自定义tabBar能够解决自定义图片无法显示(只显示一块颜色)这个弊端,自定义tabBar要继承UITabBarController
原图片:
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下面是自定义了一个TabBar ,每个按钮可以显示图片(自定义避免了图片无法显示只显示一块颜色)
效果图:
一, 首先创建一个继承UIButton的类CustomTabBar,
在.h文件中:
//指定协议是为了实现点击button显示相应地页面,像系统的tabBar一样
@protocol CustomTabBarDelegate <NSObject>
-(void)didSelectBarItemAtIndex:(NSInteger)index;
@end
@interface CustomTabBar : UIButton
@property(nonatomic,assign) NSInteger index;
@property (nonatomic,retain) id<CustomTabBarDelegate> delegate;
- (id)initWithFrame:(CGRect)frame WithImage:(UIImage *)image AndSelectedImage:(UIImage *)image;
@end
在.m文件中
#import "CustomTabBar.h"
@interface CustomTabBar ()
@end
@implementation CustomTabBar
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
- (id)initWithFrame:(CGRect)frame WithImage:(UIImage *)image AndSelectedImage:(UIImage *)selectedImage{
self = [super initWithFrame:frame];
if (self) {
self.frame = frame;
[self setAdjustsImageWhenHighlighted:NO];
[self setImage:image forState:UIControlStateNormal];
[self setImage:selectedImage forState:UIControlStateSelected];
[self addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
}
return self;
}
-(void)click:(UIButton *)btn{
if ([self.delegate respondsToSelector:@selector(didSelectBarItemAtIndex:)]) {
[self.delegate didSelectBarItemAtIndex:self.index];
}
switch ((int)(btn.selected)) {
case 0:
btn.selected = YES;
break;
case 1:
btn.selected = NO;
break;
default:
break;
}
}
@end
二, 创建一个类CustomizedTabBarController继承UITabBarController
在.m文件中
- (void)loadViewController
{
CoverCollectionViewController *coverVC = [[CoverCollectionViewController alloc] init];
//coverVC.title = @"每日封面";
CustomizedNavigationController *coverNaVC = [[CustomizedNavigationController alloc] initWithRootViewController:coverVC];
coverNaVC.navigationItem.title = @"iDailyWATCh";
NewsTableViewController *newsVC = [[NewsTableViewController alloc] init];
//newsVC.title = @"腕表杂志";
CustomizedNavigationController *newsNaVC = [[CustomizedNavigationController alloc] initWithRootViewController:newsVC];
BrandsTableViewController *brandsVC = [[BrandsTableViewController alloc] init];
//brandsVC.title = @"品牌维基";
CustomizedNavigationController *brandsNaVC = [[CustomizedNavigationController alloc] initWithRootViewController:brandsVC];
VideosCollectionViewController *videosVC = [[VideosCollectionViewController alloc] init];
//videosVC.title = @"视频";
CustomizedNavigationController *videosNaVC = [[CustomizedNavigationController alloc] initWithRootViewController:videosVC];
MoreViewController *moreVC = [[MoreViewController alloc] init];
//moreVC.title = @"更多";
CustomizedNavigationController *moreNaVC = [[CustomizedNavigationController alloc] initWithRootViewController:moreVC];
self.viewControllers = @[coverNaVC, newsNaVC, brandsNaVC, videosNaVC, moreNaVC];
self.selectedIndex = 0;
RELEASE_SAFE(coverNaVC);
RELEASE_SAFE(coverVC);
RELEASE_SAFE(brandsNaVC);
RELEASE_SAFE(brandsVC);
RELEASE_SAFE(videosNaVC);
RELEASE_SAFE(videosVC);
RELEASE_SAFE(moreNaVC);
RELEASE_SAFE(moreVC);
}
- (void)setupTabBar
{
for (int i = 0 ; i < 5; i++) {
if (i < 3) {
CustomTabBar *bar = [[CustomTabBar alloc]initWithFrame:CGRectMake(0 + 80 * i, 0, 80, 49) WithImage: [UIImage imageNamed:[NSString stringWithFormat:@"%d", i + 100]]AndSelectedImage:[UIImage imageNamed:[NSString stringWithFormat:@"%d", i + 130]]];
bar.index = i;
bar.delegate = self;
bar.backgroundColor = RGB(245, 245, 245);
[self.tabBar addSubview:bar];
[bar release];
if (i == 0) {
bar.selected = YES;
}
} else {
CustomTabBar *bar = [[CustomTabBar alloc]initWithFrame:CGRectMake(0 + 40 * (i + 3), 0, 40, 49) WithImage: [UIImage imageNamed:[NSString stringWithFormat:@"%d", i + 100]]AndSelectedImage:[UIImage imageNamed:[NSString stringWithFormat:@"%d", i + 130]]];
bar.index = i;
bar.delegate = self;
bar.backgroundColor = RGB(245, 245, 245);
[self.tabBar addSubview:bar];
[bar release];
}
}
}
-(void)didSelectBarItemAtIndex:(NSInteger)index{
[self resignBatState];
self.selectedViewController = self.viewControllers[index];
}
-(void)resignBatState{
NSArray *arr = [self.tabBar subviews];
for (CustomTabBar *bar in arr) {
if ([bar isKindOfClass:[CustomTabBar class]]) {
bar.selected = NO;
}
}
}
- (void)changeViewController:(UIButton *)button
{
self.selectedIndex = button.tag;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}