NSOperation 抽象的基类
1、子类：
NSInvocationOperation & NSBlockOperation
NSOperationQueue 队列 在多线程中相当于线程池
addOperation
setMaxConcurrentOperation
状态
ready cancelled（异步的操作cancelled之后还会执行完然后再进行状态判断）executing finished asynchronous
依赖（b要在a执行完之后才能执行的需求）
addDependency
-------------------------------
同步：
NSBlockOperation *blockOperation = [NSBlockOperation blockOperationWithBlock:^{
for(int i=0； i<3；i++){
[NSThread sleepForTimeInterval:1];
}
}];
[blockOperation start];
异步：
NSBlockOperation *blockOperation = [NSBlockOperation blockOperationWithBlock:^{
for(int i=0； i<3；i++){
[NSThread sleepForTimeInterval:1];
}
}];
if(self.operationQueue){
self.operationQueue = [[NSOperationQueue alloc] init];
}
[self.operationQueue addOperationQueue:blockOperatin];//(实现一异步)
[A addDependency:B];
[B addDependency:C];
[C addDependency:D];
切记不要形成闭环 否则会死锁
+ (void)uploadImages:(NSArray<UIImage *> *)images isAsync:(BOOL)isAsync complete:(void(^)(NSArray<NSString *> *names, UploadImageState state))complete
{
id<OSSCredentialProvider> credential = [[OSSPlainTextAKSKPairCredentialProvider alloc] initWithPlainTextAccessKey:AccessKeysecretKey:SecretKey];
OSSClient *client = [[OSSClient alloc] initWithEndpoint:AliYunHost credentialProvider:credential];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
queue.maxConcurrentOperationCount = images.count;
NSMutableArray *callBackNames = [NSMutableArray array];
int i = 0;
for (UIImage *image in images) {
if (image) {
NSBlockOperation *operation = [NSBlockOperation blockOperationWithBlock:^{
//任务执行
OSSPutObjectRequest * put = [OSSPutObjectRequest new];
put.bucketName = BucketName;
NSString *imageName = [kTempFolder stringByAppendingPathComponent:[[NSUUID UUID].UUIDString stringByAppendingString:@".jpg"]];
put.objectKey = imageName;
[callBackNames addObject:imageName];
NSData *data = UIImageJPEGRepresentation(image, 0.3);
put.uploadingData = data;
OSSTask * putTask = [client putObject:put];
[putTask waitUntilFinished]; // 阻塞直到上传完成
if (!putTask.error) {
NSLog(@"upload object success!");
} else {
NSLog(@"upload object failed, error: %@" , putTask.error);
}
if (isAsync) {
if (image == images.lastObject) {
NSLog(@"upload object finished!");
if (complete) {
complete([NSArray arrayWithArray:callBackNames] ,UploadImageSuccess);
}
}
}
}];
if (queue.operations.count != 0) {
[operation addDependency:queue.operations.lastObject];
}
[queue addOperation:operation];
}
i++;
}
if (!isAsync) {
[queue waitUntilAllOperationsAreFinished];
NSLog(@"haha");
if (complete) {
if (complete) {
complete([NSArray arrayWithArray:callBackNames], UploadImageSuccess);
}
}
}
}