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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-swift

save data with userdefault
https://stackoverflow.com/questions/25179668/how-to-save-and-read-array-of-array-in-nsuserdefaults-in-swift

find a object in array with index
https://stackoverflow.com/questions/28727845/find-an-object-in-array
https://stackoverflow.com/questions/24028860/how-to-find-index-of-list-item-in-swift
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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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collection view part3 swift

make random color for test, i put in cell background color watch diff https://stackoverflow.com/questions/29779128/how-to-make-a-random-color-with-swift because use CYlayer, i have to remove layer https://stackoverflow.com/questions/10789766/remove-all-sublayers-from-a-view https://stackoverflow.com/questions/37581951/ios-how-to-remove-previously-added-sublayers-of-a-uiview/37581988 alpha gradint with imageview https://stackoverflow.com/questions/11807876/transparent-alpha-gradient-with-core-graphic-iphone swift map and flatmap http://swiftcafe.io/2016/03/28/about-map/ get local date and time https://stackoverflow.com/questions/28404154/swift-get-local-date-and-time swift dictionary basic https://stackoverflow.com/questions/27313242/how-to-append-elements-into-dictionary-in-swift add 1 day to NSDate https://stackoverflow.com/questions/5067785/how-do-i-add-1-day-to-an-nsdate get keys from dictionay https://stackoverflow.com/questions/26386093/array-from-dictionary...
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js30 d27 drag跑馬燈

https://github.com/richardhsieh18/js30/tree/master/course27 CSS transform: scale(0.98);  =>  transform: scale(1); js     isDown = true;     slider.classList.add('active');     startX = e.pageX - slider.offsetLeft;     scrollLeft = slider.scrollLeft;   });     if(!isDown) return; //stop the function from running     e.preventDefault();     const x = e.pageX - slider.offsetLeft;     const walk = (x - startX) * 3;     slider.scrollLeft = scrollLeft - walk;   });
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