1,判断当前系统的版本
[[[UIDevice currentDevice] systemVersion ] floatValue] >= 7;这样会返回一个float的值回来,然后通过对这个值进行判断
2,播放音乐
NSString* path =[ [NSBundle mainBundle] pathForResource:@"music" ofType:@"wav"];
[NSURL *url =[ NSURL fileURLWithPath:path];
SystemSoundID soundId;
AudioSevercesCreateSystemSoundID((CFURLRef)url,&soundId);
AudioSevercesPlaySystemSound(soundId);
3.UIDevice的运用
设备相关信息获取
[[UIDevice currentDivice] name] //获取的是设备名称
[[UIDevice currentDevice] uniqueIndentifier];//获取设备唯一标示符
[[UIDevice currentDevice] systemName];//系统名称“IOS”
[[UIDevice currentDevice] systemVersion];//系统版本号 ‘4.0’
[[UIDevice currentDevice] model];//设备模式 @“iPhone” @"iPad"
[[UIDevice currentDevice] localizedModel];本地设备模式
4.关于导航栏的一些操作
//设置导航栏背景颜色 [[UINavigationBar appearance] setBarTintColor:[UIColor grayColor]]; //当然在开发过程中我们一般会使用16进制的颜色值所以只要添加一个函数就搞定啦! #define DEFAULT_VOID_COLOR [UIColor whiteColor] + (UIColor *)colorWithHexString:(NSString *)stringToConvert { NSString *cString = [[stringToConvert stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString]; if ([cString length] < 6) return DEFAULT_VOID_COLOR; if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1]; if ([cString length] != 6) return DEFAULT_VOID_COLOR; NSRange range; range.location = 0; range.length = 2; NSString *rString = [cString substringWithRange:range]; range.location = 2; NSString *gString = [cString substringWithRange:range]; range.location = 4; NSString *bString = [cString substringWithRange:range]; unsigned int r, g, b; [[NSScanner scannerWithString:rString] scanHexInt:&r]; [[NSScanner scannerWithString:gString] scanHexInt:&g]; [[NSScanner scannerWithString:bString] scanHexInt:&b]; return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f]; } /*这样是不是方便多啦!呵呵。。。*/ //当然我们还可以为导航栏添加背景图片 [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"nav_bg"] forBarMetrice:UIBarMetriceDefault]; //定制返回按钮 首先设置文字的颜色值 [[UINavigationBar appearance] setTintColor:[UIColor whiteColor]]; // [[UINavigationBar appearance] setBackIndicatorImage:[UIImage imageNamed:@"back.png"]]; [[UINavigationBar appearance] setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@"back.png"]]; //修改导航栏标题的字体 [UINavigationBar appearance] setTitleTextAttributes:[NSDictionary dictionarywithObjectsAndKeys:nil]]; //修改导航栏标题 self.navigationItem.titleView =[[UIIMageView alloc] initWithImage:[UIImage imageNamed:@"title.png"]]; //修改状态栏风格(override) -(UIStatusBarStyle)preferredStatusBarStyle { return UIStatusBarStyleLightContent; } //隐藏状态栏(override) - (BOOL)prefersStatusBarHidden { return YES; }iOS 7 在启动期间改变状态栏颜色
防止恶意点击的操作
- (void)starButtonClicked:(id)sender
{
//先将未到时间执行前的任务取消。
[[self class] cancelPreviousPerformRequestsWithTarget:self selector:@selector(todoSomething:) object:sender];
[self performSelector:@selector(todoSomething:) withObject:sender afterDelay:0.2f];
}
时间操作
/获取当前时间 +(NSString *)getCurrentDate{ NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; NSString *date = [dateFormatter stringFromDate:[NSDate date]]; return date; } //获取当前时间戳 +(NSString *)getCuttentStack{ NSDate *localDate = [NSDate date]; NSString *date = [NSString stringWithFormat:@"%ld",(long)[localDate timeInterValSince1970]]; return date; } //将时间转换为时间戳 +(NSString *)changeStrTimeToStack:(NSString *)timestr { NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"'yyyy'-'MM'-'dd' T 'HH':'mm':'ss'"]; NSDate *date = [dateFormatter dataFromString:timestr]; NSStirng *time = [NSStirng stringWithFormat:@"%ld",(long)[date timeInterValSince1970]]; return time; } //将时间戳装换为时间 +(NSString *)changeTimeToStr:(NSString *)timeStack { NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; NSDate *date = [NSDate dateWithTimeIntervalsince1970:[times intValue]]; NSString *time = [dateFormatter stringFromDate:date]; return time; }
ARC和非ARC之间的转换操作
在开发的过程中经常会碰到有些是非ARC的文件(尤其是我们在加载第三方)的时候特别的明显,那我们要怎么搞定这个问题呢?
1.选中项目target
2,选中target中的Compile Sources
3.然后选中你需要操作的文件(是双击操作),然后会弹出一个类似编辑框的东东
4.如果你需要该文件进行ARC操作的话 输入-fobjc-arc 不需要ARC操作的 话 -fno-objc-arc就可以搞定啦!
希望对你有所帮助哈!