如何实现滚动视图以水平滚动从NSDictionary加载的视图页面。目前我正在使用swipegesture，但这有点慢。
我应该用什么代码来实现水平滚动？
我正在使用此代码：
-(void)DownLoadData:(NSString *)indexSelect
{
{
[[SharedUtilities getInstance]AddActivityIndicatorViewOnMainThread:self.view];
}
self._parserForNewsDetail = [afaqsParser getInstance];
[[afaqsParser getInstance] setCacheNeed:TRUE];
[self._parserForNewsDetail parseWithUrl:[_arrUrlLinks objectAtIndex:[indexSelect integerValue]] UrlTypefor:nil];
NSDictionary *resultDic;
resultDic = [[[self._parserForNewsDetail getLinkAndIdDic] valueForKey:@"items"]objectAtIndex:0];
NSLog(@"Detail Dic = %@",[resultDic description]);
if (resultDic== NULL || resultDic ==nil)
{
//Check internet here
[[SharedUtilities getInstance]RemoveActivityIndicatorView];
[SharedUtilities ShowAlert:@"No Data Found" title:nil withView:self.view];
return;
}
[self performSelectorOnMainThread:@selector(SetValuesInUserInterface:) withObject: resultDic waitUntilDone:NO];
[[SharedUtilities getInstance]RemoveActivityIndicatorView];
}
-(void)SetValuesInUserInterface:(NSDictionary *)Dic
{
self._imageView1.layer.cornerRadius = 4;
self._imageView1.clipsToBounds = YES;
self._imageView1.tag = 999;
NSURL *imgurl =[NSURL URLWithString:[[Dic valueForKey:@"image"] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
self._imageView1.image=[UIImage imageWithData:[NSData dataWithContentsOfURL:imgurl]];
NSArray *subviewsArr = [self.view subviews];
for (int i=0; i<[subviewsArr count]; i++) {
if ([[subviewsArr objectAtIndex:i] isKindOfClass:[ImageDownLoader class]]) {
[[subviewsArr objectAtIndex:i] removeFromSuperview];
}
}
if ([[Dic valueForKey:@"image"] isEqual:@""])
{
// strg=[NSString stringWithFormat:@"%@, ",[Dic valueForKey:@"image"]];
_imageView1.hidden=YES;
// _txtView.frame=CGRectMake(4.0f,95.0f,310.0f,100.0f );
_txtView.frame=CGRectMake(4.0f,95.0f,_txtView.frame.size.width,_txtView.frame.size.height );
NSLog(@"NO IMAGE");
}
else{
_imageView1.hidden=NO;
_imageView1.frame=CGRectMake(4.0f,95.0f,310.0f,180.0f );
_txtView.frame=CGRectMake(4.0f,316.0f,_txtView.frame.size.width,_txtView.frame.size.height );
NSLog(@"IMAGE VISIBLE");
}
self._scrollView.scrollEnabled = YES;
self._scrollView.showsVerticalScrollIndicator = YES;
self._scrollView.showsHorizontalScrollIndicator = YES;
self._header.font = [UIFont fontWithName:@"HelveticaNeue-MediumCond" size:18];
[self._header setText: [Dic valueForKey:@"header"]];
self._header.textColor=[UIColor blackColor];
[self._publicationDate setText:[Dic valueForKey:@"PUB_DATE"]];
[self._kicker setText:[Dic valueForKey:@"kicker"]];
[self._txtView setText:[Dic valueForKey:@"ARTICLE_BODY"]];
NSString *writer;
if ([[Dic valueForKey:@"AUTHOR"] length]>2)
{
writer=[NSString stringWithFormat:@"%@, ",[Dic valueForKey:@"AUTHOR"]];
}
else
{
writer=@"";
}
NSString *city;
if ([[Dic valueForKey:@"REPORTING_CITY"] length]>2)
{
city=[NSString stringWithFormat:@", %@",[Dic valueForKey:@"REPORTING_CITY"]];
