nsstring

How to convert string value into date in iPhone?

由 ぐ巨炮叔叔 提交于 2020-01-15 11:11:46
问题 I want convert string value into date in my project because I am fetching XML value from web. In XML file I get weather condition and there all value in this weather condition I get current date but my forecastcondition is not come in date it comes in string value, like this: friday saturday and sunday Like this value are come in my forecast condition day this string value come in Day_of_week [Day_of_week] means it shows like this: friday,saturday,sunday How can I convert this string value

Where are constant NSStrings allocated?

由 佐手、 提交于 2020-01-15 09:34:36
问题 I understand that constant CStrings are allocated statically, rather than on the heap. I also noticed that constant NSStrings have an infinite retain count. Does it hold true that constant NSStrings are also allocated statically, rather than on the heap? 回答1: Constant NSStrings are of class NSConstantString , and thus act like atoms in lisp; they hang around. -> NSConstantStrings are allocated statically. That is, if you use @"cow" in two separate places in your code, they will be referencing

ios十进制、十六进制字符串，byte，data等之间的转换

由 可紊 提交于 2020-01-15 07:06:43
十进制->十六进制 Byte bytes[]={ 0xA6, 0x27, 0x0A}; NSString *strIdL = [ NSString stringWithFormat : @"%@" ,[[ NSString alloc ]initWithFormat : @"%02lx" ,( long )bytes[ 0 ]]]; 十 六进制->十进制 NSString *rechargeInfo = @ "0xff055008" ; NSString *cardId2 = [ rechargeInfo substringWithRange :NSMakeRange ( 2 , 2 )]; cardId2 = [ NSString stringWithFormat : @"%ld" ,strtoul ([cardId2UTF8String ], 0 , 16 )]; NSString *str = @ "0xff055008" ; //先以16为参数告诉strtoul字符串参数表示16进制数字，然后使用0x%X转为数字类型 unsigned long red = strtoul([str UTF8String], 0 , 16 ); //strtoul如果传入的字符开头是“0x”,那么第三个参数是0，也是会转为十六进制的,这样写也可以： unsigned long red =

使用代码自动创建模型属性

由 回眸只為那壹抹淺笑 提交于 2020-01-15 04:02:41
每次Model中有很多的属性，写起来很费劲！这篇文章将实现一句话创建Model中的所有属性代码，输出到控制台！！！ NSObject+Property.h #import <Foundation/Foundation.h> @interface NSObject (Property) + (void)createPropertyCodeWithDictionary:(NSDictionary *)dictionary; @end NSObject+Property.m #import "NSObject+Property.h" @implementation NSObject (Property) + (void)createPropertyCodeWithDictionary:(NSDictionary *)dictionary { NSMutableString *strM = [NSMutableString string]; // 遍历字典 [dictionary enumerateKeysAndObjectsUsingBlock:^(id _Nonnull propertyName, id _Nonnull value, BOOL * _Nonnull stop) { // NSLog(@"%@ %@",propertyName,[value class]);

Way to draw NSString on a curved path?

由 喜夏-厌秋 提交于 2020-01-14 09:04:22
问题 I have been looking for any example code for drawing a UILabel (or just an NSString or something) on a curved path, but have come up empty handed. Does anyone know whether it's possible to draw text on a curved path, like a circle or something, without using separate pieces of graphics for every single letter? 回答1: Split the String into letters and then so something like this: How do I draw an NSString at an angle? increasing the angle and changing the position after every letter. 来源： https:/

Way to draw NSString on a curved path?

由 匆匆过客 提交于 2020-01-14 09:04:04
问题 I have been looking for any example code for drawing a UILabel (or just an NSString or something) on a curved path, but have come up empty handed. Does anyone know whether it's possible to draw text on a curved path, like a circle or something, without using separate pieces of graphics for every single letter? 回答1: Split the String into letters and then so something like this: How do I draw an NSString at an angle? increasing the angle and changing the position after every letter. 来源： https:/

How to escape an NSString to use in NSURL? [closed]

由 与世无争的帅哥 提交于 2020-01-14 07:28:32
问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . Got this code so far for my send button: NSString* urlString = [NSString stringWithFormat:@"http://server.com/ios/add.php?user=iPhone+App&message=%@", messageBox.text stringByAddingPercentEscapesUsingEncoding :

iOS网络请求 添加全局代理 NSURLSessionConfiguration 解决方案

由 拥有回忆 提交于 2020-01-13 18:10:11
1、最近做项目、文件存储服务器是用的亚马逊的、如果直接访问、下载其资源速度很慢、所以需要在网络请求的时候添加一个代理、加速网络访问 2、代理服务器是一个HTTPS 的一个服务器 3、思路、解决方案、利用运行时机制(添加分类NSURLSession+Change)针对 NSURLSession 初始化添加代理对所有的网络请求进行拦截处理 #import "NSURLSession+Change.h" @implementation NSURLSession (Change) +(void)load{ Method oldMethod = class_getClassMethod(self, @selector(sessionWithConfiguration:delegate:delegateQueue:)); Method newMethod = class_getClassMethod(self, @selector(newSessionWithConfiguration:delegate:NSURLSessiondelegateQueue:)); Method oldMethod1 = class_getClassMethod(self, @selector(sessionWithConfiguration:)); Method newMethod1 = class

What is the difference between these two ways of creating NSStrings?

由 风流意气都作罢 提交于 2020-01-13 17:12:12
问题 NSString *myString = @"Hello"; NSString *myString = [NSString stringWithString:@"Hello"]; I understand that using method (1) creates a pointer to a string literal that is defined as static memory (and cannot be deallocated) and that using (2) creates an NSString object that will be autoreleased. Is using method (1) bad? What are the major differences? Is there any instances where you would want to use (1)? Is there a performance difference? P.S. I have searched extensively on Stack Overflow

What is the difference between these two ways of creating NSStrings?

由 独自空忆成欢 提交于 2020-01-13 17:11:25
问题 NSString *myString = @"Hello"; NSString *myString = [NSString stringWithString:@"Hello"]; I understand that using method (1) creates a pointer to a string literal that is defined as static memory (and cannot be deallocated) and that using (2) creates an NSString object that will be autoreleased. Is using method (1) bad? What are the major differences? Is there any instances where you would want to use (1)? Is there a performance difference? P.S. I have searched extensively on Stack Overflow
订阅 nsstring