模仿拍完照的閃現效果

self.view.alpha = 0.0;
                                                                    [UIView animateWithDuration: 0.5
                                                                                     animations: ^{
                                                                                         self.view.alpha = 1.0;
                                                                                     }
                                                                                     completion: ^(BOOL finished) {
                                                                                     }
                                                                     ];

在moveRowAtIndexPath動畫之後加入callback

[CATransaction begin];
    [CATransaction setCompletionBlock: ^{
        // Code to be executed upon completion
        [self connectPrinterWithDeviceInfo:deviceInfo];
    }];
    [tableView beginUpdates];
    [tableView moveRowAtIndexPath:indexPath toIndexPath:newIndexPath];
    [tableView endUpdates];
    [CATransaction commit];

在段落中某些特定文字加入連結

• 只有UITextView可以做到。

• 要實作UITextViewDelegate

self.linkTextView.delegate = self; 

#pragma mark - UITextViewDelegate
- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(nonnull NSURL *)URL inRange:(NSRange)characterRange {
     //可以做些判斷
    return YES;
}

• 加入某段文字 

NSString *str = @"For help please visit our Knowledge base";
    NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:str];
    [attrStr addAttribute:NSLinkAttributeName value:[NSURL URLWithString:@"https://yourUrl.com"] range:[str rangeOfString:@"Knowledge base"]];
    self.linkTextView.attributedText = attrStr;
  

• 整段文字

NSDictionary *dictAttr = @{NSLinkAttributeName:[NSURL URLWithString:@"http://yourUrl.com"]};
    NSAttributedString *attrStr = [[NSAttributedString alloc]initWithString:@"please visit our Knowledge base" attributes:dictAttr];
    self.linkTextView.attributedText = attrStr;

去特定的setting頁

// wifi settings 

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"App-Prefs:root=WIFI"]];

// Bluetooth settings 

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"App-Prefs:root=Bluetooth"]];