//第一種，利用數(shù)組的sortedArrayUsingComparator調(diào)用 NSComparator 刹勃，obj1和obj2指的數(shù)組中的對象

NSComparator cmptr = ^(id obj1, id obj2){
 if ([obj1 integerValue] > [obj2 integerValue]) {
        return (NSComparisonResult)NSOrderedDescending;
    }
 
    if ([obj1 integerValue] < [obj2 integerValue]) {
        return (NSComparisonResult)NSOrderedAscending;
    }
    return (NSComparisonResult)NSOrderedSame;
};
NSArray *sortArray = [[NSArray alloc] initWithObjects:@"1",@"3",@"4",@"7",@"8",@"2",@"6",@"5",@"13",@"15",@"12",@"20",@"28",@"",nil];
 //排序前
 NSMutableString *outputBefore = [[NSMutableString alloc] init];
 for(NSString *str in sortArray){
  [outputBefore appendFormat:@"];
 }
 NSLog(@"排序前:%@",outputBefore);
 //第一種排序
 NSArray *array = [sortArray sortedArrayUsingComparator:cmptr];
 
 NSMutableString *outputAfter = [[NSMutableString alloc] init];
 for(NSString *str in array){
  [outputAfter appendFormat:@"];
 }
 NSLog(@"排序后:%@",outputAfter);

第二種 排序方法 利用sortedArrayUsingFunction 調(diào)用 對應(yīng)方法customSort膘融，這個方法中的obj1和obj2分別是指數(shù)組中的對象。

NSInteger customSort(id obj1, id obj2,void* context){
 if ([obj1 integerValue] > [obj2 integerValue]) {
        return (NSComparisonResult)NSOrderedDescending;
    }
 
    if ([obj1 integerValue] < [obj2 integerValue]) {
        return (NSComparisonResult)NSOrderedAscending;
    }
    return (NSComparisonResult)NSOrderedSame;
}
 NSArray *sortArray = [[NSArray alloc] initWithObjects:@"1",@"3",@"4",@"7",@"8",@"2",@"6",@"5",@"13",@"15",@"12",@"20",@"28",@"",nil];
 //排序前
 NSMutableString *outputBefore = [[NSMutableString alloc] init];
 for(NSString *str in sortArray){
  [outputBefore appendFormat:@"];
 }
 NSLog(@"排序前:%@",outputBefore);
 
 NSArray *array = [sortArray sortedArrayUsingFunction:customSort context:nil];
 NSMutableString *outputAfter = [[NSMutableString alloc] init];
 for(NSString *str in array){
  [outputAfter appendFormat:@"];
 }
 NSLog(@"排序后:%@",outputAfter);

第三種 利用sortUsingDescriptors調(diào)用NSSortDescriptor
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"price" ascending:NO];//其中岖寞，price為數(shù)組中的對象的屬性纽帖，這個針對數(shù)組中存放對象比較更簡潔方便

  NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:&sortDescriptor count:1];
  [_totalInfoArray sortUsingDescriptors:sortDescriptors];
  [_airListView refreshTable:_totalInfoArray];

 NSString *s1 = @"sdf";
        NSArray  *arr1 = @[@"1",@"2"];
        NSDictionary *dict1 = @{@"1":@"a",@"2":@"b"};
        NSMutableArray *arr2 = @[@"1",@"2"].mutableCopy;
        NSMutableDictionary *dict2  = @{@"a":@"1",@"b":@"2"}.mutableCopy;
        // 如果想使用字面量初始化數(shù)組或者字典闯狱，可以是使用.mutablecopy即可