}
else
{
city=@"";
}
NSString *str = [NSString stringWithFormat:@"%@ee%@", writer,city];
//[cell._Writer setText: [tempDic valueForKey:@"writer"]];
[self._Writer setText:str];
[_txtView sizeToFit]; //added
[_txtView layoutIfNeeded]; //added
CGRect frame = self._txtView.frame;
self._txtView.frame = frame;
[_txtView setScrollEnabled:NO];
self._scrollView.contentSize = CGSizeMake(320,440+frame.size.height);
_titleLabel.frame= CGRectMake(0, self._scrollView.contentSize.height-119, [[UIScreen mainScreen] bounds].size.width, 40);
_titleLabel.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:1];
_titleLabel.textColor = [UIColor whiteColor];
_titleLabel.textAlignment = NSTextAlignmentCenter;
_titleLabel.font = [UIFont fontWithName:@"Helvetica" size:13.5];
_titleLabel.numberOfLines=2;
[self._scrollView addSubview:_titleLabel];
}
-(void)viewWillAppear:(BOOL)animated
{
self.navigationController.navigationBarHidden = YES;
}
- (void)viewDidLoad
{
[super viewDidLoad];
_titleLabel = [[UILabel alloc] init];
lblTitle.font = [UIFont fontWithName:@"HelveticaNeue-MediumCond" size:20];
lblTitle.text=_strTitle;
NSLog(@"arrUrls %d",[_arrUrlLinks count]);
NSLog(@"strCurrentNewsSelect %@",_strCurrentNewsSelect);
[[NSNotificationCenter defaultCenter]
postNotificationName:@"DISABLEGESTURE"
object:self];
count=[_strCurrentNewsSelect integerValue];
[self performSelectorInBackground:@selector(DownLoadData:) withObject:_strCurrentNewsSelect];
if([_strCurrentNewsSelect isEqualToString:@"0"])
{
btnPreviousNews.userInteractionEnabled=FALSE;
}
else{
}
_lblNewsCount.font = [UIFont fontWithName:@"HelveticaNeue-MediumCond" size:16];
_lblNewsCount.text=[NSString stringWithFormat:@"%d/%d",[_strCurrentNewsSelect integerValue]+1,[_arrUrlLinks count]];
// Do any additional setup after loading the view from its nib.
UIButton *shareBtn = [[UIButton alloc]initWithFrame:CGRectMake(280, 340, 40, 40)];
[shareBtn addTarget:self action:@selector(Share:) forControlEvents:UIControlEventTouchUpInside];
[shareBtn setBackgroundImage:[UIImage imageNamed:@"share1.png"] forState:UIControlStateNormal];
// [self.view addSubview:shareBtn];
if([_strCurrentNewsSelect isEqualToString:@"0"])
{
btnPreviousNews.userInteractionEnabled=FALSE;
[btnPreviousNews setImage:[UIImage imageNamed:@"arrow2_prev.png"] forState:UIControlStateNormal];
}
if([_strCurrentNewsSelect isEqualToString:[NSString stringWithFormat:@"%d",[_arrUrlLinks count]-1]])
{
btnNextNews.userInteractionEnabled=FALSE;
[btnNextNews setImage:[UIImage imageNamed:@"arrow2_next.png"] forState:UIControlStateNormal];
}
UISwipeGestureRecognizer *rightRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(rightSwipeHandle:)];
rightRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
[rightRecognizer setNumberOfTouchesRequired:1];
//add the your gestureRecognizer , where to detect the touch..
