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the system.This time maybe you have questions again, why the implementation is-(void) Xxx_viewwillappear: (BOOL) animated{} such aThis is because SEL Swizzledselector = @selector (xxx_viewwillappear:); it's our new way of writing.Can be combined with this blog to see, map is easy to understandhttp://blog.csdn.net/yiyaaixuexi/article/details/9374411And this one is quite clear about SEL.http://blog.csdn.net/fengsh998/article/details/8612969CodeHttps://github.com/holysin/Method_swizzleMethod
In iOS runtime there is a function for exchanging method names, called Swizzle, and the following example swaps Imagewithname: With Imagenamed: Two methods to invoke the System method imagenamed: The actual call is Imagewithname:, all the picture names are stitched _os7, when the old project needs to change a set of pictures can be avoided one by one.@implementation UIImage (Extension)/** * as long as the classification is loaded into memory, it is c
What is runtime? Runtimec also known as the runtime. is the system at the time of the operation of some mechanism.is a set of underlying C language API(contains a lot of powerful practical C language data types,C language functions) The OC code that we write usually turns into the runtime code at the bottom.Such as:Xqpersion *persion = [Xqpersion alloc] init];[Persion Run];At compile time, runtime will convert the above code into:Objc_msgsend (Persion, @selector (run));What's the use of R
///////////////////////////////////////////////////////////////////////////////////////////////////#import "Nsarray+swizzle.h"@implementation Nsarray (Swizzle)-(ID) mylastobject{ID ret = [ self mylastobject]; NSLog(@ "-----mylastobject-------");return ret;}@end////////////////////////////////////////////////////////////#import "Nsarray+swizzle.h"#import Method ori = class_getinstancemethod([nsarray class], @selector( Lastobject));Method new = Class_g
Ios runtime swizzle #import @ Implementation NSObject (Extension) + (void) extends :( Class) class originSelector :( SEL) originSelector otherSelector :( SEL) otherSelector {Method othermehtodd = class_getClassMethod (class, otherSelector ); method originmehtodd = class_getClassMethod (class, originSelector); // The implementation of the two methods method_exchangeImplementations (othermehtodd, originmehtodd);} + (void) vertex :( Class) class or
exchange the IMP in 2 ways,We can use Class_replacemethod to modify the class,We can use Method_setimplementation to directly set the IMP for a method,......In the final analysis, the Imp of selector is changed, as shown:Method swizzling PracticeFor example, I'd like to hook up Nsarray's Lastobject method in just two steps.First step: Give Nsarray a lastobject of my own #import "Nsarray+swizzle.h" @implementation Nsarray (Swizzle
__nsdictionarym Attention points Swizzling should always be +load executed in the Swizzling should always be dispatch_once executed in the +loaddo not invoke when swizzling is executing in [super load] . If multiple calls [super load] , there may be "swizzle invalid" illusion, the principle is as follows: Use Method swizzling in Swift custom classesThere are two necessary conditions to use Method swizzling in a S
implementation (IMP), which is a pointer to the underlying C function.To Swizzle a method, we can map an existing selector of a method to a different implementation in the sub-publication, and associate the original implementation of the selector to a new selector.Call _cmdLet's look back at the implementation code for the new approach: 1234 - (void)xxx_viewwillappear:(BOOL)animated { [self xxx_viewwillappear:animated]; NSLog
is generated by the compiler and is automatically mapped by the runtime when the class is loaded. Method (typedef struct OBJC_METHOD *method): Represents the type of the methods in a class definition Implementation (typedef ID (*IMP) (ID, SEL, ...)) : This is a pointer type that points to where the method implementation function begins. This function uses the standard C call specification implemented for the current CPU architecture. Each parameter is a pointer to the object itself (sel
No response script warning-meaning and Solutions Firefox may bring up the following prompt: "Warning: the script does not respond", with the following content --"A script on the current page is busy or the response has stopped. You can stop the script immediately, or you can continue to wait until the script ends.This article describes the cause of this prompt, as well as possible solutions and trade-offs. This error message indicates that Firefox considers that a script is out of control during
