UIScrollView 滚动到特定页面？
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【中文标题】UIScrollView 滚动到特定页面？【英文标题】：UIScrollView scroll upto particular page? 【发布时间】：2014-04-07 09:52:45 【问题描述】：我制作了一个 UIScrollView，我正在向它添加子视图。
但是当我水平滚动它时，它会在 scollview 时传递一些对象。
我的代码是
#pragma mark - profileDataParsingFinish
-(void)profileDataParsingFinish:(MainUserDAO *)mainUserDAO
NSLog(@"Profile Data Parsing Finish ... ");
currentDao=mainUserDAO;
[headerScroll setContentSize:CGSizeMake(3200.0f, 110.0)];
NSString *newStr = [mainUserDAO.statusThumb substringWithRange:NSMakeRange(1, [mainUserDAO.statusThumb length]-1)];
NSURL *imageURL=[[NSURL alloc] initWithString:[NSString stringWithFormat:@"%@%@",serverPart,newStr]];
if([mainUserDAO.CityName isEqualToString:@"(null)"])
else
[livesTitle setText:mainUserDAO.CityName];
[javaTitle setText:mainUserDAO.JobTitle];
if([currentDao.maritialStatusPrivacyId isEqualToString:@"1"])
[maritialIcon setHidden:YES];
[maritialLabel setHidden:YES];
else if([currentDao.maritialStatusPrivacyId isEqualToString:@"2"])
/*
<MaritalStatus><MaritalStatusID>1</MaritalStatusID><Title>Single</Title></MaritalStatus><MaritalStatus><MaritalStatusID>2</MaritalStatusID><Title>Engaged</Title></MaritalStatus><MaritalStatus><MaritalStatusID>3</MaritalStatusID><Title>In a relation</Title></MaritalStatus><MaritalStatus><MaritalStatusID>4</MaritalStatusID><Title>Married</Title></MaritalStatus><MaritalStatus><MaritalStatusID>5</MaritalStatusID><Title>Divorced</Title></MaritalStatus><MaritalStatus><MaritalStatusID>6</MaritalStatusID><Title>Widowed</Title></MaritalStatus><MaritalStatus><MaritalStatusID>7</MaritalStatusID><Title>Not interested</Title></MaritalStatus></ArrayOfMaritalStatus>
*/
if([currentDao.maritialStatusId isEqualToString:@"1"])
[maritialLabel setText:@"Single"];
else
if([currentDao.maritialStatusId isEqualToString:@"2"])
[maritialLabel setText:@"Engaged"];
else
if([currentDao.maritialStatusId isEqualToString:@"3"])
[maritialLabel setText:@"In a relation"];
else
if([currentDao.maritialStatusId isEqualToString:@"4"])
[maritialLabel setText:@"Married"];
else
if([currentDao.maritialStatusId isEqualToString:@"5"])
[maritialLabel setText:@"Divorced"];
else
if([currentDao.maritialStatusId isEqualToString:@"6"])
[maritialLabel setText:@"Widowed"];
else
if([currentDao.maritialStatusId isEqualToString:@"7"])
[maritialLabel setText:@"Not Interested"];
[maritialIcon setHidden:NO];
[maritialLabel setHidden:NO];
// [maritialLabel setText:currentDao.]
// NSData *data=[[NSData alloc]initWithContentsOfURL:imageURL];
//[statusImage setImage:[UIImage imageWithData:data]];
if(mainUserDAO.statusThumb==nil || [mainUserDAO.statusThumb isEqualToString:@""])
else
FavouritImageDownloader *downloder=[[FavouritImageDownloader alloc]init];
[downloder startDownloading:mainUserDAO.statusThumb withButton:statusButton];
if([mainUserDAO.statusMessage isEqualToString:@""] || mainUserDAO.statusMessage==NULL )
[statusLine setText:@"No Status Message Found"];
else
[statusLine setText:mainUserDAO.statusMessage];
int imagex=650;
int imagey=28;
if([mainUserDAO.horoscopeThumb length]<=5 || mainUserDAO.horoscopeThumb==nil || [mainUserDAO.horoscopeThumb isEqualToString:@""] || [mainUserDAO.horoscopeThumb rangeOfString:@"no-image"].length > 0);
else
// imagex=imagex+90;
UILabel *favTite=[[UILabel alloc]initWithFrame:CGRectMake(imagex+5, imagey-20, 100.0f, 15.0f)];
[favTite setTextColor:[UIColor blackColor]];
[favTite setBackgroundColor:[UIColor clearColor]];
[favTite setText:@"Horoscope"];
[headerScroll addSubview:favTite];
[favTite setFont:[UIFont boldSystemFontOfSize:12.0f]];
