話不多說，直接進(jìn)主題
一、防止UIButton，cell等重復(fù)點(diǎn)擊
主要是快速點(diǎn)擊button或者cell，所對(duì)應(yīng)的action或者邏輯會(huì)走多次，例如：點(diǎn)擊button或者cell調(diào)用撥打電話的方法，會(huì)彈出撥打電話框好多次；這個(gè)對(duì)用戶不太友好；問了下哥們兒，他給了個(gè)宏，目前算是解決這個(gè)問題；代碼如下：
// 防止多次調(diào)用#define kPreventRepeatClickTime(_seconds_) /static BOOL shouldPrevent; /if (shouldPrevent) return; /shouldPrevent = YES; /dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)((_seconds_) * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ /shouldPrevent = NO; /}); /總的思路是設(shè)置一個(gè)bool變量，記錄一下，延時(shí)更改下變量的值；使用：在所需要的button或者cell的action前調(diào)用即可：
kPreventRepeatClickTime(0.5);
二、獲取當(dāng)前視圖最頂層的ViewController
獲取當(dāng)前視圖最頂層的ViewController
+ (UIViewController *)currentViewController { UIWindow * window = [[UIApplication sharedApplication] keyWindow]; if (window.windowLevel != UIWindowLevelNormal){ NSArray *windows = [[UIApplication sharedApplication] windows]; for(UIWindow * tmpWin in windows){ if (tmpWin.windowLevel == UIWindowLevelNormal){ window = tmpWin; break; } } } UIViewController *currentVC = window.rootViewController; while (currentVC.presentedViewController) { currentVC = currentVC.presentedViewController; } if ([currentVC isKindOfClass:[UITabBarController class]]) { currentVC = [(UITabBarController *)currentVC selectedViewController]; } if ([currentVC isKindOfClass:[UINavigationController class]]) { currentVC = [(UINavigationController *)currentVC topViewController]; } return currentVC;}三、代碼截圖相關(guān)
截取指定的View：
/// 截屏- (void)actionForScreenShotWith:(UIView *)aimView savePhoto:(BOOL)savePhoto { if (!aimView) return; UIGraphicsBeginImageContextWithOptions(aimView.bounds.size, NO, 0.0f); [aimView.layer renderInContext: UIGraphicsGetCurrentContext()]; UIImage* viewImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); if (savePhoto) { /// 保存到本地相冊(cè) UIImageWriteToSavedPhotosAlbum(viewImage, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL); }}保存圖片的回調(diào)處理
- (void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{ if (error) { NSLog(@"保存失敗，請(qǐng)重試"); } else { NSLog(@"保存成功"); }}總結(jié)
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