iphone 开发笔记四

iOS开发指南：获取设备信息与自定义界面元素

最新推荐文章于 2021-08-10 20:16:50 发布

wapysun

最新推荐文章于 2021-08-10 20:16:50 发布

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31、遍历histogramview里面的所有对象：
UILabel *label in [histogramview subviews];

32、判断对象是否属于某个类：
[label isKindOfClass:[UILabel class]];

32、UIColor自定义颜色：
viewController.view.backgroundColor = [UIColor colorWithRed:192.0f/255.0f green:204.0f/255.0f blue:255.0f/255.0f alpha:0.5f];

33 、自动调用数字键盘：
[self.passwordinput setKeyboardType:UIKeyboardTypeNumbersAndPunctuation];

34、获取iPhone序列号： UIDevice *mydevice = [UIDevice currentDevice]; NSString *deviceID = [mydevice uniqueIdentifier]; 获取IPhone/IPad设备信息 NSLog([[UIDevice currentDevice] name]); // Name of the phone as named by user NSLog([[UIDevice currentDevice] uniqueIdentifier]); // A GUID like string NSLog([[UIDevice currentDevice] systemName]); // "iPhone OS" NSLog([[UIDevice currentDevice] systemVersion]); // "2.2.1" NSLog([[UIDevice currentDevice] model]); // "iPhone" on both devices NSLog([[UIDevice currentDevice] localizedModel]); // "iPhone" on both devices 35、不让iphone进入休眠模式： [UIApplication sharedApplication].idleTimerDisabled=YES; 36、一定时间后触发事件： [self performSelector:@selector(getIT) withObject:self afterDelay:2.0f];//2秒后执行getIT函数 37、更改navication bar背景 在m文件顶端加入如下代码： @interface UINavigationBar (MyCustomNavBar) @end @implementation UINavigationBar (MyCustomNavBar) - (void) drawRect:(CGRect)rect { UIImage *barImage = [UIImage imageNamed:@"bar.png"]; [barImage drawInRect:rect]; } @end 38、更改tab bar背景 在m文件顶端加入如下代码： @implementation UITabBar (CustomImage) - (void)drawRect:(CGRect)rect { UIImage *image = [UIImage imageNamed: @"bar.png"]; [image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)]; } @end 39、切换tab bar时触发的事件 - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { NSLog(@"%i",viewController.tabBarItem.tag); } 40、更改UISearch Bar的按钮文字 for(id cc in [searchtext subviews]){ if([cc isKindOfClass:[UIButton class]]){ [btn setTitle:@"Search" forState:UIControlStateNormal]; } }