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(gè)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(gè)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;
