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UIRefreshControl on UICollectionView only works if the collection fills the height of the container
... a UIRefreshControl
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
refreshControl.tintColor = [UIColor grayColor];
[refreshControl addTarget:self action:@selector(refershControlAction) forControlEvents:UIControlEventValueChanged];
[self.collectionView addSubview:refreshControl]...
How to force garbage collector to run?
...seem more useful to have generations stay put unless enough stuff has been allocated in one to justify advancing it.
– supercat
Nov 23 '10 at 15:42
2
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Setting an image for a UIButton in code
...rolEventTouchUpInside];
UIBarButtonItem *jobsButton =
[[UIBarButtonItem alloc] initWithCustomView:listButton];
self.navigationItem.leftBarButtonItem = jobsButton;
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Java integer to byte array
...
using Java NIO's ByteBuffer is very simple:
byte[] bytes = ByteBuffer.allocate(4).putInt(1695609641).array();
for (byte b : bytes) {
System.out.format("0x%x ", b);
}
output:
0x65 0x10 0xf3 0x29
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How to initialize an array in Java?
...
When you create an array of size 10 it allocated 10 slots but from 0 to 9.
This for loop might help you see that a little better.
public class Array {
int[] data = new int[10];
/** Creates a new instance of an int Array */
public Array() {
fo...
Java - removing first character of a string
...u are actually creating a new string with all the overhead implied (memory allocation and garbage collection). So if you want to make a series of modifications to a string and care only about the final result (the intermediate strings will be dead as soon as you 'modify' them), it may make more sen...
How to hide elements without having them take space on the page?
...ility: hidden
visibility:hidden means the tag is not visible, but space is allocated for it on the page.
display:none means completely hides elements with its space. (although you can still interact with it through the DOM)
...
Bordered UITextView
...roundColor = [UIColor clearColor];
UIImageView *borderView = [[UIImageView alloc] initWithFrame: CGRectMake(0, 0, textView.frame.size.width, textView.frame.size.height)];
borderView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
UIImage *textFieldImage = [[UII...
Produce a random number in a range using C#
... Darrelk answer.
It is implemented using C# extension methods.
It does not allocate memory (new Random()) every time this method is called.
public static class RandomExtensionMethods
{
public static double NextDoubleRange(this System.Random random, double minNumber, double maxNumber)
{
...
How do I use extern to share variables between source files?
...ler is informed that a
variable exists (and this is its type); it does not allocate the
storage for the variable at that point.
A variable is defined when the compiler allocates the storage for
the variable.
You may declare a variable multiple times (though once is sufficient);
you may only defin...