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Save An Image To Application Documents Folder From UIView On IOS
I have a UIImageView that allows a user to place and hold an image until it can be saved. The problem is, I can't figure out how to actually save and retrieve the image I've placed in the view.
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Changing UIImage color
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Swift 4.2 Solution
extension UIImage {
func withColor(_ color: UIColor) -> UIImage {
UIGraphicsBeginImageContextWithOptions(size, false, scale)
guard let ctx = UIGraphicsGetCurrentContext(), let cgImage = cgImage else { return self }
color.setFill()
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How to remove unreferenced blobs from my git repo
...and without further ado, may I present to you this useful command, "git-gc-all", guaranteed to remove all your git garbage until they might come up extra config variables:
git -c gc.reflogExpire=0 -c gc.reflogExpireUnreachable=0 -c gc.rerereresolved=0 -c gc.rerereunresolved=0 -c gc.pruneExpire=now ...
Convert decimal to hexadecimal in UNIX shell script
...e=16; 123456" | bc. So the way to deal with arbitrary numbers of integers all on one line is to put each number on its own line: tr ' ' '\015' <input | bc (map blanks to newlines).
– Jonathan Leffler
Dec 25 '08 at 20:40
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一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...: 0xf4767e
[Expert Info (Note/Checksum): CRC unchecked, not all data available]
来源：https://www.yiqi.com/zt5765/news_36129.html
How to disable UITextField editing but still accept touch?
I'm making a UITextField that has a UIPickerView as inputView . Its all good, except that I can edit by copy, paste, cut and select text, and I don't want it. Only the Picker should modify text field.
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UTF-8 all the way through
... this in the past on existing servers and always seem to end up having to fall back to ISO-8859-1.
15 Answers
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理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...-vm:47388kB, anon-rss:3744kB, file-rss:80kB
httpd invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0
httpd cpuset=/ mems_allowed=0
Pid: 8911, comm: httpd Not tainted 2.6.32-279.1.1.el6.i686 #1
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21556 total pagecache pages
21049 pages in swap cache
Swap cache s...
How to use background thread in swift?
...syntax without some modifications. Passing QOS_CLASS_BACKGROUND didn't actually work, instead use Int(QOS_CLASS_BACKGROUND.value).
For more information see Apples documentation
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Advantage of switch over if-else statement
... the average case) or simply build a jump-table (works without compares at all).
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