Article 16th: Foundation Framework exercises in OC, ocfoundation

Article 16th: Foundation Framework exercises in OC, ocfoundation

Foundation frame learning to push the blog: http://blog.csdn.net/jianxin160/article/details/47753195#array

// Fundation # import <Foundation/Foundation. h> // 14. Custom a Ball class with a color attribute (only black and white ). Typedef enum _ BallColor {BallColorRed, BallColorBlack,} BallColor; @ interface Ball: NSObject @ property (nonatomic, assign) BallColor color; + (Ball *) ball; + (Ball *) ballWithColor :( BallColor) color; @ end @ implementation Ball + (Ball *) ball {Ball * bb = [[Ball alloc] init]; NSInteger rand = arc4random () % 2; if (BallColorBlack = rand) {bb. color = BallColorBlack;} else bb. color = BallColorRed; return bb;} + (Ball *) ballWithColor :( BallColor) color {Ball * p = [self ball]; p. color = color; return p;}-(NSString *) description {NSString * color1; color1 = nil; if (BallColorRed = _ color) {color1 = @ "red ";} else color1 = @ "black"; return [NSString stringWithFormat: @ "the current color is: % @", color1];} @ end ////////////////////////////////////// //////////////////////////////////////// ///////////////// // filter the numbers in str, and returns # pra Gma mark-filter the numbers in str and return NSString * stringWithoutNum (NSString * str) {NSMutableString * mutStr = [NSMutableString stringWithString: str]; for (int I = 0; I <10; I ++) {[mutStr replaceOccurrencesOfString: [NSString stringWithFormat: @ "% d", I] withString: @ "" options: NSLiteralSearch range: NSMakeRange (0, mutStr. length)];} return mutStr;} // convert num to a string # pragma mark-convert num to a string NSString * castToStr (NSInteger nu M) {return [NSString stringWithFormat: @ "% ld", num];} // input an array. The returned array contains 10 elements. # pragma mark-input an array and return an array with 10 elements not contained. NSArray * kickOffEven (NSArray * array) {NSMutableArray * mutArr = [NSMutableArray arrayWithArray: array]; for (int I = (int) mutArr. count-1; I> = 0; -- I) {if (10 = [mutArr [I] integerValue]) [mutArr removeObjectAtIndex :( NSUInteger) I];} return mutArr ;} int main (int argc, const char * arg V []) {@ autoreleasepool {// 1. the following string is defined: NSString * str = @ "iphoneAndroid". Can this string be modified? If yes, output the new string after Android deletion. NSMutableString * str = [NSMutableString stringWithString: @ "iphoneAndroid"]; NSString * delstr = @ "Android"; nsange range = [str rangeOfString: delstr]; NSLog (@ "% @", [str substringToIndex: range. location]); // 2. evaluate the difference between the string "158" and "39" by decimal value and output NSInteger mins = [@ "158" integerValue]-[@ "39" integerValue] in the form of a string; NSLog (@ "% ld", mins); // 3. extract the numbers in the string "123-456-789-000" to form a new string and output NSMutableString * str1 = [NSMutableString stringWithString: @ "123-456-789-000"]; [str1 replaceOccurrencesOfString: @ "-" withString: @ "" options: NSLiteralSearch range: NSMakeRange (0, str1.length)]; NSLog (@ "% @", str1); // 4. implementation function NSString * stringWithoutNum (NSString * str); NSLog (@ "% @", stringWithoutNum (@ "abc123defg22aaAA"); // 5. NSString * castToStr (NSInteger int); function NSLog (@ "% @", castToStr (123466); // 6. define an array tens containing 10 integer elements. NSArray * tens = @ [@ 1, @ 2, @ 3, @ 4, @ 10, @ 6, @ 7, @ 8, @ 9, @ 10]; // NSLog (@ "% @", tens); // 7. implementation function: NSArray * kickOff10 (NSArray * array) NSArray * tTens = [NSArray arrayWithArray: tens]; tTens = kickOffEven (tTens); NSLog (@ "% @", tTens ); // 8. define an array to store the Student name and store the five student names. NSArray * arrName = [[NSArray alloc] init]; for (int I = 1; I <= 5; I ++) {// [mutarr addObject:]; arrName = [arrName arrayByAddingObject: [NSString stringWithFormat: @ "name % d", I];} /* You can also install 6th to initialize the array */NSLog (@ "8th outputs: % @", arrName); // 9. save the Student name array to a file. NSString * url = @ "/Users/qujie/Desktop/1.txt"; [arrName writeToFile: url atomically: YES]; // 10. Read the file and output the content. ArrName = nil; arrName = [NSArray arrayWithContentsOfFile: url]; NSLog (@ "10th outputs: % @", arrName); // 11. store student information (name, age, and gender) in a dictionary ). NSDictionary * sutInformation ={ @ "name": @ "name_xx", @ "age": @ "20", @ "sex": @ "man "}; NSLog (@ "11th outputs: % @", sutInformation); // 12. generate 3 student information and store it in an array. NSMutableArray * susuinfoarr = [NSMutableArray array]; for (int I = 0; I <3; ++ I) {NSDictionary * sutInformation ={ @ "name": [NSString stringWithFormat: @ "name _ % d", I], @ "age": @ "20", @ "sex": @ "man"}; [susuinfoarr addObject: sutInformation];} NSLog (@ "12th outputs: % @", sutInfoArr); // 13. output array. // 14. Customize a Ball class with a color attribute (only black and white ). Ball * ball = [Ball ballWithColor: BallColorBlack]; NSLog (@ "14th problem output: % @", ball); // 15. generate 20 balls randomly and place them in a collection. NSMutableSet * ballSet = [NSMutableSet setWithCapacity: 20]; for (int I = 0; I <20; I ++) {[ballSet addObject: [Ball ball];} // 16. extract 10 small balls from the set and print them out. NSMutableArray * ballMut = [NSMutableArray arrayWithCapacity: 10]; for (int I = 0; I <10; I ++) {Ball * B = [ballSet anyObject]; [ballSet removeObject: b]; [ballMut addObject: B];} NSLog (@ "16th outputs: % @", ballMut); // 17. convert May 05, 2013 to NSDateFormatter * formatter = [[NSDateFormatter alloc] init]; formatter. dateFormat = @ "MM dd, yyyy"; NSDate * date = [formatter dateFromString: @ "July May 05, 2013" ]; NSDateFormatter * formatter2 = [[NSDateFormatter alloc] init]; formatter2.dateFormat = @ "yyyy-MM-dd"; NSString * dateString = [formatter2 stringFromDate: date]; NSLog (@ "% @ converted to % @", date, dateString); // 18. use @ "Ball" to create a Car instance ([[Ball alloc] init] cannot be used) Class class = NSClassFromString (@ "Ball "); ball * Car = [[class alloc] init]; NSLog (@ "% @", Car); // 19. compile a guess digital game.} Return 0 ;}

Copyright Disclaimer: This article is an original article by the blogger and cannot be reproduced without the permission of the blogger.