are many viewcontrollers in the project, but there is an operation on every page. In the past, the same code was written on every page. In fact, Method Swizzling can solve this problem, for example, RDVTabBarController is only displayed on four homepages, and other pages are hidden; A: Create an extension class: UIViewController + Swizzle . H file content: #import . M file content: # Import "UIViewController + S
should save 1ms for every 1GB size heap, and remove a high-cost counting cycle, which takes up the other half of the marking phase for larger heaps. Sweeper and Scavenger: Some programs spend a lot of time on the sweeper, putting some effort into it, and there should be performance improvements. A very radical solution is to completely remove the sweeper. There
content, the content of the site want to do seconds, original content is essential. Webmaster How to create high-quality original content? The following author based on personal experience to sum up sharing: first, the false original method What is pseudo original? Not what we think of as the use of false original tools, because this kind of article is not readable, the user after referring to some even do not understand what is written. Moreover, the search engine currently works on false or
the regular expression, escape the fourth '\' as a regular '\' character in the regular expression. 1. matching judgment and searchIn Java, there are two common classes for matching and judgment operations: Java. util. RegEx. pattern, java. util. RegEx. matcher.Pattern is a compilation class of Regular Expressions in string form. A regular expression specified as a string must first be compiled as an example of it.Matcher is defined as "engine for performing matching operations on character se
at the first DWORD of the destination register, and the Y component is placed in the second DWORD (Dst_sel_y (Sq_ sel_y)), the third DWORD of the destination register is set to 0, and the fourth DWORD is set to 1 (can use 0,1 or 0.5). Directives 5 and 4 are similar, since all vertex attribute data has been exhausted, so the address that originally existed in GPR0 is no longer needed and can be overwritten. Figure 4. CF Instructions 1 and 2, which are two output instructions, the instruction
illustrate. First, depth priority all over the crawl Depth first crawl is similar to my road-sweeper station, Home > Products > Road Sweeper Series, the preferred crawl is in such a way to crawl, wait until the capture of these columns, in the grasp of the "Road Sweeper Series" column under the article, this is the depth of priority strategy, similar to fam
#import "Uitableview+swizzle.h"#import #import #import @implementation UITableView (Swizzle)Implementation: One-time set TableView location+ (void) load{Static dispatch_once_t Oncetoken;Dispatch_once (oncetoken, ^{[Self Swizzleinstancemethod: @selector (initwithframe:style:) Withnewmethod: @selector (yq_initwithframe:style:)];// Here to replace});}-(Instancetype) Yq_initwithframe: (CGRect) Frame style: (Uitableviewstyle) style{UITableView *tableview =
in UMD we do not convert the texture address, instead, the GPU transmits the specific tile mode to the GPU based on the input parameters. The GPU performs the swizzle operation on the Texture Based on the tile mode. Z order related knowledge can be seen on the wiki page http://en.wikipedia.org/wiki/Z-order_curve Texture swizzle knowledge see: http://www.cnblogs.com/mikewolf2002/archive/2012/03/11/2390097.h
protect organizations and users from this threat. Keystroke loggers are available in either software or hardware versions. They can store everything a user types without the user ever knowing they're even there.The key recorder has a software or hardware version. They can save everything you input without knowing it exists. Some of the more clever software versions can even operate without antivirus or AntiSpyware tools, such as Ad-aware or spy sweeper
to the Internet. you will also receive Norton Security Scan and clean product updatesthrough the internet. V. pandatv anti-virus software (panda cloud Antivirus) Panda Security, a famous European security company, has spent three years developing a free cloud computing-based anti-virus software panda cloudantivirus, which uses panda's cloud computing technology: Integrated Artificial Intelligence, to detect viruses, malware, rootkit, and enlightening viruses. Different from traditional anti
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