iOS - 目標C，通過鍵名對NSDictionary的NSArray進行排序

Question

如何根據NSDictionary的鍵名對NSArray的字典進行排序。

可以說，NSArray中的JSON格式

[ 
{ 
    "keyName" : "C", 
    "value" : "0.1" 
}, 
{ 
    "keyName" : "A", 
    "value" : "1.1" 
}, 
{ 
    "keyName" : "B", 
    "value" : "2.1" 
} 
] 

Answer 1

排序中的iOS字典的數組是很容易簡單NSSortDescriptor做演練。

[yourArray sortUsingDescriptors:[NSArray arrayWithObjects:[NSSortDescriptor sortDescriptorWithKey:@"keyName" ascending:YES], nil]]; 

Answer 2

您可以使用sortedArrayUsingComparator

NSArray *sortedArray; 
sortedArray = [unsortedArray sortedArrayUsingComparator:^NSComparisonResult(id a, id b) { 
Dictionary *dictoinary1 = (Dictionary*)a; 
Dictionary * dictoinary2 = (Dictionary*)b; 
return [[dictoinary1 objectForKey:@"keyName"] caseInsensitiveCompare:[dictoinary2 objectForKey:@"keyName"]]; 
}];