HarrisHan
/ gist:a71b7584d10adf6478fb8c4749128574
Created
January 11, 2017 08:11
beginningOfDay and endOfDay
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| + (NSDate *)beginningOfDay:(NSDate *)date; | |
| { | |
| NSCalendar *cal = [NSCalendar currentCalendar]; | |
| NSDateComponents *components = [cal components:( NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitYear | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond ) fromDate:date]; | |
| [components setHour:0]; | |
HarrisHan
/ this is a category for NSString to calculate the lengh of a string
Last active
August 20, 2016 05:46
limit textField textView input char length
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| + (NSUInteger)countLengthOfString:(NSString *)textString { | |
| NSUInteger strlength = 0; | |
| char *p = (char *)[textString cStringUsingEncoding:NSUnicodeStringEncoding]; | |
| for (int i = 0; i < [textString lengthOfBytesUsingEncoding:NSUnicodeStringEncoding]; i++) { | |
| if (*p) { | |
| p++; | |
| strlength++; |
darkfall
/ gist:13001c901edf0dc9fb85
Last active
January 24, 2021 10:03
get objc subclasses via private runtime info
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| #include <objc/objc-runtime.h> | |
| // from objc_runtime_new.h with some simplifications | |
| #if __LP64__ | |
| typedef uint32_t mask_t; | |
| #define FAST_DATA_MASK 0x00007ffffffffff8UL | |
| #else | |
| typedef uint64_t mask_t; | |
| #define FAST_DATA_MASK 0xfffffffcUL |
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| //计算NSString中英文字符串的字符长度。ios 中一个汉字算2字符数 | |
| - (int)charNumber:(NSString*)strtemp | |
| { | |
| int strlength = 0; | |
| char* p = (char*)[strtemp cStringUsingEncoding:NSUnicodeStringEncoding]; | |
| for (int i = 0; i < [strtemp lengthOfBytesUsingEncoding:NSUnicodeStringEncoding]; i++) { | |
| if (*p) { | |
| p++; | |
| strlength++; | |
| } else { |
steipete
/ PSPDFUIKitMainThreadGuard.m
Last active
May 27, 2024 12:11
This is a guard that tracks down UIKit access on threads other than main. This snippet is taken from the commercial iOS PDF framework http://pspdfkit.com, but relicensed under MIT. Works because a lot of calls internally call setNeedsDisplay or setNeedsLayout. Won't catch everything, but it's very lightweight and usually does the job.You might n…
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| // Taken from the commercial iOS PDF framework http://pspdfkit.com. | |
| // Copyright (c) 2014 Peter Steinberger, PSPDFKit GmbH. All rights reserved. | |
| // Licensed under MIT (http://opensource.org/licenses/MIT) | |
| // | |
| // You should only use this in debug builds. It doesn't use private API, but I wouldn't ship it. | |
| // PLEASE DUPE rdar://27192338 (https://openradar.appspot.com/27192338) if you would like to see this in UIKit. | |
| #import <objc/runtime.h> | |
| #import <objc/message.h> |
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| ; A minimal Mach-o x64 executable for OS X (also see below Mountain Lion version) | |
| ; | |
| ; $ nasm -f bin -o tiny_hello tiny_hello.s | |
| ; $ chmod +x tiny_hello | |
| ; $ ./tiny_hello | |
| ; Hello World! | |
| ; $ | |
| ; c.f. | |
| ; http://osxbook.com/blog/2009/03/15/crafting-a-tiny-mach-o-executable/ ( the original tiny mach-o executable ) |