coursera ios app development basics

efficiency2. Frame Address:Https://github.com/SnapKit/Masonry3.mas_equalto and EqualtoBy defaultMas_equalto has automatic packaging function, such as automatic packaging of 20 for the @20Equalto No automatic packaging functionIf you add the following macro, then Mas_equalto and Equalto are no different#define Mas_shorthand_globalsNote: This macro must be added to the front of #import "Masonry.h"4.mas_width and WidthBy defaultWidth is a property of the Make object that is used to add a width con

properties of the objectThe member methods for modifying struct properties are as follows:(1) Using temporary variables to record the structure properties of an object(2) Modifying the properties of temporary variables(3) To reset temporary variables to the structure properties of an object3. Need to avoid magic numbers in program development (magic number)Use enum types to avoid magic numbers in your program(1) An enumeration type is essentially an

iOS Development UI Basics-handwriting controls, Frame,center and Bounds propertiesfirst, the handwriting control1. Steps for Handwriting control(1) Create a control object with the appropriate control class(2) Set various properties of the control(3) Adding controls to the view(4) If the control is a button, you also need to consider the control's click event, et

, Uibarbuttonsystemitemundo, Uibarbuttonsystemitemredo, uibarbuttonsystemitempagecurl// can only be displayed on toolbar3: How to modify the color of the headerSelf.navigationcontroller.navigationbar.tintcolor=[uicolor Redcolor];4: Add other Uisegment,uiswith controlsAdd the following code to the Viewdidload on this pageUisegmentedcontrol *mysegment; Mysegment= [[Uisegmentedcontrol alloc] Initwithframe:cgrectmake (218.0f,8.0,100.0f,30.0f)]; [Mysegment insertsegmentwithtitle:@"Distribut

userinfo and traverse all the notification to delete it.4:does not contain Bitcode/USERS/**/FRAMEWORK/SDKS/POLYMERPAY/LIBRARY/MOBSTAT/LIB**SDK.A (**FORSDK.O) ' does not contain bitcode. You must rebuild it with Bitcode enabled (Xcodesetting enable_bitcode), obtain a updated library from the vendor, or DISA Blebitcode for this target. For Architecture arm64Either let the third-party library support or turn off the target's bitcode option.In fact, in Xcode 7, when we create a new

to get the long-width data for the label, which is a list of some common computational methods.1. Get the width to get the length of the string without wrapping the row lineCgsize titlesize = [astring sizewithfont:font constrainedtosize:cgsizemake (Maxfloat, 30)];Note: The width of size should be set to maxfloat if it is desired.2. Gets the height that gets the actual height required for the string to wrap within the specified size (the width of the label is more than the line).Cgsize titlesize

, uibarbuttonsystemitemflexiblespace, Uibarbuttonsystemitemfixedspace, uibarbuttonsystemitemcompose, uibarbuttonsystemitemreply, Uibarbuttonsystemitemaction, uibarbuttonsystemitemorganize, Uibarbuttonsystemitembookmarks, Uibarbuttonsystemitemsearch, Uibarbuttonsystemitemrefresh, uibarbuttonsystemitemstop, Uibarbuttonsystemitemcamera, Uibarbuttonsystemitemtrash, Uibarbuttonsystemitemplay, Uibarbuttonsystemitempause, Uibarbuttonsystemitemrewind, Uiba

Multithreading basics in iOS developmentTime-consuming operation drill code walkthrough compilation time-consuming Method - (void)longOperation { for (int i = 0; i Call the time-consuming method directly // 1> directly call the time-consuming method [self longOperation]; Running Test Results How to execute time consumption in the background // 2> run the time consumption method in the background [self

properties of the objectThe member methods for modifying struct properties are as follows:(1) Using temporary variables to record the structure properties of an object(2) Modifying the properties of temporary variables(3) To reset temporary variables to the structure properties of an object3. Need to avoid magic numbers in program development (magic number)Use enum types to avoid magic numbers in your program(1) An enumeration type is essentially an

Objective-C (19th, notification-one of the message sending modes)-iOS development basics, objective-cios Combine the previous study notes and refer to Objective-C programming full solution (Third edition) To summarize Objective-C knowledge points. Knowledge points keep changing, just for reference,Take the official documents of Apple as standard~ 19. Notificatio

