iOS-使用代码CGImage调节tabBar上按钮图片的大小

NSArray *EnglishTitleArray = @[@"toutiao",@"shequ",@"xuanche",@"jiangjia",@"wode"];

static NSInteger markIndex = 0;

//遍历tabBar视图控制器
for (UINavigationController *navigation in self.viewControllers) {
UIViewController *vc = navigation.viewControllers.firstObject;

//拼装图片名
NSString *normalImageName = [NSString stringWithFormat:@"btn_%@_nor.9",EnglishTitleArray[markIndex]];
NSString *checkedImageName = [NSString stringWithFormat:@"btn_%@_select.9",EnglishTitleArray[markIndex]];

//get图片 调节图片大小
UIImage *normalImage = [UIImage imageWithCGImage:[UIImage imageNamed:normalImageName].CGImage scale:2 orientation:UIImageOrientationUp];

UIImage *checkedImage = [UIImage imageWithCGImage:[UIImage imageNamed:checkedImageName].CGImage scale:2 orientation:(UIImageOrientationUp)];

//创建tabBarItem
UITabBarItem *item = [[UITabBarItem alloc]initWithTitle:nil image:normalImage selectedImage:checkedImage];
vc.tabBarItem = item;

//调节button位置
vc.tabBarItem.imageInsets = UIEdgeInsetsMake(5, 0, -5,0);

markIndex ++;
}