大约有 11,500 项符合查询结果（耗时：0.0220秒） [XML]
Changing UIImage color
...
Since iOS 7, this is the most simple way of doing it.
Objective-C:
theImageView.image = [theImageView.image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[theImageView setTintColor:[UIColor redColor]];
Swift 2.0:
theImageView.image = theImageView.image?.imageWit...
How do I use regex in a SQLite query?
I'd like to use a regular expression in sqlite, but I don't know how.
17 Answers
17
...
How to dump a table to console?
I'm having trouble displaying the contents of a table which contains nested tables (n-deep). I'd like to just dump it to std out or the console via a print statement or something quick and dirty but I can't figure out how. I'm looking for the rough equivalent that I'd get when printing an NSDicti...
Get exception description and stack trace which caused an exception, all as a string
I've seen a lot of posts about stack trace and exceptions in Python. But haven't found what I need.
11 Answers
...
What can you use Python generator functions for?
...hose that have a yield statement in them. I want to know what types of problems that these functions are really good at solving.
...
What's wrong with nullable columns in composite primary keys?
...
Primary keys are for uniquely identifying rows. This is done by comparing all parts of a key to the input.
Per definition, NULL cannot be part of a successful comparison. Even a comparison to itself (NULL = NULL) will fail. This means a key containing NULL would not work.
Additonall...
How do I check out a remote Git branch?
Somebody pushed a branch called test with git push origin test to a shared repository. I can see the branch with git branch -r .
...
Fast permutation -> number -> permutation mapping algorithms
...'s say, 7 elements, 1234567. I know there are 7! = 5040 permutations possible of these 7 elements.
12 Answers
...
Is it possible to listen to a “style change” event?
Is it possible to create an event listener in jQuery that can be bound to any style changes? For example, if I want to "do" something when an element changes dimensions, or any other changes in the style attribute I could do:
...
Does Swift have access modifiers?
In Objective-C instance data can be public , protected or private . For example:
17 Answers
...