效果图：
.h----->
#importtypedef void(^WelfareBlock)(void);
@interface MyTabbar : UITabBar
@property (copy , nonatomic) WelfareBlock block;
@end
.m----->
#import "MyTabbar.h"
#import "WelfareBarItemView.h"
@interface MyTabbar ()
@property (strong , nonatomic) WelfareBarItemView * welfareBarItemView;
@end
@implementation MyTabbar
-(WelfareBarItemView *)welfareBarItemView
{
if (!_welfareBarItemView) {
CGFloat tabBarButtonW = SCREEN_WIDTH / 5;
_welfareBarItemView = [[WelfareBarItemView alloc] initWithFrame:CGRectMake(tabBarButtonW * 2, -15, tabBarButtonW, 64)];
}
return _welfareBarItemView;
}
- (instancetype)init
{
self = [super init];
if (self) {
[self addSubview:self.welfareBarItemView];
self.barTintColor = [UIColor whiteColor];
UIButton * button = [[UIButton alloc] init];
button.backgroundColor = [UIColor clearColor];
[button addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:button];
[button zxp_addConstraints:^(ZXPAutoLayoutMaker *layout) {
layout.topSpace(0);
layout.leftSpace(0);
layout.rightSpace(0);
layout.bottomSpace(0);
}];
}
return self;
}
-(void)layoutSubviews
{
[super layoutSubviews];
// 设置其他tabbarButton的frame
CGFloat tabBarButtonW = SCREEN_WIDTH / 5;
CGFloat tabBarButtonIndex = 0;
for (UIView *child in self.subviews) {
Class class = NSClassFromString(@"UITabBarButton");
if ([child isKindOfClass:class]) {
// 设置x
CGRect rect = child.frame;
rect.origin.x = tabBarButtonIndex * tabBarButtonW;
// 设置宽度
rect.size.width = tabBarButtonW;
child.frame = rect;
// 增加索引
tabBarButtonIndex++;
if (tabBarButtonIndex == 2) {
tabBarButtonIndex++;
}
}
}
}
-(void) buttonClick
{
self.block();
}
@end
MyTabBarViewController中：
MyTabbar * tabBar = [[MyTabbar alloc] init];
__weak typeof(self)weakSelf = self;
tabBar.block = ^(){
[weakSelf presentMoneyViewController];
};
[self setValue:tabBar forKey:@"tabBar"];
MyTabBarViewController参考：https://github.com/Damonvvong/DWCustomTabBarDemo