iOS导航栏透明的处理
最近碰到项目需求是一个导航栏多种样式的处理 而且有些页面还需要渐变效果
没办法看了很多demo 还是没有符合需求的。但是看了那么多demo也发现并不是很难。所以自己写一个自定义的导航栏
在.h中暴露需要改变的东西
@interface UDNavigationController : UINavigationController
@property (nonatomic, assign) BOOL changing;
@property (nonatomic, strong) UIView *alphaView;//frame为(0,20,[UIScreen mainScreen].bounds.size.width,20)
@property (nonatomic, strong) UIView *statusView;//状态栏,因为有些页面的状态栏是白色 有些是黑色。真是坑爹
@property (nonatomic, strong) UIView *line;//frame为(0,63,[UIScreen mainScreen].bounds.size.width,1)的线条。因为有很多页面的底色是白色 没有这条线很丑、也是被测试说的没办法
//设置透明
-(void)setAlphOpquae;
//设置不透明
- (void)setAlphTransparent;
@end
好啦~开始写.m了
- (instancetype)initWithRootViewController:(UIViewController *)rootViewController{
self = [super initWithRootViewController:rootViewController];
if (self) {
CGRect frame = self.navigationBar.frame;
_alphaView = [[UIView alloc] initWithFrame:CGRectMake(0, 20, kScreenWidth, frame.size.height )];
_alphaView.clipsToBounds = YES;
_alphaView.backgroundColor = [UIColor whiteColor];
_statusView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, kScreenWidth, 20)];
_statusView.backgroundColor = [UIColor blackColor];
_line = [[UIView alloc]initWithFrame:CGRectMake(0, 63, kScreenWidth, 1)];
_line.backgroundColor = RGBACOLOR(235, 235, 235, 1);
_changing = NO;
[self.view insertSubview:_alphaView belowSubview:self.navigationBar];
[self.view insertSubview:_statusView aboveSubview:self.navigationBar];
[self.view insertSubview:_line aboveSubview:self.navigationBar];
[self.navigationBar setBackgroundImage:[UIImage imageNamed:@"Guide03.jpg"] forBarMetrics:UIBarMetricsCompact];
self.navigationBar.layer.masksToBounds = YES;
[self.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor]}];
self.navigationBar.tintColor = [UIColor whiteColor];
}
return self;
}
//设置透明
-(void)setAlphOpquae{
if (_alphaView.alpha == 1.0) {
return;
}
[UIView animateWithDuration:0.25 animations:^{
_alphaView.alpha = 1.0;
_line.alpha = 1.0;
} completion:^(BOOL finished) {
_alphaView.alpha = 1.0;
_line.alpha = 1.0;
_changing = NO;
}];
}
//设置不透明
- (void)setAlphTransparent{
if(_alphaView.alpha == 0.0){
return;
}
[UIView animateWithDuration:0.25 animations:^{
_alphaView.alpha = 0.0;
_line.alpha = 0.0;
} completion:^(BOOL finished) {
_changing = NO;
_alphaView.alpha = 0.0;
_line.alpha = 0.0;
}];
}
希望以后不会用到这么坑的导航栏T T
