Scrollview不加載其他圖像

Question

我有一個UIView用作簡單的入門視圖。 我只顯示了n張圖像，用戶可以在其中滑動。

唯一加載的圖像是第一個圖像“ OnBoard-1”。 當我調試添加到圖像視圖的內容時，其他圖像在那里。

我究竟做錯了什么？

。H

#import <UIKit/UIKit.h>
@interface OnBoardingView : UIView 
- (void)setImages:(NSArray *)newImages;
@end

這是.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

Answer 1

您初始化imageView與的框架scrollView ，這不是正確的是在任何情況下，可能是你的問題的原因。

順便說一句：

您的屬性處理看起來有些奇怪（為什么要合成而不是僅使用常規屬性？），為什么newImages != self.contentImages按指針比較數組（ newImages != self.contentImages ）？

Answer 2

如果要直接在分頁中顯示圖像，則可以分配頁數計數，然后將滑動手勢（左右）應用於imageview。基於左右滑動，可以更改imageview的圖像。