已經(jīng)很久沒有寫簡書了,主要是不知道要寫點(diǎn)什么。這次主要是記錄一些自己在開發(fā)過程中覺得有必要記載的一些小知識(shí),以免自己忘記。后期也會(huì)不定期的更新。下面就直接進(jìn)入主題吧!

• pch文件的配置
  如果pch就在項(xiàng)目目錄中
  $(SRCROOT)/項(xiàng)目名/pch文件
  如果pch文件在項(xiàng)目中的一個(gè)文件夾內(nèi)
  $(SRCROOT)/項(xiàng)目名/文件夾名/pch文件

• 利用TabBarController搭建項(xiàng)目基本結(jié)構(gòu)

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self addAllChildViewController];
}

/**
 * 添加所有子控制器
 */
- (void)addAllChildViewController {
   
}

/**
 * 設(shè)置子控制器
 */
- (void)setupChildViewController:(UIViewController *)vc title:(NSString *)title imageName:(NSString *)imageName selectedImageName:(NSString *)selectedImageName {
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
    vc.title = title;
    vc.tabBarItem.image = GetImage(imageName);
    vc.tabBarItem.selectedImage = [GetImage(selectedImageName) imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    
    [self addChildViewController:nav];
}

• 設(shè)置tabBarItem 文字的顏色

[[UITabBarItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName : RGBACOLOR(81, 81, 81, 1.0)} forState:UIControlStateNormal];
[[UITabBarItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName : RGBACOLOR(18, 150, 219, 1.0)} forState:UIControlStateSelected];

• Masonry 動(dòng)畫

重點(diǎn):[view.superview layoutIfNeeded];
示例:
[view mas_makeConstraints:^(MASConstraintMaker *make) {
    make.top.mas_equalTo(400);
    make.left.mas_equalTo(100);
    make.size.mas_equalTo(CGSizeMake(100, 100));
}];

[view.superview layoutIfNeeded];//如果其約束還沒有生成的時(shí)候需要?jiǎng)赢嫷脑挘驼埾葟?qiáng)制刷新后才寫動(dòng)畫，否則所有沒生成的約束會(huì)直接跑動(dòng)畫

[UIView animateWithDuration:3 animations:^{
    [view mas_updateConstraints:^(MASConstraintMaker *make) {
        make.left.mas_equalTo(200);
    }];
    [view.superview layoutIfNeeded];//強(qiáng)制繪制

}];

• 字符編碼
  iOS中對字符串進(jìn)行UTF-8編碼：輸出str字符串的UTF-8格式
  [str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
  解碼：把str字符串以UTF-8規(guī)則進(jìn)行解碼
  [str stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
• 導(dǎo)航控制器奇幻的時(shí)候偶爾卡住的原因

原因:在RootViewController右劃返回手勢也可以響應(yīng)，因?yàn)闆]有上一級(jí)頁面，導(dǎo)致整個(gè)程序頁面不響應(yīng)
解決辦法: 在導(dǎo)航控制器的viewDidLoad方法中設(shè)置代理
- (void)viewDidLoad {
    [super viewDidLoad];
    self.delegate = self;
}
然后實(shí)現(xiàn)代理方法,判斷是否是根控制器
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
    if (navigationController.viewControllers.firstObject == viewController) {
        self.interactivePopGestureRecognizer.enabled = false;
    }else {
        self.interactivePopGestureRecognizer.enabled = true;
    }
}

未完待續(xù)......