大约有 42,000 项符合查询结果（耗时：0.0808秒） [XML]
Semantic Issue: Property's synthesized getter follows Cocoa naming convention for returning 'owned'
...5 SDK trying to develop my app.
I'm trying to make an NSString a property, and then to synthesize it in the .m file (I have done this before with no issues). Now, I came across this: "Semantic Issue: Property's synthesized getter follows Cocoa naming convention for returning 'owned' objects."
...
Any idea why I need to cast an integer literal to (int) here?
...comments the cast to int works as intended, because it is a reserved word and therefore can't be interpreted as an identifier, which makes sense to me.
And Bringer128 found the JLS Reference 15.16.
CastExpression:
( PrimitiveType Dimsopt ) UnaryExpression
( ReferenceType ) UnaryExpressio...
Using context in a fragment
...
I was reading this Google blog on memory leaks...android-developers.blogspot.com/2009/01/… . If I use the getActivity() method would the app not be at risk of memory leaks? The blog suggests "Try using the context-application instead of a context-activity" which isn't rea...
Python ValueError: too many values to unpack [duplicate]
...
self.materials is a dict and by default you are iterating over just the keys (which are strings).
Since self.materials has more than two keys*, they can't be unpacked into the tuple "k, m", hence the ValueError exception is raised.
In Python 2.x, t...
Find out whether Chrome console is open
...roach works on Chrome 78, with the added advantage of detecting both close and open events.
function toString (2019)
Credit to Overcl9ck's comment on this answer. Replacing the regex /./ with an empty function object still works.
var devtools = function() {};
devtools.toString = function() {
i...
How to change Status Bar text color in iOS
...redStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
Swift 5 and SwiftUI
For SwiftUI create a new swift file called HostingController.swift
import Foundation
import UIKit
import SwiftUI
class HostingController: UIHostingController<ContentView> {
override var preferredStatu...
Why is 'this' a pointer and not a reference?
I was reading the answers to this question C++ pros and cons and got this doubt while reading the comments.
2 Answers
...
Is returning null bad design? [closed]
...ationale behind not returning null is that you do not have to check for it and hence your code does not need to follow a different path based on the return value. You might want to check out the Null Object Pattern which provides more information on this.
For example, if I were to define a method ...
What is “Linting”?
PHPLint , JSLint , and I recently came across "you can lint your JS code on the fly" while reading something about some IDE .
...
Trying to git pull with error: cannot open .git/FETCH_HEAD: Permission denied
...ecause your user doesn't have the permissions for changing that directory, and the second because your root user doesn't have the right SSH keys for accessing that git repository.
Depending on what you're trying to do, it might be better to clone the repository to a different directory, or maybe ch...