首先第一步开启iCloud服务：
image.png
然后就是看代码了。
先定义一个继承UIDocument的，
它用来存储文件的Data.其内部响应外部调用。先看UIDocument的接口，
#pragma mark *** Simple Reading and Writing ***
// These methods will be all most apps need to access files. Applications with complex reading and writing needs should see the Advanced Reading and Writing section below.
// Typical subclasses will implement this method to do reading. UIKit will pass NSData typed contents for flat files and NSFileWrapper typed contents for file packages.
// typeName is the UTI of the loaded file.
- (BOOL)loadFromContents:(id)contents ofType:(nullable NSString *)typeName error:(NSError **)outError API_UNAVAILABLE(tvos);
// Typical subclasses will implement this method and return an NSFileWrapper or NSData encapsulating a snapshot of their data to be written to disk during saving.
// Subclasses that return something other than a valid NSFileWrapper or NSData instance, or don't override this method must override one of the writing methods in the Advanced Saving section to write data to disk.
- (nullable id)contentsForType:(NSString *)typeName error:(NSError **)outError API_UNAVAILABLE(tvos);
再看看MyDocument的代码。
#import <UIKit/UIKit.h>
@interface MyDocument : UIDocument
@property(strong,nonatomic)NSData * myData;
@end
@implementation MyDocument
//读取icloud数据调用，响应openWithCompletionHandler
- (BOOL)loadFromContents:(id)contents ofType:(nullable NSString *)typeName error:(NSError **)outError __TVOS_PROHIBITED
{
self.myData = [contents copy];
return true;
}
//保存数据、修改数据到icloud，响应save
- (nullable id)contentsForType:(NSString *)typeName error:(NSError **)outError __TVOS_PROHIBITED
{
if (!self.myData) {
self.myData = [[NSData alloc] init];
}
return self.myData;
}
@end
怎么使用，
#import "MyDocument.h"
#define UbiquityContainerIdentifier @"iCloud.com.qzzn.damon.iosIcloudDemoa"
@interface ViewController ()<UIDocumentPickerDelegate>
@property(strong,nonatomic) NSUbiquitousKeyValueStore *myKeyValue; //字符串使用
@property(strong,nonatomic) MyDocument *myDocument; //icloud数据处理
@property(strong,nonatomic) NSMetadataQuery *myMetadataQuery;//icloud查询需要用这个类
@property(strong,nonatomic) NSURL *myUrl;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(10, 100, 100, 30)];
[button setTitle:@"保存字符串" forState:UIControlStateNormal];
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button addTarget:self action:@selector(saveString) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
UIButton *button2 = [[UIButton alloc] initWithFrame:CGRectMake(10, 200, 100, 30)];
[button2 setTitle:@"读取字符串" forState:UIControlStateNormal];
[button2 setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button2 addTarget:self action:@selector(loadString) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button2];
UIButton *button3 = [[UIButton alloc] initWithFrame:CGRectMake(10, 300, 100, 30)];
[button3 setTitle:@"上传资料" forState:UIControlStateNormal];
[button3 setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button3 addTarget:self action:@selector(uploadDoc) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button3];
UIButton *button5 = [[UIButton alloc] initWithFrame:CGRectMake(10, 400, 100, 30)];
[button5 setTitle:@"修改资料" forState:UIControlStateNormal];
[button5 setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button5 addTarget:self action:@selector(editDoc) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button5];
UIButton *button4 = [[UIButton alloc] initWithFrame:CGRectMake(10, 500, 200, 30)];
[button4 setTitle:@"获取最新数据" forState:UIControlStateNormal];
[button4 setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button4 addTarget:self action:@selector(downloadDoc) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button4];
UIButton *button6 = [[UIButton alloc] initWithFrame:CGRectMake(10, 600, 100, 30)];
[button6 setTitle:@"删除资料" forState:UIControlStateNormal];
[button6 setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button6 addTarget:self action:@selector(removeDoc) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button6];
self.myKeyValue = [NSUbiquitousKeyValueStore defaultStore];
//字符串
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(StringChange:) name:NSUbiquitousKeyValueStoreDidChangeExternallyNotification object:self.myKeyValue];
//文档
//数据获取完成
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(MetadataQueryDidFinishGathering:) name:NSMetadataQueryDidFinishGatheringNotification object:self.myMetadataQuery];
//数据更新通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(MetadataQueryDidUpdate:) name:NSMetadataQueryDidUpdateNotification object:self.myMetadataQuery];
//文档
self.myMetadataQuery = [[NSMetadataQuery alloc] init];
}
-(void)StringChange:(NSNotification*)noti
{
NSLog(@"%@",noti.object);
}
-(void)saveString{
NSLog(@"savestring");
static int i = 0;
i++;
if (i==1) {
[self.myKeyValue setObject:@"damon" forKey:@"name"];
