ios-過濾NSMutableArray的結果

過濾NSMutableArray的結果

NSMutableArray如下：

(
        {
        City = "Orlando";
       Name = "Shoreline Dental";
        State = Florida;
    },
        {
        City = "Alabaster ";
        Name = Oxford Multispeciality;
        State = Alabama;
    },
        {
        City = Dallas;
        Name = "Williams Spa";
        State = Texas;
    },
        {
        City = "Orlando ";
        Name = "Roast Street";
        State = Florida;
    }
)

怎麼實現根據state"FLorida"對NSMutableArray進行分組:

(
        {
        City = "Orlando";
       Name = "Shoreline Dental";
        State = Florida;
    },
 {
        City = "Orlando ";
        Name = "Roast Street";
        State = Florida;
    }
)

代碼還是現實先前的四個dictionary。

NSSortDescriptor *valueDescriptor = [[NSSortDescriptor alloc] initWithKey:@"Florida" ascending:YES];
       NSArray * descriptors = [NSArray arrayWithObject:valueDescriptor];
        NSArray * sortedArray = [arr sortedArrayUsingDescriptors:descriptors];

.

最佳回答：

如果是排序的話，你可以用NSSortDescriptor.
但你想要的是，根據state="FLorida"來過濾，你可以嘗試使用NSPredicate來過濾NSMutableArray 中的數據並返回結果。