This might work:
NSArray * sortedKeys = [[dict allKeys] sortedArrayUsingSelector: @selector(caseInsensitiveCompare:)];
NSArray * objects = [dict objectsForKeys: sortedKeys notFoundMarker: [NSNull null]];
or in Swift
let objects = dict.keys.sorted().flatMap{ dict[$0] }
or
let objects = dict.sorted{ $0.0 < $1.0 }.map{ $1 }
…and that is why you should start developing in Swift ??
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…