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Mathematical functions in Swift
How do I use mathematical functions like sqrt() , floor() , round() , sin() , etc?
6 Answers
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How to disable/enable the sleep mode programmatically in iOS?
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You can disable the idle timer as follows;
In Objective-C:
[UIApplication sharedApplication].idleTimerDisabled = YES;
In Swift:
UIApplication.sharedApplication().idleTimerDisabled = true
In Swift 3.0 & Swift 4.0:
UIApplication.shared.isIdleTimerDisabled = true
Set it back to NO or f...
内存调试技巧：C 语言最大难点揭秘 - C/C++ - 清泛网 - 专注C/C++及内核技术
...发团队对其制定明确的管理计划。但好消息是，它们并不怎么神秘。引言
C 和 C++ 程序中的内存错误非常有害：它们很常见，并且可能导致严重的后果。来自计算机应急响应小组（请参见参考资料）和供应商的许多最严重的安全...
Error when testing on iOS simulator: Couldn't register with the bootstrap server
...me changes to the code and built the app again. Now when I run the application, I get this error in the console
31 Answers
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Where to store global constants in an iOS application?
Most of the models in my iOS app query a web server. I would like to have a configuration file storing the base URL of the server. It will look something like this:
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Get a list of all the files in a directory (recursive)
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This code works for me:
import groovy.io.FileType
def list = []
def dir = new File("path_to_parent_dir")
dir.eachFileRecurse (FileType.FILES) { file ->
list << file
}
Afterwards the list variable contains all files (java.io.File) of the given direc...
Presenting a UIAlertController properly on an iPad using iOS 8
With iOS 8.0, Apple introduced UIAlertController to replace UIActionSheet . Unfortunately, Apple didn't add any information on how to present it. I found an entry about it on hayaGeek's blog, however, it doesn't seem to work on iPad. The view is totally misplaced:
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Printing the correct number of decimal points with cout
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With <iomanip>, you can use std::fixed and std::setprecision
Here is an example
#include <iostream>
#include <iomanip>
int main()
{
double d = 122.345;
std::cout << std::fixed;
std::cout <<...
How do I change the color of the text in a UIPickerView under iOS 7?
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There is a function in the delegate method that is more elegant:
Objective-C:
- (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *title = @"sa...
How does View Controller Containment work in iOS 5?
In WWDC 2011 Session 102, Apple introduced View Controller Containment, which is the ability to create custom view controller containers, analogous to UITabBarController , UINavigationController , and the like.
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