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int
main(int
argc, const
char * argv[]){ @autoreleasepool
{ NSString
*outputString = @"1234567890!@#$%^&*()"; NSMutableString
*resultString = [[NSMutableString
alloc] init]; NSLog(@"%d", (int)outputString.length); for(int
j=0;j<outputString.length;j++) { NSLog(@"Index = %d Char = %@",j, [outputString substringWithRange:NSMakeRange(j, 1)]); } for(int
i=0;i<20;i++) { int
index = arc4random() % outputString.length; NSString
*indexString = [outputString substringWithRange:NSMakeRange(index, 1)]; [resultString appendFormat:@"%d %@ ", index, indexString]; } if
(resultString) { NSLog(@"%@", resultString); } return
0; }} |
Objective C －2 - 随机数，可变字符串，字符串，SubString,布布扣,bubuko.com
Objective C －2 - 随机数，可变字符串，字符串，SubString
原文：http://www.cnblogs.com/sskset/p/3756225.html