阿神2017-04-18 09:16:58
可以透過Group下載,利用dispath_group_enter()和dispath_group_leave()來把執行緒放進群組裡,利用dispath_group_notify來監聽任務是否下載完,不要用dispath_group_wait來監聽,因為dispath_group_wait會堵塞執行緒。
下面我寫了一個例子:
NSString *urlStr1 = @"url1";
NSString *urlStr2 = @"url2";
NSString *urlStr3 = @"url3";
NSArray *urlStrings = @[urlStr1, urlStr2, urlStr3];
dispath_group_t requestGroup = dispath_group_create();
for(NSString urlString in urlStrings) {
dispatch_group_enter(requestGroup);
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager GET:urlString parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"Success");
dispatch_group_leave(requestGroup);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Error: %@", error);
dispatch_group_leave(requestGroup);
}];
}
dispatch_group_notify(requestGroup, dispatch_get_main_queue(), ^{
//doSomething
});
全手打,希望給好評^_^
這個方法感覺有點麻煩,如果有哪位大神有更好的方法希望分享一下