[iOS]图组全屏可缩放和旋转屏幕来展示

[iOS]图组全屏可缩放和旋转屏幕来展示

Demo：http://download.csdn.net/detail/u012881779/9775105

因为要加载图片，所以先导入了工具SDWebImage；

#import "GraphicDetailsViewController.h"#import "UIImageView+WebCache.h"@interface GraphicDetailsViewController () <UIScrollViewDelegate>@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;@property (strong, nonatomic) NSArray *picArr;@property (assign,nonatomic) NSInteger pageIndex;@end@implementation GraphicDetailsViewController@synthesize dataMDict = _dataMDict;- (void)dealloc {    _dataMDict = nil;    self.picArr = nil;}- (void)viewDidLoad {    [super viewDidLoad];    self.pageIndex = [[_dataMDict objectForKey:@"index"] integerValue];    self.picArr = [_dataMDict objectForKey:@"array"];    [self settingAction:YES];    [self creatPictureAction];        // 设备旋转通知    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];    [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(handleDeviceOrientationDidChange:)                                                 name:UIDeviceOrientationDidChangeNotification                                               object:nil];}- (BOOL)prefersStatusBarHidden {    return YES ;}- (void)settingAction:(BOOL)result {    self.title = @"图片详情";        [self.navigationController setNavigationBarHidden:result];    // iOS7之后    if ([self respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)]) {        [self prefersStatusBarHidden];        [self performSelector:@selector(setNeedsStatusBarAppearanceUpdate)];    }    // iOS9之后    [[UIApplication sharedApplication] setStatusBarHidden:result];}- (IBAction)tapBackViewAction:(id)sender {    [self settingAction:NO];    [self.navigationController popViewControllerAnimated:NO];    [self.navigationController setNavigationBarHidden:NO];    [[UIApplication sharedApplication] setStatusBarHidden:NO];}- (void)creatPictureAction {    for (int i = 0; i < self.picArr.count ; i ++) {        NSString *imgUrl = [self.picArr objectAtIndex:i];        UIScrollView *backScrollView = [[UIScrollView alloc] init];        backScrollView.backgroundColor = [UIColor clearColor];        [backScrollView setShowsVerticalScrollIndicator:NO];        [backScrollView setShowsHorizontalScrollIndicator:NO];        [backScrollView.layer setMasksToBounds:YES];        backScrollView.delegate = self;        backScrollView.maximumZoomScale = 3.0;        backScrollView.minimumZoomScale = 1.0;        [_scrollView addSubview:backScrollView];        UIImageView *tempIV = [[UIImageView alloc] init];        [tempIV sd_setImageWithURL:[NSURL URLWithString:imgUrl] placeholderImage:[UIImage imageNamed:@"qspic.png"]];        [tempIV setContentMode:UIViewContentModeScaleAspectFit];        [backScrollView addSubview:tempIV];    }    [self adaptiveImageViewFrame];}#pragma mark UIScrollViewDelegate- (void)scrollViewDidScroll:(UIScrollView *)scrollView {    if (scrollView.tag == 2300) {        CGPoint osPoint = scrollView.contentOffset;        osPoint.y = 0;        scrollView.contentOffset = osPoint;    }}- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {    if (scrollView.tag == 2300) {        CGPoint osPoint = scrollView.contentOffset;        NSInteger index = (osPoint.x + [UIScreen mainScreen].bounds.size.width/2.0) / [UIScreen mainScreen].bounds.size.width;        osPoint.x = [UIScreen mainScreen].bounds.size.width * index;        [UIView animateWithDuration:0.2 animations:^{            scrollView.contentOffset = osPoint;        } completion:nil];                self.pageIndex = index;    }}// 通过ScrollView的这个代理方法来实现图片的缩放- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {    if (scrollView.tag != 2300) {        NSArray *subViews = [scrollView subviews];        UIImageView *imageView;        for (int i = 0; i < subViews.count ; i ++) {            UIView *tempView = [subViews objectAtIndex:i];            if ([[tempView class] isSubclassOfClass:[UIImageView class]]) {                imageView = (UIImageView *)tempView;            }        }        return imageView;    } else {        return nil;    }}// 监控屏幕旋转- (void)handleDeviceOrientationDidChange:(UIInterfaceOrientation)interfaceOrientation{    UIDevice *device = [UIDevice currentDevice] ;    switch (device.orientation) {        case UIDeviceOrientationFaceUp:            NSLog(@"屏幕朝上平躺");            break;        case UIDeviceOrientationFaceDown:            NSLog(@"屏幕朝下平躺");            break;        case UIDeviceOrientationUnknown:            NSLog(@"未知方向");            break;        case UIDeviceOrientationLandscapeLeft:            NSLog(@"home键在右");            break;        case UIDeviceOrientationLandscapeRight:            NSLog(@"home键在左");            break;        case UIDeviceOrientationPortrait:            NSLog(@"home键在下");            break;        case UIDeviceOrientationPortraitUpsideDown:            NSLog(@"home键在上");            break;        default:            NSLog(@"无法辨识");            break;    }        [self adaptiveImageViewFrame];}// 设置scrollView和imageView的frame- (void)adaptiveImageViewFrame {    float sWith = [UIScreen mainScreen].bounds.size.width;    float sHigh = [UIScreen mainScreen].bounds.size.height;        NSMutableArray *subSVArr = [[NSMutableArray alloc] init];    NSArray *subArr =  _scrollView.subviews;    for (int i = 0; i < subArr.count ; i ++) {        UIView *tempView = [subArr objectAtIndex:i];        if ([[tempView class] isSubclassOfClass:[UIScrollView class]]) {            [subSVArr addObject:tempView];        }    }    for (int i = 0; i < subSVArr.count ; i ++) {        UIScrollView *tempView = [subSVArr objectAtIndex:i];        [tempView setFrame:CGRectMake(sWith*i, 0, sWith, sHigh)];        [[[tempView subviews] firstObject] setFrame:tempView.bounds];    }        [_scrollView setContentSize:CGSizeMake(sWith*subSVArr.count, sHigh)];    NSInteger index = self.pageIndex;    CGPoint osPoint = _scrollView.contentOffset;    osPoint.y = 0;    osPoint.x = sWith * index;    _scrollView.contentOffset = osPoint;}@end

示意图：