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objective-c - IOS implements synchronization operation + timeout mechanism, how to optimize my solution [timer is repeatedly created]

My problem is as shown in the picture, please help me find a solution. It is not necessary to use a timer, but...

From [iOSdiscussion group] 2017-05-02 09:36:42 0  0  735

objective-c - wkwebview js interaction how to add multiple ScriptMessageHandler conveniently and quickly

If there are many interactive methods, it is annoying to add them one by one and have to remove them one by on...

From [iOSdiscussion group] 2017-05-02 09:36:41 0  0  747

objective-c - ios-OCR-Tesseract

When running after adding the Chinese library (chi_sim), the program will crash, but when the mode is changed ...

From [iOSdiscussion group] 2017-05-02 09:36:38 0  1  760

Objective-c - iOS upload to 7Niu South China failed to solve?

As shown in the picture, the Android side has been successfully uploaded and the space of South China has been...

From [iOSdiscussion group] 2017-05-02 09:36:32 0  0  3000

objective-c - Class<protocol name>*variable name What is the way to write this?

I saw someone writing this. What does this mean? Is there any article I can read? For example, UIButton&lt...

From [iOSdiscussion group] 2017-05-02 09:36:31 0  1  629

objective-c - About image processing

I took a picture out of the photo album. How can I give him a suitable frame so that the display is not blurry...

From [iOSdiscussion group] 2017-05-02 09:36:29 0  1  636

objective-c - development process similar to Zhihu's appreciation function

1. Appreciation function, Alipay payment, WeChat payment, because it is a reward, there is no physical item, A...

From [iOSdiscussion group] 2017-05-02 09:36:27 0  1  1099

iOS development: UILabel recognizes HTML tags

iOS development: UILabel recognizes HTML tags. The html returned in the background contains not only text but ...

From [iOSdiscussion group] 2017-05-02 09:36:23 0  1  747

iOS how to send byte array to peripheral via bluetooth

[self.peripheral writeValue:data forCharacteristic:self.writeCharacteristic type:CBCharacteristicWriteWithResp...

From [iOSdiscussion group] 2017-05-02 09:36:21 0  1  724

Objective-c - NSInteger reports warning

警告為: Values of type 'NSInteger' should not be used as format arguments...

From [iOSdiscussion group] 2017-05-02 09:36:19 0  2  773

objective-c - call kit

After the call is not answered in callkit, in which callback is the callback handled?

From [iOSdiscussion group] 2017-05-02 09:36:17 0  0  740

objective-c - ipa resign

ios-app-signer prompts that the signature failed. Does anyone know the reason?

From [iOSdiscussion group] 2017-05-02 09:36:14 0  0  666

objective-c - iOS How to upload a video selected in the photo album?

How to upload a video selected in the photo album on iOS?

From [iOSdiscussion group] 2017-05-02 09:36:12 0  0  615

Objective-c - How is KVC implemented through runtime in OC?

How is KVC implemented through runtime in OC?

From [iOSdiscussion group] 2017-05-02 09:36:10 0  0  839

Objective-c - When using Qiniu's PLStreaming to push the stream, the first push will fail every time, and reconnecting will not work. It will be normal after exiting the Viewcontroller. What is the problem?

(www.sf.gg) is China's leading developer technology community. We hope to provide a pure, high-quality technic...

From [iOSdiscussion group] 2017-05-02 09:36:08 0  1  933