}
else if (i==2){
[self.myKeyValue setObject:@"dong" forKey:@"name"];
i=0;
}
[self.myKeyValue synchronize];
}
-(void)loadString{
NSLog(@"loadstring");
NSLog(@"name:%@",[self.myKeyValue objectForKey:@"name"]);
}
//创建文档并上传
-(void)uploadDoc{
NSLog(@"uploadDoc");
//文档名字
NSString *fileName =@"atest.txt";
fileName = @"OpenGL ES 2.0 编程指南 中文版@www.java1234.com.pdf";
NSURL *url = [self getUbiquityContainerUrl:fileName];
if (!url) {
return;
}
NSLog(@"%@",url);
NSURL * oldurl = [NSURL fileURLWithPath:[[NSBundle mainBundle]pathForResource:@"OpenGL ES 2.0 编程指南 中文版@www.java1234.com" ofType:@"pdf"]];
MyDocument *doc = [[MyDocument alloc] initWithFileURL:oldurl];
//文档内容
// NSString*str = @"测试文本数据";
// doc.myData = [str dataUsingEncoding:NSUTF8StringEncoding];
[doc saveToURL:url forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL success) {
if (success) {
NSLog(@"创建成功");
}
else{
NSLog(@"创建失败");
}
}];
}
//保存文档，只是save参数不一样用UIDocumentSaveForOverwriting
-(void)editDoc{
NSLog(@"editDoc");
//文档名字
NSString *fileName =@"test.txt";
NSURL *url = [self getUbiquityContainerUrl:fileName];
MyDocument *doc = [[MyDocument alloc] initWithFileURL:url];
//文档内容
NSString*str = @"修改了数据";
doc.myData = [str dataUsingEncoding:NSUTF8StringEncoding];
[doc saveToURL:url forSaveOperation:UIDocumentSaveForOverwriting completionHandler:^(BOOL success) {
if (success) {
NSLog(@"修改成功");
}
else{
NSLog(@"修改失败");
}
}];
}
//移除文档
-(void)removeDoc{
NSLog(@"removeDoc");
NSString *fileName =@"test.txt";
NSURL *url = [self getUbiquityContainerUrl:fileName];
NSError* error;
[[NSFileManager defaultManager] removeItemAtURL:url error:&error];
if (error) {
NSLog(@"%@",error.localizedDescription);
}else{
NSLog(@"remove success");
}
}
//获取最新数据
-(void)downloadDoc{
NSLog(@"downloaddoc");
//设置搜索文档
[self.myMetadataQuery setSearchScopes:@[NSMetadataQueryUbiquitousDocumentsScope]];
[self.myMetadataQuery startQuery];
[self importDocumentFromiCloud];
}
//获取成功
-(void)MetadataQueryDidFinishGathering:(NSNotification*)noti{
NSLog(@"MetadataQueryDidFinishGathering");
NSArray *items = self.myMetadataQuery.results;//查询结果集
//便利结果
[items enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSMetadataItem*item =obj;
//获取文件名
NSString *fileName = [item valueForAttribute:NSMetadataItemFSNameKey];
//获取文件创建日期
NSDate *date = [item valueForAttribute:NSMetadataItemFSContentChangeDateKey];
NSLog(@"%@,%@",fileName,date);
//file:///private/var/mobile/Containers/Shared/AppGroup/AA2BACA6-84BC-4918-8499-AD6BD445EDF6/File%20Provider%20Storage/%E7%83%AD%E8%85%BE%E8%85%BE.pdf
//读取文件内容
MyDocument *doc =[[MyDocument alloc] initWithFileURL:[self getUbiquityContainerUrl:fileName]];
[doc openWithCompletionHandler:^(BOOL success) {
if (success) {
NSLog(@"读取数据成功.");
NSString *dataText = [[NSString alloc] initWithData:doc.myData encoding:NSUTF8StringEncoding];
NSLog(@"数据:%@",dataText);
}else{
}
}];
}];
}
//数据有更新
-(void)MetadataQueryDidUpdate:(NSNotification*)noti{
NSLog(@"icloud数据有更新");
}
//获取url
-(NSURL*)getUbiquityContainerUrl:(NSString*)fileName{
if (!self.myUrl) {
self.myUrl = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:UbiquityContainerIdentifier];//URLForUbiquityContainerIdentifier
if (!self.myUrl) {
NSLog(@"未开启iCloud功能");
return nil;
}
}
NSLog(@"myUrl:%@",self.myUrl);
NSURL *url = [self.myUrl URLByAppendingPathComponent:@"Documents"];
url = [url URLByAppendingPathComponent:fileName];
NSLog(@"url= %@",url);
return url;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(void)importDocumentFromiCloud{
// - (void)presentDocumentPicker {
NSArray *documentTypes = @[@"public.content", @"public.text", @"public.source-code ", @"public.image", @"public.audiovisual-content", @"com.adobe.pdf", @"com.apple.keynote.key", @"com.microsoft.word.doc", @"com.microsoft.excel.xls", @"com.microsoft.powerpoint.ppt"];
UIDocumentPickerViewController *documentPickerViewController = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:documentTypes inMode:UIDocumentPickerModeOpen];
documentPickerViewController.delegate = self;
[self presentViewController:documentPickerViewController animated:YES completion:nil];
// }
}
#pragma mark - UIDocumentPickerDelegate
- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentAtURL:(NSURL *)url {
NSArray *array = [[url absoluteString] componentsSeparatedByString:@"/"];
NSString *fileName = [array lastObject];
fileName = [fileName stringByRemovingPercentEncoding];
NSLog(@"url,fileName:::%@/%@",url,fileName);
MyDocument *iCloudDoc = [[MyDocument alloc]initWithFileURL:url];
[iCloudDoc openWithCompletionHandler:^(BOOL success) {
if (success) {
[iCloudDoc closeWithCompletionHandler:^(BOOL success) {
NSLog(@"关闭成功");
}];
NSString *content = [[NSString alloc]initWithData:iCloudDoc.myData encoding:NSUTF8StringEncoding];// iCloudDoc.myData
NSLog(@"%@",content);
}
}];
}
@end
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