IOS

Warning: Attempt to present on whose view is not in the window hierarchy !, Attempthierarchy When I want to jump from one VC to another -(Void) presentViewController :( UIViewController *) viewControllerToPresent animated: (BOOL) flag completion :(

GET and POST requests in iOS development practices GET and POST requests are the most common HTTP requests. Familiarize yourself with the HTTP communication process before talking about the request method: Request 1. Request Line: Request Method,

IOS development practices-XML For the comparison between xml and json, we have provided a reference in the previous article. The syntax structure of xml is not described here. Go straight to the xml Parsing Method in iOS. XML parsing (Dom and SAX)

Introduction to multithreading and Multithreading The purpose of this blog is to share with you some simple understanding of multithreading and sort out your own knowledge. If anything is inappropriate, you are welcome to correct it.   First, we

IOS certificate Bug and ios certificate bug Symptom: The identity used to sign the executable is no longer valid Please verify that your device's clock is properly set, and that your signing certificate is not expired. Your signing certificate

Code note: the animation is flipped when you click cell, and the cell animation is flipped. I ,. 2. Engineering Drawing. 3. Code. RootViewController. h #import @interface RootViewController : UIViewController{ UITableView

Ios ColorLUT filter and ioscolorlut Filter Filter Using this square image Code: "CIFilter + ColorLUT. h" "CIFilter + ColorLUT. m"   # Import "CIFilter + ColorLUT. h" # Import # Import @ Implementation CIFilter (ColorLUT) + (CIFilter *)

Core Data sorting (1): coredata sortingSorting Core Data (1) In Xcode7.2, only the Use Core Data option can be selected in Mast-Debug and Single View.If you select Use Core Data, Xcode will automatically generate the Core code of Core Data in

IOS notes on image-to-pixel Conversion No matter how the image is generated, it is read from the disk, obtained from other objects, or obtained from the current video memory. Whether it is a similar image, UIImage or CGImage. The Display

Common shortcuts in Xcode and common shortcuts in Xcode Create a project com + shift + N Create File com + N Preference settings for general com +, Jump to the specified row com + L   The current row adds a breakpoint com ++ \ Com + at the top of

Common attributes of ios text and ios text1. text: Set the label to display text. 2. attributedText: Set the label attribute text. NSString *text = @"first"; NSMutableAttributedString *textLabelStr = [[NSMutableAttributedString alloc]

Ios calculates the UILabel height based on the number of characters, iosuilabel In the past, many methods for implementing this function were encapsulated to achieve the effect, but the code and Implementation ideas were much more complicated and

Pull up, pull down UITableView, interactive mode pop-up (Custom Animation), uitableview Mode   Part of the Code InteractiveTransition class inherits NSObject: - (instancetype)initWithPresentingController:(UITableViewController *)presentingVc

[IOS development] UIWebView and JavaScript (JS) callback interaction, iosuiwebview----------------------------------------------- Many articles about the interaction between objc and js are suitable for mac development. The webview of iOS is still

DKNightVersion implementation and dknightversion implementation In fact, many software programs that require heavy reading or watching at night will regard the night mode as a feature required by an App. on the basis of not changing the original

IOS development diary 58-ad carousel collectionView, 58-collectionview Today, a blogger needs to use collectionView to create ad carousel images and has encountered some difficulties. I would like to share with you the hope to make common

Limit the length of UITextField input. I. Preface For example, I can only enter 11 characters in textfield. If I enter more characters, only 11 characters in textfield will be displayed. If ReactiveCocoa is used, this is a good solution. However,

Controller redirection between Storyboard and Xib in iOS It should be noted in the following four cases! Xib. controller Xib. controller Storyboard. controller Storyboard. controller Storyboard. controller Xib. controller Xib. controller

IOS UITableView solution for loading images with unknown width and height, During development, the UITableView list UITableViewCell loads images but does not know the width and height of the Image. To solve this problem, we first think of

Objective-C keywords: retain, assgin, copy, readonly, atomic, nonatomic, objective-cassginUse of declarative attributes: declarative attributes are called the compile-time syntax @ property (retain, nonatomic) Some * s; @ property (parameter 1,