iOS QLPreviewController(Quick Look)快速浏览jpg,PDF,world等

#import <QuickLook/QuickLook.h>

@interface ViewController ()<QLPreviewControllerDataSource,QLPreviewControllerDelegate>

@property (nonatomic, strong)QLPreviewController *QLPreVC;

- (void)viewDidLoad

{

[super viewDidLoad];

_QLPreVC=[QLPreviewController new];

_QLPreVC.dataSource=self;

_QLPreVC.delegate=self;

}

//代理方法

- (NSInteger) numberOfPreviewItemsInPreviewController: (QLPreviewController *) controller

{

return 3;//显示页数

}

- (id <QLPreviewItem>)previewController: (QLPreviewController *)controller previewItemAtIndex:(NSInteger)index

{

//方法一：打开本地存储文件

NSURL *targetURL = [NSURL URLWithString:_url];

NSString *docPath = [self documentsDirectoryPath];

// Combine the filename and the path to the documents dir into the full path

NSString *pathToDownloadTo = [NSString stringWithFormat:@"%@/%@", docPath, [targetURL lastPathComponent]];

NSLog(@"-========--%@---",pathToDownloadTo);

BOOL hasPDF=NO;

NSFileManager *fileManager = [NSFileManager defaultManager];

hasPDF = [fileManager fileExistsAtPath:pathToDownloadTo];

targetURL = [NSURL fileURLWithPath:pathToDownloadTo];

//方法二：打开url链接

//     NSURL *targetURL = [NSURL URLWithString:@"file:///Users/mac/Downloads/doc-previewer/Core%20J2ME%20Technology.pdf"];

return targetURL;

}

//最后只要在触发事件里面push即可：

- (void)nextpage_showFiles {

[self.navigationController pushViewController:_QLPreVC animated:YES];

}