小编Liv*_*oy7的帖子

我试图在iOS7中自定义导航控制器的navigationBar,标题颜色不会改变.我正在做以下事情:

    [navigationController.navigationBar setBarTintColor:[UIColor colorWithRed:46.0f/256.0f green:46.0f/256.0f blue:46.0f/256.0f alpha:1]];
    [navigationController.navigationBar setTranslucent:NO];
    [navigationController.navigationBar setTitleTextAttributes:@{[UIColor whiteColor]:UITextAttributeTextColor}];
    [self presentViewController:navigationController animated:YES completion:nil];

navigationBar半透明关闭并且很暗,但标题也保持黑暗.我也尝试创建一个自定义标签,并将其设置为标题视图,运气不佳.

如何更改标题颜色？

在这里使用基本目标c示例,尝试使用replaceObjectAtIndex作为数组,它似乎不起作用.

我的代码:

 NSMutableArray *myArray=[NSMutableArray array];
    [myArray addObject:@"First string"];
    [myArray addObject:@"Second string"];
    [myArray addObject:@"Third string"];

    NSString *newElement=[myArray objectAtIndex:1];
    NSLog(@"New object at index 1 BEFORE is %@", newElement);
    [myArray replaceObjectAtIndex:1 withObject:@"Hello"];
    NSLog(@"New object at index 1 AFTER is %@", newElement);

从理论上讲,newElement的输出现在应该显示"Hello",但它仍然显示"Second String"

输出:

2012-05-30 11:21:16.638 cocoa lab[753:403] New object at index 1 BEFORE is Second string
2012-05-30 11:21:16.641 cocoa lab[753:403] New object at index 1 AFTER is Second string

请指教

谢谢