called

The layoutsubviews is called in the following cases:1. Init initialization does not trigger layoutsubviews.2, Addsubview will trigger layoutsubviews.3, set the frame of the view will trigger Layoutsubviews, of course, if the frame value has changed

IOS layout Mechanism -(Cgsize) sizethatfits :( cgsize) Size -(Void) sizetofit ------- -(Void) layoutsubviews -(Void) layoutifneeded -(Void) setneedslayout ------- -(Void) setneedsdisplay -(Void) drawrect Layoutsubviews will be called in

Android error MediaPlayer usage Media Player called in state * When using Media Player, let's take a look at several issues.   The usage will not be mentioned. It is best to refer to this figure of mediaPlayer when using it.   The first error is

Android error-MediaPlayer usage: Media Player called in state *, androidmediaplayer When using Media Player, let's take a look at several issues. The usage will not be mentioned. It is best to refer to this figure of mediaPlayer when using

The. NET Async Socket code is used in the project, and the following strange error occurs: CompareBaseObjectsInternal can only be called from the main thread.Constructors and field initializers will be executed from the loading thread when loading a

The construction method of the thread class, the static block is called by the thread that the new thread class is on, and the code inside the Run method is called by the thread itself.If you're confused by the above statement, let me give you an

Today, Lim's egg hurts. Some people asked in the blog message: Why their company's website was down right? 　　 I first site:www.xxx.com, domain name "www.xxx.com" in Baidu ranking is the first, then in domain:www.xxx.com, found the

since the Redis cache is updated, each service implements the update function in the basic Rediscacheupdate interface, and in the scheduled task, it uses the List The > method calls update in bulk, but there are cache dependencies between the

are you aware of thread synchronization and asynchrony? Thread synchronization: Multiple threads accessing the same resource at the same time, waiting for resource access to end, wasting time, inefficientThread Async: Implement multithreaded

Pit One:Counter Examplemyname = "global"; Global variablesfunction func () { alert (myname); "Undefined" var myname = "local"; alert (myname); "Local"}Func ();Understand:In JavaScript, you can declare multiple var statements anywhere in a

New one handler in child threads why does the following error be reported?Java.lang.RuntimeException:Can ' t create handler inside thread that have not called looper.prepare ()This is because the handler object is in the same thread as its caller,

1. Question: Curious why join? Reference: 55504161 Https://stackoverflow.com/questions/15956231/what-does-this-thread-join-code-mean Https://stackoverflow.com/questions/9366264/what-does-it-mean-to-join-a-thread

November 7 News, Baidu's founder, chairman and chief executive Robin Li in the Baidu internal online sent a "change, from you and I started" open letter circulated. Li in the mail request "encourage wolves, eliminate petty bourgeoisie", and

Stationmaster engaged in IT industry 5 years, when the so-called stationmaster three years. I have done most types of sites, including pictures, music, downloads, movies, information, friends and so on. I admit that I am not a master, so I can only

In C and C + + is different, we know that C language is more relaxed, flexible, and C + + goal is to change the C language more relaxed characteristics, the implementation of a more rigorous approach, including strict type checking and so on. In

Long time no write about weight of the topic, I have previously written a "Baidu traffic size decision Baidu weight", which directly tells us what we know and see the weight of Baidu is called the tool given, the real Baidu weight Baidu did not know

Throughout June so far, the majority of stationmaster are talking about Baidu this big area K station, according to the Baidu official saying is "for the low quality of the site measures have entered into force", but the fact is not so, or the idea

The order of the Builder calls is briefly described in chapter 4th, but that is what is said before inheritance and the problem of polymorphism are introduced. The Builder for the underlying class is definitely called in the builder of a derived

In PostgreSQL we tend to use select stored procedures in executing stored procedures, but if the stored procedure is called again, it cannot be used, and the perform stored procedure should be used to see the description of the official

In PostgreSQL we tend to use select stored procedures in executing stored procedures, but if the stored procedure is called again, it cannot be used, and the perform stored procedure should be used to see the description of the official