Question

如何制作位于iPhone上UI工具栏左侧的按钮？

Answer 1

举个例子，你需要这样的东西。

    UIBarButtonItem *fixedCenter = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    fixedCenter.width = 80.0f;
    UIBarButtonItem *fixedLeft = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    fixedLeft.width = 40.0f;

    UIBarButtonItem *left = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"left.png"] style:UIBarButtonItemStylePlain target:self action:@selector(moveBack:)];
    UIBarButtonItem *right = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"right.png"] style:UIBarButtonItemStylePlain target:self action:@selector(moveForward:)];

    [self setToolbarItems:[NSArray arrayWithObjects:fixedLeft, flex, left, fixedCenter, right, flex, action, nil]];

Answer 2

您需要两个UIBarButtonItems。一个是你的按钮，一个是灵活的空间，在放置所有物品后，它将占据酒吧的尽可能多的空间。根据您设置项目的顺序，该按钮将显示在最左侧或右侧。如果先添加空格然后再添加按钮，则所有按钮都对齐。反过来，你的按钮将放在最左边。

试试这个：

UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithTitle:@"Button Title" style:UIBarButtonItemStylePlain target:self action:@selector(yourMethod:)];


[toolbar setItems:[NSArray arrayWithObjects:leftButton, flexibleSpace, nil]];
[flexSpace release];
[leftButton release];

如何在iPhone的工具栏左侧制作按钮

2 个答案: