Objective-C

1#pragmaMark-----------How arrays are initialized--------------2//Insert code here ...3//NSLog (@ "Hello, world!");4//How arrays are initialized5//1. Initializing an empty array6//Nsarray *array = [[Nsarray alloc] init];//immutable arrays, which

Objective-c Kit Kat Kinky Tech –delegate HookArtifice refers to a skill and a product that is too kit and useless.Requirements DescriptionIn the actual programming process, we always have to customize some of the controls, in the process of

%@ Object%d,%i integer%li Long Integral type%u unsigned shaping%f floating point/double word%x,%x binary integer%o Eight-binary integers%zu size_t%p pointer%e floating point/double word (scientific calculation) (double)%g floating point/double word (

The way in which strings are reversed in OC can be handled in two ways:The first one: remove each character from the string from beginning to end, then add it from the tail to the variable string, and then output it.The second is to convert a string

1. Initialization method:#import @interface person:nsobject{NSString *_name;Nsinteger _age;}Custom initialization method, must start with Init-(ID) initwithname: (nsstring *) name withage: (Nsinteger) age; Printing information-(void) showinfo;

Nsrange (location length)"I Love OC"Nsrange r = Nsmakerange (2,4)NSString *str = @ "I love You";Nsrange range = [str rangeofstring:@ "Love"];NSLog (@ "loc =%ld, length =%ld", range.location, Range.length);Cannot find length = 0,location = Nsnotfound

In general, iOS has a partial page load process, creating a model then associating the nib file with the model and then quickly getting to the control instance on the nib file. The Action Generation page. But the original content is not directly

Fourth Chapter Successioninherited syntax format: @interface circle:nsobject. The mark behind the colon runes the class that needs to be inherited. Multiple inheritance is not supported in OC. The first program with an inheritance@interface

Shallow copyA shallow copy is a copy of the memory address, so that the target object pointer and source object point to the same piece of memory space. Such as:char* str = (char*) malloc (+); char* str2 = str;A shallow copy is simply a simple copy

? The instance variable is available in degrees. Visibility of features Public (Common) Instance variables can be manipulated outside and inside the class Protected (protected, default)

Today we are going to talk about the compound , of course, not a small couple arguing to break up, and then together in the compound.　　A composite follows a synthetic reuse principle , also known as a combination or aggregation multiplexing

//Main.mFilesearchtest//Created by Zhang Leonardo on 11-10-31.Copyright (c) 2011 __mycompanyname__. All rights reserved.to discuss Via:www.renren.com/leonardozhang//#import int main (int argc, const char * argv[]){@autoreleasepool {Nsfilemanager

The class purpose definition is similar to the definition of a class:1. Statement@interface NSString (Csayhi) NSString is the target class; Csayhi is the name of the class, and there is no following: NSObject2. Realize@implementation NSString

Shallow copy: Copies only pointers to objects, not the reference object itself. Counter +1, like retain, for example.Deep copy: Copies the reference object itself. The counter does not change, resulting in a new objectRetain: Always shallow copy.

Nonatomic: Non-atomic access, non-synchronous, multi-threaded concurrent access improves performance. If this attribute is not added, the default is two access methods are atomic transaction access.(Atomic is a thread-protection technique used by

ArticleDirectory 4. Inheritance 4. Inheritance This series of lectures has a strong correlation. If you are reading this article for the first time and want to better understand the content of this chapter, I suggest you read it from

When programming with object-oriented languages such as OC, "object" is a "Basic constructor" (Building Block). developers can store and transmit data through objects. The process of passing data between objects and executing tasks is called

* ** Next to "C # my sister and Aunt Objective-C" (02), this is a Class-aunt's dog *** C # my sister: Wow, the road is narrow, isn't this an Objective-C aunt's dog? Dog: Who is it .. C # sister: Not convinced ~ Let's get you another toast .. #

Aunt Objective-C:C # Hello, little sister! # Import int main (int argc, const char * argv []) {NSLog (@ "C # Hello, little sister! "); Return 0 ;} C # sister:Aunt Objective-C! Using System; namespace CSharpToObjectiveC {class Program {static void

C # sister:Memory cleanup is just as troublesome as demolition in life. Aunt Objective-C:Yes, the split is not split, it occupies space, it should not be split, the program crashes C # sister:To put it bluntly, the difficulty is not solved. In terms