【无限互联】iOS开发视频教程课件第四章Foundation框架源代码

// // main.m // FoundationDemo1 // // Created by 周泉 on 12-9-28. // Copyright (c) 2012年 www.iphonetrain.com 无限互联ios开发培训中心. All rights reserved. // #import <Foundation/Foundation.h> int main(int argc, const char * argv[]) { @autoreleasepool { /*___________________ NSNumber ___________________*/ // 数字对象的创建 /* NSNumber *monthNumber = [NSNumber numberWithInt:10]; NSNumber *lengthNumber = [[NSNumber alloc] initWithFloat:10.8]; NSLog(@"monthNumber : %@", monthNumber); NSLog(@"lengthNumber : %@", lengthNumber); // 还原成基本数据类型 int month = [monthNumber intValue]; float length = [lengthNumber floatValue]; NSLog(@"month : %d", month); NSLog(@"length : %.1f", length); */ /*___________________ NSString ___________________*/ // 字符串对象的创建 /* // 创建一个字符串常量 NSString *string1 = @"这是一个字符串常量"; NSLog(@"string1 : %@", string1); // 创建一个空的字符串 NSString *string2 = [[NSString alloc] init]; NSString *string3 = [NSString string]; NSLog(@"string2 : %@", string2); NSLog(@"string3 : %@", string3); // 快速创建一个字符串 常量区(NSString) NSString *string4 = [[NSString alloc] initWithString:@"abc"]; NSString *string5 = [NSString stringWithString:@"abc"]; NSLog(@"string4 : %@", string4); NSLog(@"string5 : %@", string5); // 创建一个格式化的字符串 堆区 NSString *string6 = [[NSString alloc] initWithFormat:@"整数：%d", 10]; NSString *string7 = [NSString stringWithFormat:@"浮点数：%f", 10.8]; NSLog(@"string6 : %@", string6); NSLog(@"string7 : %@", string7); // 字符串的比较 NSString *string8 = [NSString stringWithFormat:@"123"]; NSString *string9 = [NSString stringWithFormat:@"123"]; if ([string8 isEqualToString:string9]) { NSLog(@"same content"); }else { NSLog(@"different content"); } // 比较字符串的内容 if (string8 == string9) { NSLog(@"same pointer"); }else { NSLog(@"different pointer"); } // 比较是否为同一个对象 // 比较字符串的大小 NSString *string10 = [[NSString alloc] initWithFormat:@"z"]; NSString *string11 = [[NSString alloc] initWithFormat:@"abcd"]; NSComparisonResult result = [string10 caseInsensitiveCompare:string11]; NSLog(@"result : %d", result); // 求字符串的长度 NSLog(@"%d", [string11 length]); // 字符串的转换 NSString *string12 = @"Hello wOrld"; NSLog(@"upper : %@", [string12 uppercaseString]); NSLog(@"lower : %@", [string12 lowercaseString]); NSLog(@"capital : %@", [string12 capitalizedString]); // 转换成基本数据类型 NSString *string13 = @"3.14"; float pi = [string13 floatValue]; NSLog(@"pi : %.2f", pi); // 字符串转换成数组 NSString *string14 = @"abc bcd xyz"; NSArray *array = [string14 componentsSeparatedByString:@" "]; NSLog(@"array : %@", array); // 截取字符串 NSString *string15 = @"abcdefg"; NSString *subString1 = [string15 substringToIndex:2]; NSString *subString2 = [string15 substringFromIndex:2]; NSLog(@"subString1 : %@", subString1); NSLog(@"subString2 : %@", subString2); NSRange range = {4, 2}; NSString *subString3 = [string15 substringWithRange:range]; NSLog(@"subString3 : %@", subString3); // 字符串的拼接 NSString *string16 = @"abc"; NSString *string17 = @"xyz"; NSString *appString1 = [[NSString alloc] initWithFormat:@"%@%@", string16, string17]; NSString *appString2 = [string16 stringByAppendingFormat:@"%@", string17]; NSString *appString3 = [string16 stringByAppendingString:string17]; NSLog(@"appString 1 : %@", appString1); NSLog(@"appString 2 : %@", appString2); NSLog(@"appString 3 : %@", appString3); // 查找字符串 NSString *link = @"abcdeftarget=_blankxyz"; NSRange range1 = [link rangeOfString:@"target=_blank"]; if (range1.location != NSNotFound) { NSLog(@"founded"); } //////////////////////////////////////////////////////////// NSMutableString *mutableString1 = [[NSMutableString alloc] initWithFormat:@"abc"]; // 插入一个字符串 [mutableString1 insertString:@"...xyz" atIndex:3]; NSLog(@"mutalbeString1 : %@", mutableString1); // 替换 [mutableString1 replaceCharactersInRange:NSMakeRange(0, 3) withString:@"efg"]; NSLog(@"mutalbeString1 : %@", mutableString1); // 删除 [mutableString1 deleteCharactersInRange:NSMakeRange(0, 3)]; NSLog(@"mutalbeString1 : %@", mutableString1); */ /*___________________ NSArray ___________________*/ // 数组对象的创建 /* NSArray *array1 = [NSArray arrayWithObject:@"One"]; NSArray *array2 = [NSArray arrayWithObjects:@"One", @"Two", nil]; NSArray *array3 = [NSArray arrayWithArray:array2]; NSLog(@"array1 : %@", array1); NSLog(@"array2 : %@", array2); NSLog(@"array3 : %@", array3); NSArray *array4 = [[NSArray alloc] initWithArray:array1]; NSLog(@"array4 : %@", array4); // 获取数组中的元素个数和访问 int count = [array2 count]; NSLog(@"array2 all element :%d", count); NSString *string1 = [array2 objectAtIndex:1]; NSLog(@"element of array: %@", string1); // 追加数组中的内容 NSArray *array5 = [array2 arrayByAddingObject:@"end"]; NSLog(@"array5 : %@", array5); // 数组->字符串 NSString *string2 = [array5 componentsJoinedByString:@","]; NSLog(@"stirng2 : %@", string2); // 判断数组中是否存在一个指定的对象 BOOL isContain = [array5 containsObject:@"end1"]; NSLog(@"isContain : %d", isContain); // 根据指定的对象返回索引下标、返回数组中最后一个元素 NSInteger index = [array5 indexOfObject:@"end"]; NSLog(@"index : %d", index); NSString *lastObject = [array5 lastObject]; NSLog(@"last Object : %@", lastObject); ///////////////////////////////////////////////////////// // 创建了一个空的数组 NSMutableArray *mutableArray1 = [NSMutableArray arrayWithObjects:@"One", @"Two", @"end", @"Five", nil]; // 新增、插入、删除、替换 NSLog(@"mutableArray1 : %@", mutableArray1); [mutableArray1 addObject:@"Four"]; NSLog(@"mutableArray1 : %@", mutableArray1); [mutableArray1 insertObject:@"Three" atIndex:2]; NSLog(@"mutableArray1 : %@", mutableArray1); [mutableArray1 removeLastObject]; NSLog(@"removeLastObject : %@", mutableArray1); [mutableArray1 removeObject:@"end"]; NSLog(@"removeObject : %@", mutableArray1); [mutableArray1 removeObjectAtIndex:3]; NSLog(@"removeObjectAtIndex : %@", mutableArray1); [mutableArray1 addObject:@"Four"]; NSLog(@"add four: %@", mutableArray1); NSArray *deleteArray = [NSArray arrayWithObjects:@"One", @"Two", nil]; [mutableArray1 removeObjectsInArray:deleteArray]; NSLog(@"removeObjectsInArray: %@", mutableArray1); [mutableArray1 replaceObjectAtIndex:0 withObject:@"3"];