IOS development-Stage 4-memory management, ios Stage 4

IOS development-Stage 4-memory management, ios Stage 4 Deep copy and light copy   Only objects that implement the NSCoping protocol can be copied. The NSCopy Protocol is required for copying custom objects. Whether it is a deep copy or a shallow

) Basic usage of UIALertView and how to handle the event in the dialog box by using UIAlertViewDelegate.

(Conversion) basic usage of UIALertView and how to handle the event of the dialog box by UIAlertViewDelegate, uialertviewdelegate First, the View Controller must implement the method in the Protocol UIAlertViewDelegate and specify the delegate as

IOS MVC design mode and iosmvc Design Mode

IOS MVC design mode and iosmvc Design Mode Notes for using property: Copy: NSString Strong: general object Weak: UI control Assign: Basic Data Type PS: the first is the most basic model, which will be improved later. Reasons for replacing the

IOS-Core Graphic drawing

IOS-Core Graphic drawing * Redefine the UIView and draw it in drawRect :( CGRect) rect; 1. Draw a path     _context=UIGraphicsGetCurrentContext(); CGMutablePathRef path=CGPathCreateMutable(); CGPathMoveToPoint(path, NULL, 50, 50);

[IOS] a line of code adds an index to a Chinese Array

[IOS] a line of code adds an index to a Chinese Array /*** Return the original data and the empty array that stores the index to return the sorted array * used classification encapsulation, directly introduce the header file to use the method **

IOS capture program crash log, ios capture crash log

IOS capture program crash log, ios capture crash log It is normal to encounter a program crash during iOS development. How can I capture the exception information and notify developers when the program crashes? The following describes how to

IOS: before the date is converted to xx

IOS: before the date is converted to xx // Before converting a date to xx @ interface NSString (date) + (NSString *) dateString :( NSString *) dateStr; @ end @ implementation NSString (date) + (NSString *) dateString :( NSString *) dateStr {NSDate *

Install Eclipse on mac system, write java program, maceclipse

Install Eclipse on mac system, write java program, maceclipse Step 1: install java jre (java Runtime Environment ). : Log on to the Oralce official website and click the Download option. The page is displayed: Select Java Runtime Environment

) IOS study notes how to obtain the system information of the IOS program

(GO) IOS study notes how to obtain the system information of the IOS program Home> program development> mobile development> IOS> body iOS: gets the phone model, system version, software name, software version-Comments: vipa1888 favorites I want to

IOS network communication-monitoring network status: Reachability (Accessibility) and iosreachability

IOS network communication-monitoring network status: Reachability (Accessibility) and iosreachability 1. the iOS platform is designed based on the concept of network connection. With this feature, developers have created many excellent third-party

IOS Study Notes 2015-03-24 OC-API-Immutable string, 2015-03-24oc-api-

IOS Study Notes 2015-03-24 OC-API-Immutable string, 2015-03-24oc-api- Mostly imitation//// Main. m // OC-API-Immutable string /// Created by wangtouwang on 15/3/25. // Copyright (c) 2015 wangtouwang. all rights reserved. // # import // initialize

IOS local data storage (1)

IOS local data storage (1)   UserDefaults for local data storage   The basic data types supported by UserDefaults include: NSData,NSString,NSNumber,NSDate,NSArray, OrNSDictionary   If you store a custom class directly, the following error

Collection of NSLog output formats and nslog output formats

Collection of NSLog output formats and nslog output formats • % @ Object • % D, % I integer • % U unsigned integer • % F floating point/double-Character • % X, % X binary integer • % O octal integer • % Zu size_t • % P pointer • % E

IOS-move gesture to add

IOS-move gesture to addIOS-sliding gesture Add 1. Create a Single View Application project, select next, and name the project swipeGestureTest    2. Modify the ViewController class file (1) in the ViewController. h file, add Properties   @

Enter 6 digits in the ios input box

Enter 6 digits in the ios input box -(BOOL) textField :( UITextField *) textField shouldChangeCharactersInRange :( nsange) range replacementString :( NSString *) string {if (textField. tag = 11) {// new password if (range. location 0) {unichar

Obtain the first and last days of the current year, month, and week.

Obtain the first and last days of the current year, month, and week. Let's talk about the code. //// EBDate. h // ChargeMoney /// Created by eagle on 15-3-24. // Copyright (c) 2015 EagleB. all rights reserved. // # import @ interface EBDate:

C Language -- pointer, pointer

C Language -- pointer, pointer 1. What is a pointer? "Pointer variable" refers to the variable used to store the variable address. A pointer variable is also a variable. The difference between it and other variables is that it stores

Ios development-KVO analysis, ios-kvo Analysis

Ios development-KVO analysis, ios-kvo Analysis Target: Listen to what is added to the NSMutableArray object   The Code is as follows:C code -(Void) viewDidLoad { [Super viewDidLoad]; Self. dataArray = [NSMutableArray arrayWithObject: @ "1"]; [Self

In Object-C, NSData is converted to NSString, Byte, UIImage, and nsdatansstring.

Convert NSData to NSString, Byte, UIImage, and nsdatansstring in Object-C 1. NSData and NSString NSData --> NSString * aString = [[NSString alloc] initWithData: adata encoding: NSUTF8StringEncoding]; NSString --> NSData NSString * aString = @ "1234 "

Ios multi-thread operations-GCD latency operations and one-time code

Ios multi-thread operations-GCD latency operations and one-time codeYou can use the GCD function to perform latency operations. This function is dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC)),

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