NSArray to NSString

从字符串分割到数组－ componentsSeparatedByString: NSString *string = [[NSString alloc] initWithString:@"One,Two,Three,Four"]; NSLog(@"string:%@",string);
 NSArray *array = [string componentsSeparatedByString:@","];
 NSLog(@"array:%@",array); [string release]; 結果呈現 2012-06-15 17:10:34.028 Hotairballoon[546:707] string:One,Two,Three,Four 2012-06-15 17:10:34.029 Hotairballoon[546:707] array:( One, Two, Three, Four ) 从数组合并元素到字符串- componentsJoinedByString: NSArray *array = [[NSArray alloc] initWithObjects:@"One",@"Two",@"Three",@"Four",nil]; NSString *string = [array componentsJoinedByString:@","];
 NSLog(@"string:%@",string); 結果呈現 2012-06-15 17:16:57.596 Hotairballoon[565:707] string:One,Two,Three,Four