//UIImageView *horoscopeThumb=[[UIImageView alloc]initWithFrame:CGRectMake(imagex, imagey,77.0f , 77.0f)];
UIButton *horoscopeThumb=[UIButton buttonWithType:UIButtonTypeCustom];
[horoscopeThumb setFrame:CGRectMake(imagex, imagey,77.0f , 77.0f)];
[horoscopeThumb.imageView setContentMode:UIViewContentModeScaleAspectFit];
horoscopeThumb.layer.borderWidth=0.8f;
horoscopeThumb.layer.borderColor=[[UIColor whiteColor]CGColor];
if([currentDao.BirthPrvID isEqualToString:@"1"])
else if([currentDao.BirthPrvID isEqualToString:@"2"])
UILabel *ageLabel=[[UILabel alloc]initWithFrame:CGRectMake(55.0f, 55.0f, 20, 20)];
if(currentDao.Birthdate!=NULL)
[ageLabel setText:[self findDateDifference:currentDao.Birthdate]];
[ageLabel setTextColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"textcolor.png"]]];
[ageLabel setBackgroundColor:[UIColor clearColor]];
//[horoscopeThumb addSubview:ageLabel];
[horoscopeThumb setImage:[UIImage imageNamed:@"Placeholder.png"] forState:UIControlStateNormal];
horoscopeThumb.imageView.layer.borderWidth=0.8f;
horoscopeThumb.imageView.layer.borderColor=[[UIColor whiteColor] CGColor];
[favTite setFont:[UIFont boldSystemFontOfSize:12.0f]];
[headerScroll addSubview:horoscopeThumb];
FavouritImageDownloader *favDownload=[[FavouritImageDownloader alloc]init];
[favDownload startDownloading:currentDao.horoscopeThumb withButton:horoscopeThumb];
// [horoscopeThumb addTarget:self action:@selector(showHoroscopeDetail) forControlEvents:UIControlEventTouchUpInside];
[favDownload release];
if([mainUserDAO.friendThumb length]<=5 || mainUserDAO.friendThumb==nil || [mainUserDAO.friendThumb isEqualToString:@""] || [mainUserDAO.friendThumb rangeOfString:@"no-image"].length > 0);
else
imagex=imagex+112;//2
UILabel *favTite=[[UILabel alloc]initWithFrame:CGRectMake(imagex+10, imagey-20, 70.0f, 15.0f)];
[favTite setTextColor:[UIColor blackColor]];
[favTite setBackgroundColor:[UIColor clearColor]];
[favTite setText:@"F.Friend"];
[favTite setTextAlignment:UITextAlignmentCenter];
[favTite setFont:[UIFont boldSystemFontOfSize:12.0f]];
[headerScroll addSubview:favTite];
UIButton *friendThumb=[UIButton buttonWithType:UIButtonTypeCustom];
[friendThumb setFrame:CGRectMake(imagex, imagey,77.0f , 77.0f)];
friendThumb.imageView.layer.borderWidth=0.8f;
friendThumb.imageView.layer.borderColor=[[UIColor whiteColor] CGColor];
[headerScroll addSubview:friendThumb];
favTite.center = friendThumb.center;
CGRect f = favTite.frame;
f.origin.y = imagey-20; // new y
favTite.frame = f;
FavouritImageDownloader *favdownloader=[[FavouritImageDownloader alloc]init];
[favdownloader startDownloading:currentDao.friendThumb withButton:friendThumb];
[friendThumb addTarget:self action:@selector(showFriendDetail) forControlEvents:UIControlEventTouchUpInside];
...............................// More Code here, I can't paste due to limit of Stack characters
[self.headerScroll scrollRectToVisible:CGRectMake(321,
self.headerScroll.frame.origin.y,
self.headerScroll.frame.size.width,
self.headerScroll.frame.size.height) animated:YES];
当我滚动时，它会省略一些组件。
那么我怎样才能让它滚动到特定位置，它必须滚动。
提前致谢
【问题讨论】：
【参考方案1】：有两种滚动视图方法可以帮助您滚动到特定点或帧。
[scrollview scrollRectToVisible:<#CGRect#>YOURRECT animated:YESORNO];
[scrollview setContentOffset:<#(CGPoint)#>YOURPOINT];
希望这会有所帮助。
【讨论】：
滚动时我需要把它们放在哪里。你能再解释一下吗？ 添加完所有视图后，目前为止不滚动不在我的手中，除了在Delegate方法中处理之外，你有什么建议？ 我猜你正在寻找快速滚动，当你离开滚动它应该捕捉到一个视图，对吧？ 是的.....有三个按钮和图像，我希望它们在用户停止时显示，然后再下三个，再下三个，我也可以计算它们。但我会处理滚动？ 不，你不能处理滚动，但是你可以在滚动结束时捕捉，当视图到达scrollViewDidEndDecelerating委托函数时捕捉视图。以上是关于UIScrollView 滚动到特定页面？的主要内容，如果未能解决你的问题，请参考以下文章