1.计算程序运行时间
#define STARTTIME NSDate *startTime = [NSDate date]
#define STOPTIME NSLog(@"Time: %f", -[startTime timeIntervalSinceNow])
2.根据模拟器或真机执行不同代码
#if defined (__i386__) || defined (__x86_64__)
//模拟器下执行
#else
//真机下执行
#endif
3.颜色的宏定义
// 随机颜色
#define RANDOM_COLOR [UIColor colorWithRed:arc4random_uniform(256) / 255.0 green:arc4random_uniform(256) / 255.0 blue:arc4random_uniform(256) / 255.0 alpha:1]
// 颜色(RGB)
#define RGB_COLOR(r, g, b) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:1]
// 利用这种方法设置颜色和透明值，可不影响子视图背景色
#define RGBA_COLOR(r, g, b, a) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:(a)]
4.iOS应用程序直接退出
- (void)exitApplication {
AppDelegate *app = [UIApplication sharedApplication].delegate;
UIWindow *window = app.window;
[UIView animateWithDuration:1.0f animations:^{
window.alpha = 0;
} completion:^(BOOL finished) {
exit(0);
}];
}
5.设置状态栏文字样式颜色
[[UIApplication sharedApplication] setStatusBarHidden:NO];
// 黑色（默认）
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];
// 白色
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
// 动画的改变statusBar的前景色
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];
6.获取iOS路径方法
//获取家目录路径的函数
NSString *homeDir = NSHomeDirectory();
//获取Documents目录路径的方法
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docDir = [paths objectAtIndex:0];
//获取Documents目录路径的方法
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cachesDir = [paths objectAtIndex:0];
//获取tmp目录路径的方法：
NSString *tmpDir = NSTemporaryDirectory();
7.将网络数据转换成字符串
-(NSString *)getDataByURL:(NSString *)url {
return [[NSString alloc] initWithData:[NSData dataWithContentsOfURL: [NSURL URLWithString:[url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]] encoding:NSUTF8StringEncoding];
}
8.iPhone/iPad强制横屏
[application setStatusBarOrientation:UIInterfaceOrientationLandscapeRight animated:NO];
9.键盘监听事件
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillChangeFrameNotification object:nil];
10.UITableViewCell 隐藏多余的分割线
-(void)setExtraCellLineHidden: (UITableView *)tableView
{
UIView *view = [UIView new];
view.backgroundColor = [UIColor clearColor];
[tableView setTableFooterView:view];
}
11.在项目中打开appStore及打开对软件的评价
//以下是通过id打开此软件的评价
int m_appleID = 836500024;
NSString *str = [NSString stringWithFormat:@"itms-apps//ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=%d", m_appleID ];
//以下是通过appstore链接到自己应用在商店的位置 eg:打开微信
NSString *url = [NSString stringWithFormat:@"https://itunes.apple.com/cn/app/wechat/id836500024?mt=12"];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];
12.项目拨打电话，调用safari，点用mail，调用SMS，跳转设置界面
//1、调用 电话phone
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://4008008288"]];
//2、调用自带 浏览器 safari
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.abt.com"]];
//3、调用 自带mail
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto://[email protected]"]];
//4、调用 SMS
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms://800888"]];
//5，跳转到系统设置相关界面
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=WIFI"]];
13.获取设备版本号
float version = [[[UIDevice currentDevice] systemVersion] floatValue];
14.查看设备所支持的字体
for (NSString *family in [UIFont familyNames]) {
// 查看字体簇
NSLog(@"%@", family);
for (NSString *font in [UIFont fontNamesForFamilyName:family]) {
NSLog(@"\t%@", font);
}
}
15.页面切换效果
// 模态推出界面效果
controller.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
// 模态推出界面
[self presentModalViewController:controller animated:YES];
//可供使用的效果：
UIModalTransitionStyleCoverVertical //新视图从下向上出现
UIModalTransitionStyleFlipHorizontal //以设备的长轴为中心翻转出现
UIModalTransitionStyleCrossDissolve //渐渐显示
UIModalTransitionStylePartialCurl //原视图向上卷起
//恢复之前的页面：
[self dismissModalViewControllerAnimated:YES];
16.获取截屏
- (UIImage *)getScreenShot {
UIGraphicsBeginImageContext(self.view.bounds.size);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
17.UIScrollView 相关设置
// 隐藏竖向滚动条
scrollView.showsVerticalScrollIndicator = FALSE;
// 隐藏横向滚动条
scrollView.showsHorizontalScrollIndicator = FALSE;
// 设置滑动范围不超过本身即不显示边界缓冲
[scrollView setBounces:NO];
