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iOS 20180624

date-to-milliseconds-and-back-to-date-in-swift
https://stackoverflow.com/questions/40134323/date-to-milliseconds-and-back-to-date-in-swift

Date Byte  BLE
how-to-convert-a-double-into-a-byte-array-in-swift
https://stackoverflow.com/questions/26953591/how-to-convert-a-double-into-a-byte-array-in-swift

ble-swift-write-characterisitc
https://stackoverflow.com/questions/26377615/ble-swift-write-characterisitc

round-trip-swift-number-types-to-from-data
https://stackoverflow.com/questions/38023838/round-trip-swift-number-types-to-from-data

nsdata-from-uint8
https://stackoverflow.com/questions/32455543/nsdata-from-uint8

switch-case-with-range
https://stackoverflow.com/questions/52665744/switch-case-with-range

how-in-swift-to-convert-int16-to-two-uint8-bytes



UI
how-to-detect-when-a-uiscrollview-has-finished-scrolling-in-swift
https://stackoverflow.com/questions/30582617/how-to-detect-when-a-uiscrollview-has-finished-scrolling-in-swift

uicollectionview-current-visible-cell-index


GPS
shorter-time-interval-for-location-updates
https://stackoverflow.com/questions/49040825/shorter-time-interval-for-location-updates

Realm DB

getting-started-with-realm-database-for-ios-in-swift

how-to-save-a-struct-to-realm-in-swift

how-to-find-my-realm-file

how-do-i-set-a-auto-increment-key-in-realm


Others

how-to-delete-a-user-default-value-in-nsuserdefaults

swift-beta-performance-sorting-arrays

how-to-perform-if-let-binding-with-struct-in-swift

swift-guard-let-and-where-the-priority
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collection view part6 swift

preselect collectionview https://stackoverflow.com/questions/45610785/how-to-preselect-and-highlight-a-cell-from-a-uicollectionview https://hackernoon.com/uicollectionviewcell-selection-made-easy-41dae148379d if collectionview allow multiple selection remeber add this, cell item could be Deselect collectionView. selectItem (at: indexPath, animated: true , scrollPosition: . top ) https://stackoverflow.com/questions/15330844/uicollectionview-select-and-deselect-issue save indexpath userdefault https://stackoverflow.com/questions/34804294/how-to-save-nsindexpath-locally https://stackoverflow.com/questions/37001643/how-to-add-nsindexpath-to-nsuserdefaults-in-swift navigation presneted viewcontroller dismiss https://stackoverflow.com/questions/31205002/why-is-it-bad-practice-to-have-a-viewcontroller-dismiss-itself indexpath comparison         if selectIndexPath . contains (indexPath) {             cell. isSelect...
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android java 小數點的坑

如果temp  = 12.5                         val newTemp = "%.1f".format(Tempvalue) 原本的寫法是這樣 在法語區 將newTemp.toFloat() 後會掛，因為法語地區的小數點是 , 逗號 所以沒法轉成 12.5  會變成 12,5 後來的解法 將拿到的數字硬轉成 12.5  其他就不管了 val newTemp = "%.1f" . format ( Locale . US , Tempvalue)
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collection view part 5 swift

load plist data https://www.cnblogs.com/gongyuhonglou/p/6029340.html https://blog.csdn.net/sophieDJF/article/details/88247388 https://stackoverflow.com/questions/24045570/how-do-i-get-a-plist-as-a-dictionary-in-swift https://stackoverflow.com/questions/40436895/how-to-read-plist-without-using-nsdictionary-in-swift get specifig key in dictionary https://stackoverflow.com/questions/24640990/how-do-i-get-the-key-at-a-specific-index-from-a-dictionary-in-swift get specifig key with index https://stackoverflow.com/questions/31775724/swift-dictionary-access-via-index get collectionview selection https://stackoverflow.com/questions/21639394/how-to-select-item-in-collectionview-programmatically add button in uinavigationbar https://www.hackingwithswift.com/example-code/uikit/how-to-add-a-bar-button-to-a-navigation-bar child viewcontroller pass data to parent viewcontroller https://stackoverflow.com/questions/39285588/how-to-pass-data-from-child-to-parent-view-controller-in-sw...
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