Nswindows, Nstextview, Nsfont, Nsimage, and so on in lion Releasenote cannot use weak references, but it is unclear whether future support is forthcoming, or whether the future of the current auto-nil will continue to support.Add the above modifiers to the object before usingFor example:__unsafe_unretained Person* p;4 . Automatic nil of weak pointerThe weak pointer automatically becomes nil when the instance object it points to is freed;That is, if the instance object pointed to by the weak poi

];if (sz.width 16: Use of a string with attributes (nsmutableattributedstring)1. Create object NSString *original = @ "Are you all right today?"　　"; nsmutableattributedstring *attrtitle = [[Nsmutableattributedstringalloc] initwithstring:original];2. Set the Color (　　　　　　Nsforegroundcolorattributename to set the color, value for value, range for scope)/** Other settings: 1.NSForegroundColorAttributeName//color 2.NSFontAttributeName//font 3.NSBackgroundColorAttributeName//Background color//There a

Continue to optimize the code in IOS development Fundamentals-Nine (5).Optimization thinking: The dictionary to model part of the data processing operations also get to the model class to achieve, will be Viewcontroller class implementation of the application method to move to the Wjqappinfo class implementation.Instance CodeAdd an out-of-the-box interface to the WJQAppInfo.h , which returns a well-handled

%totalcolumn;//column number, starting from 0 -CGFloat appviewx = margin + (margin + appviewwidth) * column;//x-coordinate of the child view -CGFloat appviewy = margin + (margin + appviewheight) * ROW;//the y-coordinate of the child view theWjqappinfo *appinfo =Self.apps[i]; - - //Creating UIView Controls -Nsarray *apparray = [[NSBundle mainbundle] loadnibnamed:@"Appxib"Owner:nil Options:nil]; +Wjqappview *appview =[Apparray Firstobject]; -Appview.frame =CGRectMake (appviewx, Ap

Bottom,left, right margin constraints, the constraint value is 20, the implementation of the effect is as follows:Implementation step four: Set the relative distance between the three view, check VIEW2 set lift constraints back to find there are two options, a value is smaller, a value is larger, the default is the value is smaller, the value of the smaller option is relative view1 distance value is relatively super View distance, where the default constraint values are used:Using the same meth

IOS development diary 17-runtime basics, ios17-runtime Today, the blogger has a basic runtime requirement and encountered some difficulties. I would like to share with you the hope to make common progress. Objective-C runtime is a runtime Library mainly written in C and assembly languages. It creates Objective-C by adding object-oriented capabilities to C languag

Continuation: iOS Development Basics-Image Switching (2), the code inside (2) is improved with the attribute list plist.　　The new property List is named Data to obtain a file with a suffix of . plist .Press to modify the file you just created:Finally, modify the Infoarray getter Method:1 //The Getter method of Infoarray2-(Nsarray *) Infoarray {3NSLog (@"need to

Imagenamed:filename]; Size=image.size; [Butterflies addobject:image]; } //Begin the animationbutterfly = [[Uiimageview alloc] initWithFrame: (cgrect) {. size=size}]; [Butterfly setanimationimages:butterflies]; Butterfly.animationduration=0.75f; [Butterfly startanimating]; //Set The butterfly ' s initial speed and accelerationXaccel =2.0f; Yaccel=2.0f; Xvelocity=0.0f; Yvelocity=0.0f; //Add The ButterflyButterfly.center =Rectcenter (self.view.bounds); [Self.view addsubview:but

iOS Development UI Basics-Install official Apple docs and Xcode simulatorTip: Prepare your data(1) Com.apple.adc.documentation.appleios7.1.ioslibrary.docset.zip(2) Iphonesimulator6.1.sdk.zipFirst, install Apple official documents1. Installation pathThe document has two installation paths:(1) ~/Resource Library/developer/xcode/userdata/(2)/applications/xcode.app/c

= Self.view.center; Hexagonbutton.block = ^ () { NSLog (@ "Hexagon area is clicked"); }; [Self.view Addsubview:hexagonbutton];7:self.navigationcontroller.viewcontrollers modificationvar Controllerarr = Self.navigationcontroller?. viewcontrollers//get controller array Controllerarr?. RemoveAll ()//Remove historical path saved in Controllerarr //re-add New path Controllerarr?. Append (Self.navigationcontroller?). Viewcontrollers[0]) Controllerarr?. Append (C) Controllerarr? App