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Tag: method

iPhone – Why do I need to use the original accessor method in the core data item?

Why do I need to use raw accessor methods in Core Data projects?

I am reading about core data, please note the following:

By default, Core Data dynamically
creates efficient public and

September 23, 2021By Simo iPhone Access, Core, data items, iPhone, mesh, method, needs, original, use, whyLeave a Comment

iPhone – UisearchDisplayController – Click on the overlay, method call?

Is there a delegate method that will be called when the user clicks on the dark overlay, which will basically remove the first responder status from the UISearchDisplayController? (I can’t find one

September 23, 2021By Simo iPhone call, click, iPhone, method, superposition, UisearchDisplayControllerLeave a Comment

Mac system modify environment variable method

The environment variables of the Mac system, the loading order is:
/etc/profile /etc/paths ~/.bash_profile ~/.bash_login ~/.profile ~/.bashrc

/etc/profile and /etc/paths are system-level, th

September 23, 2021By Simo Macbook environment, Mac, method, modification, system, variableLeave a Comment

iPhone – Add multiple buttons to the view to the view, call the same method, determine which button it is

I want to programmatically add multiple UIButtons to the view-unknown number of buttons at compile time.

I can make one or more like this UIButton (in a loop, but shortened for simplicity):

September 23, 2021By Simo iPhone Add, buttons, call, determination, iPhone, method, multiple, programming, the same, view, way, whichLeave a Comment

Does MacOS – Does Mac OS have a way to create an anonymous file mapping?

In the UNIX world, the standard way to create a file mapping object supported by RAM or page files instead of disk files is to call shm_open. This will create a memory map with a name, and Return a

September 23, 2021By Simo Macbook Anonymous, create, file, Mac, MacOS, Mapping, method, OS, whetherLeave a Comment

iPhone – Why is it in .m declared some methods instead .h?

I am using Xcode’s navigation-based application to create a new file, and I see that the .m file contains the following lines:

@interface RootViewController ()
– (void)configureCell:(UITableV

September 23, 2021By Simo iPhone certain, iPhone, method, not, statement, whyLeave a Comment

PowerDesigner16 Configuration Display Comment Comment Configuration Method

No matter 15 or 16. There is no configuration of displaying attribute field comments directly in the view, so the comments need to be displayed in an indirect way. The operation flowchart is as fol

September 22, 2021By Simo Power Designer Comment, configuration, method, Note, PowerDesigner, PowerDesigner16, ShowLeave a Comment

PowerDesigner generates data structural diagrams and corresponding SQL export methods

1. Download powerDesigner

The link address is http://soft.onlinedown.net/soft/577763.htm

2. Open the software, file -> new project, create a new project; then create a new entity to bui

September 22, 2021By Simo Power Designer and corresponding, data, export, generated, method, PowerDesigner, SQL, structural diagramLeave a Comment

PowerDesigner16 does not show a comment comment _ solving configuration method

No matter 15 or 16. There is no configuration of displaying attribute field comments directly in the view, so the comments need to be displayed in an indirect way. The flow chart of the operation i

September 22, 2021By Simo Power Designer Comment, configuration, method, Note, PowerDesigner, PowerDesigner16, Show, solutionLeave a Comment

PostgreSQL – the best way to make a large number of updates to the index set

The context of this question is PostgreSQL 9.6.5 on AWS RDS.

The question is about a table containing 300 million rows of the following logical data model Best mode design and batch update st

September 21, 2021By Simo Postgresql bit, index, large quantity, method, optimal, pair, percent, PostgreSQL, set, UpdateLeave a Comment

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