how to quickly initialize a two-dimensional array to the same element in OC, and modify the value of one of the elements for example, to initialize an array of length 50, and each element has a value of @ "a", then modify the value of array [10] [10] to @ "1"?
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1. If I call the function of js natively, I am not sure what the scope of the function of js is. I packaged the node module with bowseriry and wanted to expose the function I wrote to the native call . For example, the global domain of window,node in the...
I used a UITableView, in the project. This UITableView has three cell. There is a need to refresh the first cell, which will change the height of the cell. While changing the height of the first cell, the second and third cell will move, and this moveme...
I have tried the CoreData modification operation in Demo as follows: 1, first create a new basic table and add fields, then add some data in app 2, exit app, new table, add new fields, add Relationships 3, and there is no flicker after rerunning the ...
opening the local address with safari in Xcode simulator can t catch the package (charles), but you can catch it by opening any other website. You can also catch it by directly accessing the local address with chrome without simulator,. I wonder if a...
popularize the QR code what to do when 1 out of 1 million people cannot generate a QR code? ...
what to do when the address selected on DiDi s home page of app can be pushed to the top? ...
if the label is loaded with an English article, click label and want the word in the click location to have a background color. So to get the position of the character to be clicked, then match the spaces before and after to get the complete word, and th...
when I wanted to share Mini Program after integrating ios Wechat sdk, I found that I kept prompting Use of undeclared identifier WXMiniProgramObject Android to integrate properly and I searched the Internet for a long time but did not find any relat...
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according to the runtime hook technology shared by the online gods, I want to do it myself < H2 > principle: intercept the ViewDidiLoad method of the controller, and realize the method exchange. The effect is obvious and effective < H2 >. as shown...
first of all, other colleagues in the company have no problem. We pull the same way, the same project configuration, and each project is placed in the same location. then run directly and the associated three project.a cannot be found, but three Projec...
do hybrid development, installed xcode simulator, but now can not debug the web page. I checked on the Internet and found that there is no web checker option in the advanced options of the simulator. My colleague s computer is pro s, mine is air s, a...
what s the difference between NSStringFromClass (self) and NSStringFromClass ([self class])? ...
although I read the official document, my actual operation is not at all as the document says Note: use [MagicalRecord setupAutoMigratingCoreDataStack]; initialize 1. The official document mainly gives a simple modification while adding Model Version c...
recently, I have been studying iOS APP development. I have seen some foreign introductory books and videos, all of which are taught in the form of drag-and-drop + code. I feel that the acceptance is OK. But I asked my friends who are doing iOS developer...
request that many news interfaces are used. After the drop-down refresh, a prompt box comes out and studies how this is not found. Does anyone know? is the yellow box that has updated 8 pieces of information for you ...
as mentioned above, how to implement it in OC? ...
each cell is filled with a picture, and the picture is automatically filled with cell according to the cell width and the aspect ratio of the picture question: sdwebimage celltableviewcell ...
how to compile lame3.1.0? I directly make reported that I couldn t find X841464 ....
I drag the folder containing the Xcode project onto OmniGraffle, and the following dialog box pops up automatically ...