西,无法UIImageView调整大小,除非我从中删除图片imageView,更改框架,然后重新添加).

我有一个viewcontroller和uicollectionview它在里面.

我使用了以下代码,但没有可见的图像uicollectionview,只有黄色框:

myviewcontroller.h

{
IBOutlet UICollectionView *gallery1;
//IBOutlet UIImage *inimage;
NSArray *recipePhotos;
}

@property (nonatomic, retain) IBOutlet UICollectionView *gallery1;
//@property (nonatomic, retain) IBOutlet UIImage *inimage;

和myviewcontroller.m

- (void)viewDidLoad
{
[super viewDidLoad];

recipePhotos = [NSArray arrayWithObjects:@"im1.png","im2.png", "im3.png", "im4.png", "im5.png", "im6.png",  nil];

UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];
[flowLayout setItemSize:CGSizeMake(100, 100)];
[flowLayout setScrollDirection:UICollectionViewScrollDirectionVertical];
[self.gallery1 setCollectionViewLayout:flowLayout];
[self.gallery1 setAllowsSelection:YES];
self.gallery1.delegate=self;
}

- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection: (NSInteger)section {
return recipePhotos.count;
}

- (NSInteger)numberOfSectionsInCollectionView: (UICollectionView *)collectionView {
return 1;
} …

我想把2 UIPickerViews合二为一ViewController.每个UIPickerView都有不同的数据阵列.我正在使用界面构建器来链接拾取器.我知道我将不得不使用单独的委托和dataSources,但我似乎无法正确地连接接口构建器.这是我的所有代码:

pickerTesting.h

#import <UIKit/UIKit.h>
#import "picker2DataSource.h"

@interface pickerTestingViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>{

IBOutlet UIPickerView *picker;
IBOutlet UIPickerView *picker2;
NSMutableArray  *pickerViewArray;
}

@property (nonatomic, retain) IBOutlet UIPickerView *picker;
@property (nonatomic, retain) IBOutlet UIPickerView *picker2;
@property (nonatomic, retain) NSMutableArray *pickerViewArray;
@end

pickerTesting.m

#import "pickerTestingViewController.h"

@implementation pickerTestingViewController

@synthesize picker, picker2, pickerViewArray;


- (void)viewDidLoad
 {
[super viewDidLoad];
pickerViewArray = [[NSMutableArray alloc] init];

[pickerViewArray addObject:@" 100 "];
[pickerViewArray addObject:@" 200 "];
[pickerViewArray addObject:@" 400 "];
[pickerViewArray addObject:@" 600 "]; …

在我的项目中,我必须将a的长度限制UITextField为6个字符.这工作绝对正常.一旦我结束编辑并再次开始编辑,我点击退格我的应用程序崩溃.

这是代码:

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string 
{   
    NSUInteger newLength = [txtLicense.text length] + [strNumber length] - range.length;
    return (newLength > 6) ? NO : YES;
}

我有一个横向UIScrollView分页.有两个按钮.一个向左滚动scrollView到另一个向右.

左边的代码:

- (IBAction)goLeftAction:(id)sender
{
    CGFloat pageWidth = _theScrollView.frame.size.width;
    int page = floor((_theScrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
    if(page>0){
        page -=1;
        [_theScrollView scrollRectToVisible:CGRectMake(_theScrollView.frame.size.width*page, 0, self.view.frame.size.width, self.view.frame.size.height) animated:YES];
    }
}

scrollView当我们在第一页(页面= 0)并按下左键时,我希望按钮使显示弹跳效果.

请帮助找到实现这一目标的方法.

编辑:

如果有人需要,这是代码.

