NSString 基础练习:
代码:
//
// main.m
// NSStringDemo01
//
// Created by Levi on 14-3-14.
// Copyright (c) 2014年 levi. All rights reserved.
// #import <Foundation/Foundation.h> int main(int argc, const char * argv[])
{ @autoreleasepool { /*
NSString
NSArray
NSDictionary
*/
char *s = "Hello World";
NSString *str1 = @"Hello World";
NSLog(@"s is %s str1 is %@", s, str1); //NSString *str3 = [[NSString alloc] initWithString:@"Hello World"];
/* c 类型字符串转化成 oc NSString */
NSString *str2 = [[NSString alloc] initWithCString:s encoding:NSUTF8StringEncoding];
const char *p = [str2 UTF8String];
NSLog(@"str2 is %@ p is %s", str2, p); NSString *str3 = [NSString stringWithFormat:@"%s%d%c%f", "sss", 10, 'c', 3.14];
NSLog(@"str3 is %@", str3); NSString *str4 = @"10";
int a = str4.intValue;
NSLog(@"a is %d", a);
NSLog(@"strlen is %ld", str3.length); NSString *str5 = @"wahaha";
NSString *str6 = @"wahaha";
NSLog(@"cmp : %d", [str5 isEqualToString:str6]); NSString *s1 = @"My name is";
NSString *s2 = @"Levi";
NSString *s3 = @"I am 24";
NSString *s4 = [NSString stringWithFormat:@"%@ %@ %@", s1, s2, s3];
NSLog(@"%@", s4); NSString *s5 = @"145";
NSString *s6 = @"151";
int result = [s5 compare:s6];
NSString *s7 = @"NSOoerdefadfLeviadlfkj, usidfja, dfdfddl";
NSRange range = [s7 rangeOfString:@"td"];
/* 判断条件 */
NSLog(@"NSNotFount is %ld", NSNotFound); if(range.location == NSNotFound && range.length == 0)
NSLog(@"NO found!");
else NSLog(@"location is %ld length is %ld", range.location, range.length);
NSString *s8 = @"Welcome to Bejing";
NSRange range2 = {3, 6};
NSString *s9 = [s8 substringWithRange: range2];
NSLog(@"%@", s9); NSString *s10 = [s8 substringFromIndex:s8.length-6];
NSLog(@"%@", s10); NSString *s11 = @"When I was young, I loved a girl on neighbor class.";
NSRange range3 = [s11 rangeOfString:@"was"];
NSRange range4 = [s11 rangeOfString:@"girl"];
NSRange range5;
range5.length = range4.location - range3.location + range4.length;
range5.location = range3.location;
NSString *s12 = [s11 substringWithRange:range5];
NSLog(@"%@", s12); NSString *s13 = @"Welcome to Qianfeng";
NSRange range6 = [s13 rangeOfString:@"to"];
NSString *s15 = [s13 substringToIndex:range6.location-1];
NSString *s16 = [s13 substringFromIndex:range6.location+range6.length];
NSString *s14 = [NSString stringWithFormat:@"%@%@", s15, s16];
NSLog(@"%@", s14); NSString *s17 = @"Hello world";
NSRange range7 = [s17 rangeOfString:@"Hello"];
NSRange range8 = [s17 rangeOfString:@"world"];
NSString *s19 = [s17 substringWithRange:range7];
NSString *s20 = @"qianfeng";
NSString *s21 = [s17 substringWithRange:range8];
NSString *s18 = [NSString stringWithFormat:@"%@ %@ %@", s19, s20, s21];
NSLog(@"%@", s18); NSString *s22 = @"When I was young, I loved a girl on neighbor class. ";
NSRange range9 = [s22 rangeOfString:@"young"];
NSRange range10 = [s22 rangeOfString:@"girl"];
NSString *s23 = [s22 substringToIndex:range9.location];
NSString *s24 = [s22 substringFromIndex:range10.location+range10.length];
NSString *s25 = @"teacher, I rather teaching the students";
NSString *s26 = [NSString stringWithFormat:@"%@%@%@", s23,s25,s24];
NSLog(@"%@", s26);
}
return 0;
}