小编OOk*_*han的帖子

我想滚动我的UIScrollView(水平).但是当按下按钮时,它会进入滚动视图的最左侧.我想滚动它3,4像素,当我再次按它时滚动另一个3,4像素

- (IBAction)leftScroll:(id)sender
{
    CGPoint pt;
    pt.x = 1;
    pt.y = 0;
    UIScrollView *sv = (UIScrollView *)[self.view viewWithTag:5];
    [sv setContentOffset:pt animated:YES];         
}

提前感谢您的回答

使用CocaPods添加Alamofire后编译应用程序时，出现以下错误。

error: SWIFT_VERSION '5.0' is unsupported, supported versions are: 3.0, 4.0, 4.2. (in target 'Alamofire')

Podfile： pod 'Alamofire', '~> 5.0.0-beta.5'

我正在跟踪将Alamofire添加到我的项目的链接Swift 5

Xcode Version: 10.1

我收到此错误:

fatal error LNK1169: one or more multiply defined symbols found

以下是包含代码的两个文件.在文件1中,我有main()函数,我正在调用在名为的第二个文件中写入的函数linklist.cpp.感谢您提前帮助.

文件1 - main.cpp

#include "stdafx.h"
# include "linklist.cpp"


int main(int argc, _TCHAR* argv[])
{
    node *link_list2;
    link_list2 = createList(31);
    addFront(link_list2,33);
    printList(link_list2);
    printf("Hello There Omer Obaid khan\n");
    return 0;
}

文件2 - linklist.cpp

# include "stdafx.h"
# include <stdlib.h>
struct node{
    node * next;
    int nodeValue;

};

node* initNode(int number);
node* createList (int value);
void addFront (node *head, int num );
void deleteFront(node*num);
void destroyList(node …

我在我的代码中收到这些错误.我确信这些只是因为一些错误,但我无法找到它.请帮我!

2010\projects\firstnamelastname\firstnamelastname\testing.cpp(15): error C2065: 'node' : undeclared identifier
1>c:\users\omer\documents\visual studio 2010\projects\firstnamelastname\firstnamelastname\testing.cpp(15): error C2065: 'linked_list2' : undeclared identifier
1>c:\users\omer\documents\visual studio 2010\projects\firstnamelastname\firstnamelastname\testing.cpp(26): error C2065: 'linked_list2' : undeclared identifier
1>c:\users\omer\documents\visual studio 2010\projects\firstnamelastname\firstnamelastname\testing.cpp(29): error C2065: 'linked_list2' : undeclared identifier
1>c:\users\omer\documents\visual studio 2010\projects\firstnamelastname\firstnamelastname\testing.cpp(29): error C3861: 'createQueue': identifier not found
1>c:\users\omer\documents\visual studio 2010\projects\firstnamelastname\firstnamelastname\testing.cpp(35): error C2065: 'linked_list2' : undeclared identifier
1>c:\users\omer\documents\visual studio 2010\projects\firstnamelastname\firstnamelastname\testing.cpp(38): error C2065: 'linked_list2' : undeclared identifier
1>c:\users\omer\documents\visual studio 2010\projects\firstnamelastname\firstnamelastname\testing.cpp(38): error C3861: 'addFront': identifier not found
1>c:\users\omer\documents\visual studio 2010\projects\firstnamelastname\firstnamelastname\testing.cpp(45): error C2065: 'linked_list2' : undeclared identifier …