[英]Scrollview not loading additional Images
我有一个UIView用作简单的入门视图。 我只显示了n
张图像,用户可以在其中滑动。
唯一加载的图像是第一个图像“ OnBoard-1”。 当我调试添加到图像视图的内容时,其他图像在那里。
我究竟做错了什么?
。H
#import <UIKit/UIKit.h>
@interface OnBoardingView : UIView
- (void)setImages:(NSArray *)newImages;
@end
这是.m文件
#import "OnBoardingView.h"
@interface OnBoardingView () <UIScrollViewDelegate>
{
UIPageControl *pageControl;
NSArray *contentImages;
}
@property (nonatomic, retain) UIPageControl *pageControl;
@property (nonatomic, retain) NSArray *contentImages;
@end
@implementation OnBoardingView
@synthesize pageControl;
@synthesize contentImages;
- (id) initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) { }
return self;
}
#pragma mark - Override contentImages setter
- (void)setImages:(NSArray *)newImages {
if (newImages != self.contentImages) {
self.contentImages = newImages;
[self setup];
}
}
#pragma mark - Carousel setup
- (void)setup {
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.frame];
[scrollView setDelegate:self];
[scrollView setShowsHorizontalScrollIndicator:NO];
[scrollView setPagingEnabled:YES];
[scrollView setBounces:NO];
CGSize scrollViewSize = scrollView.frame.size;
for (NSInteger i = 0; i < [self.contentImages count]; i++) {
CGRect slideRect = CGRectMake(scrollViewSize.width * i, 0, scrollViewSize.width, scrollViewSize.height);
UIView *slide = [[UIView alloc] initWithFrame:slideRect];
[slide setBackgroundColor:[UIColor colorWithRed:0 green:0 blue:0 alpha:0]];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:self.frame];
[imageView setImage:[UIImage imageNamed:[self.contentImages objectAtIndex:i]]];
NSLog(@"Image named: %@", [self.contentImages objectAtIndex:i]);
[slide addSubview:imageView];
[scrollView addSubview:slide];
}
UIPageControl *tempPageControll = [[UIPageControl alloc] initWithFrame:CGRectMake(0, scrollViewSize.height - 20, scrollViewSize.width, 20)];
[self setPageControl:tempPageControll];
[self.pageControl setNumberOfPages:[self.contentImages count]];
[scrollView setContentSize:CGSizeMake(scrollViewSize.width * [self.contentImages count], scrollViewSize.height)];
[self addSubview:scrollView];
[self addSubview:self.pageControl];
}
#pragma mark - UIScrollViewDelegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
CGFloat pageWidth = scrollView.frame.size.width;
int page = floor((scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
[self.pageControl setCurrentPage:page];
}
@end
您初始化imageView
与的框架scrollView
,这不是正确的是在任何情况下,可能是你的问题的原因。
顺便说一句:
您的属性处理看起来有些奇怪(为什么要合成而不是仅使用常规属性?),为什么newImages != self.contentImages
按指针比较数组( newImages != self.contentImages
)?
如果要直接在分页中显示图像,则可以分配页数计数,然后将滑动手势(左右)应用于imageview。基于左右滑动,可以更改imageview的图像。
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