iOS 对字符串进行ASCII码排序

p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 16.0px Menlo; color: #ffffff; background-color: #000000 }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 16.0px Menlo; color: #00b1ff; background-color: #000000 }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 16.0px Menlo; color: #ffffff; background-color: #000000; min-height: 19.0px }
span.s1 { color: #00b1ff }
span.s2 { color: #ff4647 }
span.s3 { color: #08fa95 }
span.s4 { color: #ffffff }
span.s5 { color: #de38a5 }
span.s6 { color: #8b87ff }

NSString *signValue = [NSString stringWithFormat:@"%@%@", valueJson, [Utility getCurrentTimes]];

NSMutableString * getSignString = [NSMutableString string];

NSMutableArray * mutaArray = [NSMutableArray array];

for (int i = 0; i < [signValue length]; i ++) {

[mutaArray addObject:[signValue substringWithRange:NSMakeRange(i, 1)]];

}

NSStringCompareOptions comparisonOptions = NSCaseInsensitiveSearch|NSNumericSearch|

NSWidthInsensitiveSearch|NSForcedOrderingSearch;

NSComparator sort = ^(NSString *obj1,NSString *obj2){

NSRange range = NSMakeRange(0,obj1.length);

return [obj1 compare:obj2 options:comparisonOptions range:range];

};

NSArray *resultArray2 = [mutaArray sortedArrayUsingComparator:sort];

for (NSString * oldString in resultArray2) {

[getSignString appendString:oldString];

}

//signValue为输入字符串， getSignString为最后得到字符串

原文地址：https://www.cnblogs.com/allenwuhen/p/9680476.html