iOS UIBarButtonItem間距、title點擊大小改變

UIBarButtonItem的使用

一、initWithTitle  字體大小、顏色

    UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:@"說明" style:UIBarButtonItemStylePlain target:self action:@selector(onRightButtonClick)];
    item.tintColor = [UIColor whiteColor];
    self.navigationItem.rightBarButtonItem = item;
    [self.navigationItem.rightBarButtonItem setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont boldSystemFontOfSize:14],NSFontAttributeName, nil] forState:UIControlStateNormal];
    [self.navigationItem.rightBarButtonItem setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont boldSystemFontOfSize:14],NSFontAttributeName, nil] forState:UIControlStateHighlighted];

二、initWithCustomView 兩個Item之間的間距

    UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeCustom];
    [btn1 addTarget:self action:@selector(onSZRightButtonClick) forControlEvents:UIControlEventTouchUpInside];
    [btn1 setImage:[UIImage imageNamed:@"icon-wd-sz"] forState:UIControlStateNormal];
    [btn1 sizeToFit];
    UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithCustomView:btn1];

    UIBarButtonItem *fixedSpaceBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    fixedSpaceBarButtonItem.width = 15;

    UIButton *btn2 = [UIButton buttonWithType:UIButtonTypeCustom];
    [btn2 addTarget:self action:@selector(onXXRightButtonClick) forControlEvents:UIControlEventTouchUpInside];
    [btn2 setImage:[UIImage imageNamed:@"icon-wd-xx"] forState:UIControlStateNormal];
    [btn2 sizeToFit];
    UIBarButtonItem *item2 = [[UIBarButtonItem alloc] initWithCustomView:btn2];

    self.navigationItem.rightBarButtonItems  = @[item2,fixedSpaceBarButtonItem,item1];

三、initWithImage 如果放兩個的話，間距不能控制，改用initWithCustomView

    UIImage *image = [[UIImage imageNamed:@"icon"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    UIBarButtonItem *leftBarButton = [[UIBarButtonItem alloc] initWithImage:image style:UIBarButtonItemStylePlain target:self action:@selector(onLeftButtonClick)];
    self.navigationItem.leftBarButtonItem = leftBarButton;