learn objectivec on the mac learn series pdf

... Trang 1The other part of a class’s source is the implementation The @implementation section tells the Objective- C compiler how to make the class actually work This section contains the code ... see the entire contents of the class to correctly calculate the location of the instance variables Next on the operating table is Slant6 Create the Slant6.m and Slant6.h files in Xcode, and then ... sometimes, the compiler only needs to know the name of the class, rather than its entire definition For example, when objects are composed (as you saw in the last chapter), the tion uses pointers

Ngày tải lên: 12/08/2014, 20:22

... Trang 4The last button is step out (press ⌘⇧ T), which will let the current function finish and then return control to you on the next line of the calling function If you’re following along, don’t ... Description ⌘ [ Shift the code block to the left ⌘ ] Shift the code block to the right Control- (period) Cycle through the completions Shift-control- (period) Cycle backward through the completions Control-/ ... Control-N Move the cursor to the next line Control-A Move the cursor to the beginning of the line Control-E Move the cursor to the end of the line (continued) Trang 6 Table 7-1 (continued)Keystroke

Ngày tải lên: 12/08/2014, 20:22

... allocation and initialization in a single operation using a constructor Objective- C splits the two operations into explicit allocation and initialization stages A common beginner’s error is to use only ... management conventions They’re pretty simple rules, and they’re applied consistently throughout the toolkit NOTE Forgetting these rules is a common mistake, as is trying to make them too complicated ... the controls decides to click the mouse or press a key When one of these events does hap-pen, the program wakes up and gets to work doing whatever is necessary to respond to the event After the

Ngày tải lên: 12/08/2014, 20:22

... retain (own) the engine but not the other way around. The engine should not retain the car it has been installed in. If the car retains the engine, and the engine retains the car, then neither refer- ... releases the Engine. They just sit there, staring at each other, waiting for the other to blink. The general rule is that the owner object retains the ownee object, and not the other way around. ... parentheses... bit Categories have two limitations The first is that you can’t add new instance variables to a class There’s nowhere to put them The second limitation concerns name collisions,

Ngày tải lên: 12/08/2014, 20:22

... this project The first thing to do is create the project files Then, we’ll lay out the user interface, and finally, we’ll make the connections between the UI and the code Figure 14-1 The finished ... interface has grown the protocol-adoption syntax: @interface Tire : NSObject <NSCopying> and now the implementation of copyWithZone:: - (id) copyWithZone: (NSZone *) zone You can see the [[self ... 14-5 Name the new class. Trang 17CHAPTER 14: Introduction to the AppKit 252 Making the AppController @interface We’ll use the Interface Builder application to lay out the window’s contents and

Ngày tải lên: 12/08/2014, 20:22

... 18When the preceding code is run, you get this:“union” part of the name refers to taking the union of a bunch of objects The “distinct” part of the name weeds out all of the duplicates There are ... attri-bute, the remaining part of the key path is sent to every object in the array OUT OF MANY, ONE Since you now know about to-many relationships, you’re probably wondering what a to-one relationship ... initialization of the cars array; we only create it when neces-sary -dealloc cleans up the name and the array, and -print walks through the array and prints out the cars We’ve also totally overhauled the

Ngày tải lên: 12/08/2014, 20:22

... a” relationship, 86using appropriately, 86 Connections panel, 260Console window, 7, 15CONTAINS operator, 305context pointers, 308continue button, 126convenience initializersadding to the Tire ... thought on whether this is a good idea One camp says that redeclaring pro-vides information to the reader about which changes the class makes to its superclasses, while the other faction says ... fit in seamlessly with the platform. To have the compiler treat your code as Objective-C++, use the mm file extension on your source The M extension also works, but the Mac’s HFS+ file system

Ngày tải lên: 12/08/2014, 20:22

... that, among the minimum-cost choices of batch 2 satisfying the first two conditions, there is one that also satisfies the third An exception to the second condition occurs when the fractional jobs ... address both the question of which sources to consult and when to consult them whereas the cost model addresses only the latter Figure 1 summarizes the problems we address within the reward and ... schedule can consume In the threshold cases the problem is to find the schedule with the maximum expected value subject to the constraint that the schedule never violates the threshold constraint(s)

Ngày tải lên: 29/03/2014, 20:20

... administration facilities Block E for conversion to Child Studies with a disabled access to all 3 floors. Siteworks include the consolidation of existing educational precincts of the Campus and the construction ... held on the south coast of NSW and the cover graphics make use of the dramatic local landscape. PIA NSW DIVISION CONFERENCE Wollongong, NSW 14-16 November 2004 Managing change Imagining the Future ... 520 684 Conference flyer This peak mining body holds annual conferences to inform their members of the latest developments and issues confronting their industry The project required the design

Ngày tải lên: 31/03/2014, 15:20

... feeling for the next stepping-stone Once more Joey, pretending to be nonchalant, kicked another of the stepping-stones out of the way Steven, having memorised the position of the stepping-stones, ... take a risk then.' He reached inside one of the cupboards and pulled a ballerina doll out, then pulled the second one out He dumped them both on the floor Next, he moved down to the second cupboard ... turn on the scanner.' 'But Doctor, don't you think -' Dodo began 'Don't ask questions,' said the Doctor 'We may not have time Turn on the scanner now.' Steven ran over to the control console

Ngày tải lên: 30/05/2014, 22:55

... attempt to get donors who were early in their illness, "A few of the donors were in the first day of the disease Others were in the second or third day of the disease." "Then we proceeded ... demonstrable seasonal variations, population variations, and a mechanism of action To make sense of influenza's epidemiology, we revise Hope-Simpson theory, hypothesizing marked variation in the ... epidemiological contradictions When seasonal and population variations in innate immunity are considered in context with the novelty, transmissibil-ity, and virulence of the attacking virus, the conundrums

Ngày tải lên: 20/06/2014, 01:20

... positive constants and the initial conditions x−1, x0are positive numbers Motivating by the above papers, we study now the boundedness, the persistence, the existence of unbounded solutions, the attractivity, ... ˘gacik Zafer In this paper we study the boundedness, the persistence, the attractivity and the stability of the positive solutions of the nonlinear difference equation xn1  α  x p n−1 /x q n , ... the stability of the positive solutions, and the two-period solutions of the difference equation x n1  A  x p n−1 x n q , n  0, 1, , 1.4 where A, p, and q are positive constants and the

Ngày tải lên: 21/06/2014, 20:20

... tracking the signal subspace recursively It is based on an interpretation of the signal subspace as the solution of a constrained minimization task This algorithm, referred to as the constrained ... division multiple access (CDMA) systems The conventional methods for extracting the desired infor-mation about the signal and noise subspaces are achieved by either the eigenvalue decomposition ... decomposition (EVD) of the covariance data matrix or the singular value decomposition (SVD) of the data matrix However, the main drawback of these conventional decompositions is their inherent complexity

Ngày tải lên: 21/06/2014, 22:20

... [17] the connections to the (modified) classical Yang-Baxter relation are studied In Kreimer’s work [19, 20] the connection of the Rota-Baxter relation to the Riemann-Hilbert problem in the realm ... ∗On leave from Bonn University, Phys Inst., Theory Dept This work was done when the author was visiting the Center for Mathematical Physics at Boston University, 111 Cummington Street, Boston, ... Nijenhuis algebra, thereby giving an explicit construction of the latter This section closes with a remark concerning the connection to Loday-type algebras Throughout this paper, we will consider K to

Ngày tải lên: 07/08/2014, 08:20

... under the previous sentence make sure they mention that we add an -s to the verb in the third person routine Draw their attention to the icons in the text and tell them that the corresponding ... they would like to include these terms on the board with the others and observe how the terms on the board relate to the image the questions on page 9 Then discuss with the whole class Pages 10 ... 2 questions Allow them some time to read the questions and focus on the information they need to hear can write their answers down volunteers to read their answers and write them on the board

Ngày tải lên: 30/08/2023, 16:36

... Based on the theoretical foundation and empirical evidence, The thesis designs the research model, forecasts the regression equation, explains the variables, and formulates the research hypotheses ... There is no correlation between the error component of the cross-unit and the explanatory variable H1: There is a correlation between the error component of the cross-unit and the explanatory variable ... exogenous.The second-order autocorrelation test (AR2) is to test the quadratic correlation of residuals in the model with the following hypothesis: H0: No quadratic correlation of residuals H1: There

Ngày tải lên: 13/09/2023, 16:09

... the variables from the information in the past, analyze the relationship between the dependent variables (the profitability) and the independent variables (the factors) along with the relationship ... that, the author makes some practical suggestions for the companies and the governments considering the study's conclusions Lastly, identify the limitations of the result and propose directions ... and concluded that none of these variables affecting on the profitability of pharmaceutical sub-sector corporations listed on the Indonesian Stock Exchange In China, there was a study done by

Ngày tải lên: 10/07/2024, 16:20

... correlation in the regression model If these assumptions are violated, the regression coefficients lose their effectiveness In such cases, the FGLS method is used to address these violations The FGLS ... necessary to carry out the correction of the defect of the regression model using the GLS regression method To test whether there is an autocorrelation phenomenon or not, the Wooldridge test method ... inventory conversion period (ICP) Inventory accumulates when there is a mismatch between the production timeline and the sales duration The greater the production delays and inefficiencies, the more

Ngày tải lên: 10/07/2024, 16:28

... reflect the entire situation of factors affecting the efficiency of steel enterprises Secondly, the thesis only focuses on analyzing the impact on the dependent variable of ROA but not on other ... explored the effects of monetary shocks and developed a monetary theory to control inflation and stabilize the economy Robert Lucas, Jr (1981) is well-known for the Rational Expectations Hypothesis ... supply shocks and their impact on the business cycle and Friedrich Hayek (1931) investigated the effects of economic shocks on the production structure and prices within the economy The COVID-19 pandemic

Ngày tải lên: 02/10/2024, 15:33

... tại; cũng trong trao đổi, hay lưu thông, phải thực hiện theonguyên tắc ngang giá- tức là giá cả phải bằng giá trị Quy luật giá trị buộc nhữngngười sản xuất và trao đổi hàng hoá phải tuân theo “mệnh ... trong hai thì không phải là hàng hóa Một vật cógiá trị sử dụng nhưng không do lao động của con người làm ra thì không được coi Trang 7là hàng hóa(không khí, năng lượng mặt trời…); Mộ vật do con ... tồn tại trong một hàng hóa nhưng quá trình thực hiện chúngtách rời cả về không gian lẫn thời gian: giá trị được thực hiện trước trong quá trình SX lưu thông, GTSD được thực hiện sau trong quá trình

Ngày tải lên: 07/08/2014, 00:20