ios - iOS应用中的排序数组问题

Question

我有一个像这样的数组:

(
“8461.86”，“8468.22”，“8468.22”，“8162.59”，“8164.50”，“7280.59”)

我尝试按照以下顺序递减排序此数组:

sortedArray = [arr_distance sortedArrayUsingComparator:^(id firstObject, id secondObject) {
    return [((NSString *)firstObject) compare:((NSString *)secondObject) options:NSNumericSearch];
}];

但是我得到如下数组:

(
“7280.59”，“8162.59”，“8164.50”，“8461.86”，“8468.22”，“8468.22”)

为什么会这样？

我也喜欢

return [firstObject compare:secondObject options:NSNumericSearch];

但是没有得到正确的排序数组。

Answer 1

NSSortDescriptor *desc = [[NSSortDescriptor alloc]initWithKey:@"" ascending:NO];
NSMutableArray *yourTempArray = [[NSMutableArray alloc]initWithObjects:@"8459.93",@"8466.28",@"8466.28",@"8160.70",@"8162.61",@"7278.56", nil];
[yourTempArray sortUsingDescriptors:[NSArray arrayWithObject:desc]];
NSLog(@"sotedAr == %@",yourTempArray);

输出:

sotedAr == (
"8466.28",
"8466.28",
"8459.93",
"8162.61",
"8160.70",
"7278.56"

)