[_scrollView addGestureRecognizer:rightRecognizer];
UISwipeGestureRecognizer *leftRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(leftSwipeHandle:)];
leftRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
[leftRecognizer setNumberOfTouchesRequired:1];
[_scrollView addGestureRecognizer:leftRecognizer];
}
- (void)rightSwipeHandle:(UISwipeGestureRecognizer*)gestureRecognizer
{
[self btnPreviousClick];
}
- (void)leftSwipeHandle:(UISwipeGestureRecognizer*)gestureRecognizer
{
NSLog(@"leftSwipeHandle");
[self btnNextClick];
}
-(IBAction)Share:(UIButton *)sender
{
NSLog(@"SHare called =%d",sender.tag);
// NSDictionary *tempDic = [[self._resultDic valueForKey:@"items"] objectAtIndex:sender.tag];
[[SharedUtilities getInstance] set_LinkForSharing:[[[[self._parserForNewsDetail getLinkAndIdDic] valueForKey:@"items"]objectAtIndex:0] valueForKey:@"image"]];
[[SharedUtilities getInstance]set_headerForSharing:[[[[self._parserForNewsDetail getLinkAndIdDic] valueForKey:@"items"]objectAtIndex:0] valueForKey:@"header"]];
[[SharedUtilities getInstance]set_viewController:self];
[[SharedUtilities getInstance]Share];
}
-(IBAction)btnBackPress:(id)sender;
{
[[NSNotificationCenter defaultCenter]
postNotificationName:@"ENABLEGESTURE"
object:self];
[self.navigationController popViewControllerAnimated:YES];
lblTitle.text=_strTitle;
}
-(IBAction)btnNextClick
{
btnPreviousNews.userInteractionEnabled=TRUE;
if(count!=[_arrUrlLinks count] -1)
{
if(count==[_arrUrlLinks count]-2)
{
btnNextNews.userInteractionEnabled=FALSE;
[btnNextNews setImage:[UIImage imageNamed:@"arrow2_next.png"] forState:UIControlStateNormal];
}
[btnPreviousNews setImage:[UIImage imageNamed:@"arrow1_prev.png"] forState:UIControlStateNormal];
count=count +1;
_lblNewsCount.text=[NSString stringWithFormat:@"%d/%d",count+1,[_arrUrlLinks count]];
NSLog(@"next %d",count);
[self performSelectorInBackground:@selector(DownLoadData:) withObject:[NSString stringWithFormat:@"%d",count]];
}
else{
btnNextNews.userInteractionEnabled=FALSE;
}
}
-(IBAction)btnPreviousClick
{
btnNextNews.userInteractionEnabled=TRUE;
if(count==0)
{
btnPreviousNews.userInteractionEnabled=FALSE;
}
else{
if(count==1)
{
[btnPreviousNews setImage:[UIImage imageNamed:@"arrow2_prev.png"] forState:UIControlStateNormal];
btnPreviousNews.userInteractionEnabled=FALSE;
}
[btnNextNews setImage:[UIImage imageNamed:@"arrow1_next.png"] forState:UIControlStateNormal];
count=count-1;
_lblNewsCount.text=[NSString stringWithFormat:@"%d/%d",count+1,[_arrUrlLinks count]];
NSLog(@"previous %d",count);
[self performSelectorInBackground:@selector(DownLoadData:) withObject:[NSString stringWithFormat:@"%d",count]];
}
}
}
答案 0 :(得分：0)
看看UIScrollView。说实话，这个问题让你看起来对这个问题做了很少的研究。您能告诉我们更多关于您目前拥有的以及您迄今为止所做的工作吗？
答案 1 :(得分：0)
UIScrollView Scroll取决于ContentSize。所以你必须设置ContentSize。
用于Horizinatal滚动
[scroll setContentSize:CGSizeMake(1500, scroll.frame.size.height)];
答案 2 :(得分：0)
您是否尝试过以下方法，
UIScrollView * _scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0, 10.0, 320.0, 280.0)];
_scrollView.backgroundColor = [UIColor clearColor];
_scrollView.pagingEnabled = YES;
_scrollView.showsHorizontalScrollIndicator = NO;
_scrollView.showsVerticalScrollIndicator = NO;
_scrollView.scrollsToTop = NO;
_scrollView.delegate = self;
[self addSubview:_scrollView];
float width = 0.0;
for (int i = 0; i < pageCount; i++)
{
UIView * yourView = [[UIView alloc] initWithFrame:CGRectMake((i * 320.0) + 20.0, 0.0, 280.0, 280.0);
[_scrollView addSubview:yourView];
width = yourView.frame.size.width + yourView.frame.origin.x + 20.0;
}
[_scrollView setContentSize:CGSizeMake(width, _scrollView.frame.size.height)];