iphone - Block input variables question
I am trying to understand how string1/string2 in the block are being fed input values from stringsArray in this code snippet. i don't see a place where these values are pointing to strngsArray. here is the code -
NSArray *stringsArray = [NSArray arrayWithObjects:
@"string 1",
@"String 21",
@"string 12",
@"String 11",
@"String 02", nil];
static NSStringCompareOptions comparisonOptions = NSCaseInsensitiveSearch | NSNumericSearch |
NSWidthInsensitiveSearch | NSForcedOrderingSearch;
NSLocale *currentLocale = [NSLocale currentLocale];
NSComparator finderSortBlock = ^(id string1, id string2) {
NSRange string1Range = 开发者_运维知识库NSMakeRange(0, [string1 length]);
return [string1 compare:string2 options:comparisonOptions range:string1Range locale:currentLocale];
};
NSArray *finderSortArray = [stringsArray sortedArrayUsingComparator:finderSortBlock];
NSLog(@"finderSortArray: %@", finderSortArray);
/*
Output:
finderSortArray: (
"string 1",
"String 02",
"String 11",
"string 12",
"String 21"
)
*/
The array will feed the objects it contains to the block one after another to determine the order.
精彩评论