结构体类型定义： struct Date = { int year; int month; int day; }; struct Date d = {2013,8,17}; d.day = 6; 或者 typedef struct Date = { int year; int month; int day; } Da

main.m // // main.m // NSArraySort // // Created by Rayln Guan on 9/4/13. // Copyright (c) 2013 Rayln Guan. All rights reserved. // #import #import "Student.h" void arraySort1(){

NSNull是为了解决字典等各种类不能放null而用的，这个对象可以放入字典中 NSNull *n = [NSNull null]; 就这么简单

NSLog(@"大写：%@", [str uppercaseString]); NSLog(@"小写: %@", [str lowercaseString]); NSLog(@"首字母大写, 其他字母变小写", [@"aGe", capitalizedString]); BOOL result = [@"abc" isEqualToString:@"Abc"]; //返回0, 即为fa

// // main.m // NSNumber // // Created by rayln on 13-9-7. // Copyright (c) 2013年 rayln. All rights reserved. // #import int main(int argc, const char * argv[]) { @autorelease

void test(){ NSString *str = @"123456"; NSString *path = @"/User/Desktop/text.txt"; NSError *error; //atomically: yes是创造一个临时文件，写入到临时文件后再拷贝到目标文件。 //atomically: no是直接拷贝到目标文件

- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ UITouch *touch = [touches anyObject]; CGPoint p1 = [touch locationInView:nil]; //p1.y = 480-p1.y; CGPoint p3 = [

新建一个cocos2d-chipmunk项目 首先AppDelegate.m中加入 - (void)applicationDidFinishLaunching:(UIApplication *)application{ cpInitChipmunk(); } 初始化！！ 然后添加类 TestWorld.h // // TestWorld.h // TestPiking //

// // main.m // NSValue // // Created by Rayln Guan on 9/9/13. // Copyright (c) 2013 Rayln Guan. All rights reserved. // #import void value1(){ //point是结构体。没办法直接放入array当中，这时候我们需要

main.m // // main.m // NSArray // // Created by Rayln Guan on 9/4/13. // Copyright (c) 2013 Rayln Guan. All rights reserved. // #import #import "Student.h" int main(int argc, const c

NSString *path = @"/User/desktop/text.txt"; //可解析中文 NSString *str = [NSString stringWithContentOfFile:path encoding:NSUTF8StringEncoding error:nil]; //如果解析gbk中文，需要用enc

main.m // // main.m // Block1 // // Created by Rayln Guan on 8/30/13. // Copyright (c) 2013 Rayln Guan. All rights reserved. // #import #import "Button.h" int main(int argc, const ch

在.m文件中加入 #ifdef _FOR_DEBUG_ -(BOOL) respondsToSelector:(SEL)aSelector { printf("SELECTOR: %s\n", [NSStringFromSelector(aSelector) UTF8String]); return [super respondsToSelector:aSelector];

NSArray NSMutableArray copy NSArrayNSArray NSMutableArray mutableCopy NSMutableArrayNSDictionary NSMutableDictionary copy NSDictionaryNSMutableDictionary NSDictionary mutableCopy NSMutableDictionary

// // main.m // Refect // // Created by Rayln Guan on 9/13/13. // Copyright (c) 2013 Rayln Guan. All rights reserved. // #import #import "Student.h" #import "Person.h" int main(int

// // main.m // NSMutableArray // // Created by rayln on 13-9-7. // Copyright (c) 2013年 rayln. All rights reserved. // #import int main(int argc, const char * argv[]) { @autor

NSString *str = [[NSString alloc] initWithUTF8String: "123456"]; [str release]; 或者 //不用释放内存 NSString *str = [NSString stringWithFormat:@"i has %i and %.2f", 19, 1.223f]; initWithUTF8String

字典相当于Java中的Map， 有key和value // // main.m // NSDictionary // // Created by rayln on 13-9-6. // Copyright (c) 2013年 rayln. All rights reserved. // #import int main(int argc, const char