Objective-C

1. Basic use of strings (nsstring,nsmutablestring) string initialization common basic methods: NSString *str = @ "Jacky"; A temporary string NSString *STR2 = [[NSString alloc] initwithformat:@ "%@,20 years", str]; Initialize method

Nsattributedstring+heightGet attributedstring ' s height UIView+tyalertviewPowerful, easy-to-use Alert view or popup view with Controller and window, support Blur effects,custom view and animation Uiimageview+rotateUiimageview Rotation

Nsarray, Nsdictionary is not available to store the basic data types in C language. NSNumber can wrap a basic data type into an object, which indirectly saves the base data type into a collection class such as Nsarray, Nsdictionary, and so on. Use

[SuperInit] may have three of the results:The first type: [SuperINIT] Initialized successfully, this is the most normal situation. The second type: [SuperINIT] Initialization failed, we all know that OC's two-step creation, alloc open up memory

The so-called compound, is the definition of the members of this class is another class of instance methods.That is, the other objects as part of their own, to enhance their own functions,is equivalent to a function nesting in the C language. Here

Description: This objective-c topic is the prelude to learning iOS development. Also in order to have the object-oriented language development experience of the program ape, can be high-speed objective-c. If you do not have programming experience,

Classification:The main is to add some methods to the original class; You cannot add member variablesPerson (person+eat)Informal agreements:The informal agreement is the category, that is, the category that is added to the class in the framework of

Reference counterEach OC object has a reference counter that occupies 4 bytes of storage spaceWhen you use or create an object, the reference counter for the new object defaults to 1Retain: Can make reference counter +1Release: Can be a reference

Stepping Uistepper, sliding block UISlider: When they are triggered as events, their values change. Because of this, when the event is triggered, you can flip through a picture,,,Stepping Uistepper:@property (nonatomic) double minimumvalue; Default 0

This article will not be regularly updated, reproduced please indicate the source http://blog.csdn.net/uxyheaven/article/details/47780957Optimization of conditional statements in Objective-cAsk to judge a nsarray to have value, rigorous wording is

Sliding deletion is already supported in the current iOS version, but it is complicated to say that there are multiple features after sliding, not deleting the function, then you have to write it yourself, I'm right ...In fact, on the slide to

I. The internal implementation principle of attributesAssign property Internal implementationSetter Method:// setter方法@property (nonatomicassignNSString *name;- (void)setName:(NSString *)name{ _name = name;}Getter Method:// getter方法- (NSString

Special attention:Do not use both%@ and self in the description method, use both%@ and self to represent the description method to invoke self, and eventually cause the program to go into a dead loop and call the description method in a loop1.NSLog

1. Apple Recommended method Locate target and change its other Linker Flags to:-all_load or-force_load-force_load, followed by a file location, allows you to load the required files more precisely. To put it simply, the dynamic nature of

Memory management arc and auto-release Pool A variable ownership modifier in ArcVariable modifiers, which are used primarily to identify the life cycle of an object. These concepts are not available in manual memory management methods.There are

Each instance variable defines two methods: Set the setter method of the variable to get the getter method of the variable valueWriting specification for Set method The Set method must be an object method The Set method must not have a

1. OC There are several ways to create a string object? For example: How to create a String object: @ "Baby".There are 3 ways to create a string object in OC:Example: In the main.m file:　　Console output:　　2. How do I get the length of a string in OC?

We want to use a small example of a simple, popular understanding of what is the message forwarding and how to forward the message, I hope that after reading this article, we will thoroughly understand OC news.First, you need to know these two

Before we talk about Builder Pattern, let's take a look at a scene. Let's say we want to book an IPhone 6, 64G, gold, in code, probably. 1234

Overview The basis of the compaction of My Learning iOS development in the basic grammar of the knowledge of the summary series, not to be inquisitive, only practical. The content of this paper is to be used frequently in the development process of