iOS小贴士

隐藏导航栏横线

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
@interface ViewController ()

@property (nonatomic, strong) UIImageView *navBarHairlineImageView;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

self.navBarHairlineImageView = [self findHairlineImageViewUnder:self.navigationController.navigationBar];
}

- (UIImageView *)findHairlineImageViewUnder:(UIView *)view {
if ([view isKindOfClass:UIImageView.class] && view.bounds.size.height <= 1.0) {
return (UIImageView *)view;
}
for (UIView *subview in view.subviews) {
UIImageView *imageView = [self findHairlineImageViewUnder:subview];
if (imageView) {
return imageView;
}
}
return nil;
}

- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];

self.navBarHairlineImageView.hidden = YES;
}

- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];

self.navBarHairlineImageView.hidden = NO;
}

Storyboard勾选Hide-Bottom-Bar-on-Push带来黑影问题

去掉”Hide Bottom Bar on Push”前面的勾,在相应的控制器中使用代码来实现tabbar的显示和隐藏,即分别在viewWillAppear和viewWillDisappear方法中实现所需要的效果。

判定viewWillDisappear是push还是pop

1
2
3
4
5
6
7
if ([self.navigationController.viewControllers indexOfObject:self] == NSNotFound) {
//pop
[self.navigationController setNavigationBarHidden:YES animated:YES]
} else {
//push
[self.navigationController setNavigationBarHidden:NO animated:YES];
}

自定义导航栏返回箭头导致返回手势失效

在自定义导航控制器viewDidLoad方法中加入如下代码:

1
self.interactivePopGestureRecognizer.delegate = (id)self;

自定义导航栏为渐变色

在自定义导航控制器中设置:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
#pragma mark - life cycle

- (void)viewDidLoad {
[super viewDidLoad];

[self setBarBackgroundColor];
}

#pragma mark - private method

- (void)setBarBackgroundColor {
for (UIView *view in self.navigationBar.subviews) {
if ([view isKindOfClass:NSClassFromString(@"_UIBarBackground")] || [view isKindOfClass:NSClassFromString(@"_UINavigationBarBackground")]) {

NSString *phoneVersion = [[UIDevice currentDevice] systemVersion];
UIView *iView = nil;
if (phoneVersion.floatValue < 10.0) {
iView = view;
} else {
for (UIView *subView in view.subviews) {
if ([subView isKindOfClass:[UIVisualEffectView class]]) {
iView = subView;
}
}
}
CRLog(@"it is");
CGRect frame = iView.frame;
CRLog(@"%@", NSStringFromCGRect(frame));
UIView *alphaView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height + 20)];
alphaView.backgroundColor = [UIColor whiteColor];
alphaView.userInteractionEnabled = NO;
[iView addSubview:alphaView];

[self setShadeColorWithView:alphaView];
}
}
}

- (void)setShadeColorWithView:(UIView *)view {
CAGradientLayer *gradientLayer = [CAGradientLayer layer];
gradientLayer.startPoint = CGPointMake(0, .5);
gradientLayer.endPoint = CGPointMake(1, .5);
gradientLayer.colors = @[(id)RGBA(76, 202, 90, 1).CGColor,(id)RGBA(39, 182, 112, 1).CGColor];
gradientLayer.frame = view.bounds;
[view.layer addSublayer:gradientLayer];
}

全局设置导航控制器返回按钮

在自定义导航控制器中做如下拦截处理:

1
2
3
4
5
6
7
8
9
10
11
12
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated {
UIImage *image = [[UIImage imageNamed:@"backButton_background"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:image style:UIBarButtonItemStyleDone target:self action:@selector(back)];

[super pushViewController:viewController animated:animated];
}

#pragma mark - back

- (void)back {
[self popViewControllerAnimated:YES];
}

通过Scheme区分管理Debug和Release环境

  • 1、 新建两个Scheme,分别为 projectName-DebugprojectName-Release ,编辑对应的Scheme,将 Build Configuration 分别改为 Debug 和 Release。
  • 2、 在PCH文件中添加如下宏定义:
    1
    2
    3
    4
    5
    #ifdef DEBUG
    #define kServer @"http://192.168.0.1:8080"
    #else
    #define kServer @"http://xxoo.com"
    #endif

Sample code:demo/Debug&Release-Demo

PCH常用宏定义

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
#define RGBA(r, g, b, a) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:a]
#define KSColor(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#define KSRandomColor CRColor(arc4random_uniform(256), arc4random_uniform(256), arc4random_uniform(256))

#define kCellSeparateColor RGBA(200, 199, 204, 1)

#ifdef DEBUG
#define KSLog(...) NSLog(@"%s %d \n %@ \n\n",__func__,__LINE__,[NSString stringWithFormat:__VA_ARGS__])
#define kServer @"http://192.168.1.xx"
#else
#define KSLog(...)
#define kServer @"http://xx.com"
#endif

#define kIsPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

#define kFontSize12 kIsPad ? [UIFont systemFontOfSize:14] : [UIFont systemFontOfSize:12]
#define kFontSize14 kIsPad ? [UIFont systemFontOfSize:16] : [UIFont systemFontOfSize:14]
#define kFontSize16 kIsPad ? [UIFont systemFontOfSize:18] : [UIFont systemFontOfSize:16]
#define kFontSize18 kIsPad ? [UIFont systemFontOfSize:20] : [UIFont systemFontOfSize:18]

#define kLastWindow [[UIApplication sharedApplication].windows lastObject]
您的支持将鼓励我继续创作!
0%