以编程方式将UILabels和UIImageView添加到UIScrollView
我知道这个问题在这里讨论了很多,但我似乎仍然无法让它发挥作用。我可能没有正确启动视图或其他什么。。。无论如何,我正在尝试以编程方式向UIScrollView添加几个标签和图像。以下是我的.h文件的代码:以编程方式将UILabels和UIImageView添加到UIScrollView,uiscrollview,uiimageview,uilabel,addsubview,Uiscrollview,Uiimageview,Uilabel,Addsubview,我知道这个问题在这里讨论了很多,但我似乎仍然无法让它发挥作用。我可能没有正确启动视图或其他什么。。。无论如何,我正在尝试以编程方式向UIScrollView添加几个标签和图像。以下是我的.h文件的代码: #import <UIKit/UIKit.h> @interface DOR_HelpViewController : UIViewController <UIScrollViewDelegate> { IBOutlet UIScrollView *scroll
#import <UIKit/UIKit.h>
@interface DOR_HelpViewController : UIViewController <UIScrollViewDelegate> {
IBOutlet UIScrollView *scrollView;
}
@property (nonatomic, retain) IBOutlet UIScrollView *scrollView;
@end
scrollView
链接到我的故事板中的我的UIScrollView
对象。如果你不介意的话,我将非常感谢你告诉我我做错了什么以及为什么。提前感谢~删除scrollView=[[UIScrollView alloc]init]代码>在使用IB时,这是不必要的(甚至会适得其反)
(事实上,这只是评论中的一个想法-见上文。但我尽可能地赢得声誉;-)-(void)addImagesToScrollView:(NSMutableArray*)jsonArray{
如果(!jsonArray | | jsonArray.count==0){
返回;
}
int-imageXPos=0;
int imageWidth=50;
int-imageHeight=50;
对于(int index=0;indexI从不使用IB/故事板,但您确定必须分配/初始化IB中定义的视图吗?即isscrollView=[[UIScrollView alloc]init]有必要吗?不,我不确定。因为我应该试一下,因为那是我正在考虑的事情之一。你能把它作为一个答案吗?我刚把它去掉,它就起作用了。
#import "DOR_HelpViewController.h"
@implementation DOR_HelpViewController
@synthesize scrollView;
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
scrollView = [[UIScrollView alloc] init];
UILabel *pointsCouponLbl = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 20.0, 320.0, 15.0)];
pointsCouponLbl.font = [UIFont boldSystemFontOfSize:14.0];
pointsCouponLbl.textAlignment = UITextAlignmentCenter;
pointsCouponLbl.textColor = [UIColor blackColor];
pointsCouponLbl.backgroundColor = [UIColor clearColor];
pointsCouponLbl.text = @"Points Earned Using a Coupon";
[scrollView addSubview:pointsCouponLbl];
UIImageView *pointsCouponImg = [[UIImageView alloc] initWithFrame:CGRectMake(72, 45, 175, 100)];
pointsCouponImg.image = [UIImage imageNamed:@"couponpoints.png"];
[scrollView addSubview:pointsCouponImg];
UILabel *pointsCheckInLbl = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 165.0, 320.0, 15.0)];
pointsCheckInLbl.font = [UIFont boldSystemFontOfSize:14.0];
pointsCheckInLbl.textAlignment = UITextAlignmentCenter;
pointsCheckInLbl.textColor = [UIColor blackColor];
pointsCheckInLbl.backgroundColor = [UIColor clearColor];
pointsCheckInLbl.text = @"Points Earned For Check-In";
[scrollView addSubview:pointsCheckInLbl];
pointsCheckInLbl = nil;
UIImageView *pointsCheckInImg = [[UIImageView alloc] initWithFrame:CGRectMake(72, 190, 175, 100)];
pointsCheckInImg.image = [UIImage imageNamed:@"checkinpoints.png"];
[scrollView addSubview:pointsCheckInImg];
pointsCheckInImg = nil;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - View lifecycle
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
@end
-(void)addImagesToScrollView:(NSMutableArray*)jsonArray{
if (!jsonArray || jsonArray.count ==0) {
return;
}
int imageXPos=0;
int imageWidth=50;
int imageHeight=50;
for (int index=0; index<[jsonArray count]; index++)
{
NSMutableDictionary *dict=[jsonArray objectAtIndex:index];
NSString *thumbUrl=[JsonUtil getString:dict forKey:@"thumb"];
UIImageView *imageView = [[UIImageView alloc] init ];
[imageView setImageWithURL:[NSURL URLWithString:thumbUrl]
placeholderImage:[UIImage imageNamed:@"place_image"]];
imageView.contentMode = UIViewContentModeScaleToFill;
imageView.clipsToBounds = YES;
imageView.frame = CGRectMake(imageXPos,1, imageWidth, imageHeight);
[self.placeImageScrollView addSubview:imageView];
imageXPos = imageXPos + imageView.frame.size.width +2;//2 is padding
}
self.placeImageScrollView.contentSize = CGSizeMake(imageXPos, self.placeImageScrollView.frame.size.height);
}