首先我加入了 goLeftAction:

[_theScrollView setPagingEnabled:NO];
[_theScrollView setScrollEnabled:NO];
[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(bounceScrollView) userInfo:nil repeats:NO];

接下来:

- (void)bounceScrollView
{
    [self.theScrollView scrollRectToVisible:CGRectMake(100, 0, self.view.frame.size.width, self.view.frame.size.height) animated:YES];
    [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(unbounceScrollView) userInfo:nil repeats:NO];
}
- (void)unbounceScrollView
{
    [self.theScrollView scrollRectToVisible:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) animated:YES]; …

我希望有一UIScrollView组子视图,其中每个子视图都有UITextView一个不同的文本.对于这个任务,我修改了PageControl苹果"iphone dev center"中的示例,以便将其添加UITextView到视图中,该视图用于生成滚动视图的子视图.当我运行应用程序(在模拟器和手机上)时,看不到文本,但如果我激活"用户交互"并单击它,文本会神奇地出现(以及键盘).

有没有人有解决方案或在UITextView内部取得任何进展UIScrollView？谢谢.

我能够创建一个tableviewwith textlabel和with detaillabeltext.

除此之外,是否可以添加UIButton到单元格中.

我的意思是在详细说明后,我可以放置一个UIButton(如"删除"按钮)

目前我有以下代码

// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
//-----------------------------------------------------------------------------------------------------
{

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    profileName = [appDelegate.sentItemsList objectAtIndex:indexPath.row];

    if (cell == nil) 
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];

        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }

    NSString *subjectData = [profileName.sent_subject stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]];

    cell.textLabel.text = [NSString stringWithFormat: @"%@ ", subjectData];

    cell.textLabel.font = [UIFont boldSystemFontOfSize:13];


    NSString *CompanyName …

我正在按照教程进行溢出UICollectionView.此外,我想对物品进行选择,然后是新的外观UIViewController.

我可以知道如何做到这一点？我可以UITable选择选择索引= 0,1或2等吗？代码显示正确,NSLog但没有去其他UIViewController

 - (void)tapCell:(UITapGestureRecognizer *)inGestureRecognizer
{
    NSIndexPath *theIndexPath = [self.collectionView indexPathForCell:(UICollectionViewCell *)inGestureRecognizer.view];

    if (theIndexPath.row ==0) {
        NSLog(@"****");
        page *noteDetailViewControler = [[page alloc] initWithNibName:@"page" bundle:nil];    }
}

这是完整的代码:

@implementation CDemoCollectionViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.cellCount = 10;
    self.imageCache = [[NSCache alloc] init];

    [self.collectionView registerNib:[UINib nibWithNibName:NSStringFromClass([CCoverflowTitleView class]) bundle:NULL] forSupplementaryViewOfKind:@"title" withReuseIdentifier:@"title"];

    NSMutableArray *theAssets = [NSMutableArray array];
    NSURL *theURL = [[[NSBundle mainBundle] resourceURL] URLByAppendingPathComponent:@"Images"];
    NSEnumerator *theEnumerator = [[NSFileManager defaultManager] enumeratorAtURL:theURL includingPropertiesForKeys:NULL options:NSDirectoryEnumerationSkipsPackageDescendants | …

我有一个UIAlertView带有2个按钮的重新加载按钮 - 确定和取消.取消按钮工作正常,但是当我想要一些动作(再次玩游戏)OK按钮不起作用,除非该动作是一个NSLog.

我的代码是m.文件:

- (IBAction)startAgainAction:(id)sender {

    UIAlertView *alert = [[UIAlertView alloc] 
                         initWithTitle:@"Warning" message:@"Have you short that want start again the game?" 
                         delegate:self 
                         cancelButtonTitle:@"OK" 
                         otherButtonTitles:@"Cancel", nil];

    [alert show];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {

    // My OK button

    if (buttonIndex == alertView.cancelButtonIndex) {

        // Action to start the game again... (don't work)
        [self viewDidLoad];

    } else if (buttonIndex == alertView.firstOtherButtonIndex) {

        // NSLog it's accept but not other actions...
        NSLog(@"Cancel");
    }

}

是的,我把UIAlertViewDelegate协议放在了h.文件

那么,为什么 …