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USAMI Kosuke
April 26, 2016
Programming
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790
SnapKit
http://kanmoba.connpass.com/event/28416/
USAMI Kosuke
April 26, 2016
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Transcript
SnapKit Auto Layout Library USAMI Kosuke Fenrir Inc.
View Layout for iOS & OS X » Auto Layout
Λ͏ » Auto Layout ΛΘͳ͍ » ͪͳΈʹʮAuto Layout ʯͰ͢
Auto Layout » Storyboard ্Ͱઃఆ » Source Code ্Ͱهड़ »
ͪͳΈʹʮStoryboard ʯͰ͢ » ͱ͍͑ɺݻࣥͤͣʹॊೈʹߟ͍͑ͨ
How to code Auto Layout ? » View Λ Storyboard
Ͱͳ͘ίʔυͰ࣮͍ͨ͜͠ͱ͕͋Δ » ͦͷͱ͖ Auto Lauout ίʔυͰ࣮͍ͨ͠ » ͦΜͳͱ͖ʹͲ͏͢Δʁ » ɾɾɾͱ͍͏ͷ͕ࠓճͷຊͰ͢ɻ
Auto Layout Coding
How to code Constraint ? Auto Layout ΛίʔυͰॻ͘ͱͭ·Γɾɾɾ » Constraintʢ੍ʣΛίʔυͰॻ͘ʹʁ
ͱ͍͏͜ͱ
iOS & OS X SDK » NSLayoutConstraint class » Visual
Format Language » NSLayoutAnchor class
NSLayoutConstraint NSLayoutConstraint( item: myView, attribute: .Left, relatedBy: .Equal, toItem: view,
attribute: . Left, multiplier: 1.0, constant: 0.0).active = true » ͬͱ Basic ͳํ๏ » ͻͱͭͷ؆୯ͳ੍ͷͨΊʹ͜Ε͚ͩॻ͔ͳ͍ͱ͍͚ͳ͍
Visual Format Language let constraints = NSLayoutConstraint.constraintsWithVisualFormat( "|-[myView]-|", options:.AlignAllTop ,
metrics: nil, views: ["myView" : myView]) NSLayoutConstraint.activateConstraints(constraints) » "|-[myView]-|" : ΤϥʔϩάͰΑ͘ݟ͔͚ΔΞϨ » ੍ͷจ๏ΛίϯύΠϥ͕νΣοΫͯ͘͠Εͳ͍
NSLayoutAnchor myView.leftAnchor .constraintEqualToAnchor(view.layoutGuides.leftAnchor) .active = true » iOS 9 and
later / OS X 10.11 and later » ͕݅߹͏ͳΒɺΘΓͱΞϦͩͱࢥ͏ͷͰݕ౼͍ͨ͠
ͬͱ͍͍खஈ͕ͳ͍͔ʁ » ඪ४ͷํ๏Ͱॻ͖ʹ͍͘ͷ͕ݱঢ় » Auto Layout ΛίʔυͰॻ͘ͳɺͱݴΘΕͯෆࢥٞͰͳ͍
SnapKit
SnapKit » http://snapkit.io/ » Auto Layout Library » For Swift
2 » ެࣜͰ Auto Layout DSL ͱݴ͍ͬͯΔ͕ɺSwift ͷจ๏ͦͷͷ
ิ : Masonry » Ҏલ Masonry ͱ͍͏ Objective-C ϥΠϒϥϦͩͬͨ »
SnapKit = Masonry ͷ Swift ൛ » Masonry ࣌ Objective-C ͬΆ͘ͳͯ͘ DSL ײ͕ڧ͔ͬͨ
SnapKit myView.snp_makeConstraints { (make) in make.left.equalTo(view) } » NSLayoutAnchor ʹ͍͚ۙͲɺΑΓγϯϓϧ
» ඇ Auto Layout Ͱ frame Λૢ࡞͢Δײ֮ʹҊ֎͍ۙ
Exapmle 1 : Basics myView.snp_makeConstraints { (make) in make.top.equalTo(view).offset(20) make.left.equalTo(view).offset(20)
make.bottom.equalTo(view).offset(-20) make.right.equalTo(view).offset(-20) } » top / left / bottom / right / width / height / centerX / centerY
More simplify myView.snp_makeConstraints { (make) in make.edges.equalTo(view).inset(UIEdgeInsetsMake(20, 20, 20, 20))
} » edges / size / center
Exapmle 2 : ViewAttribute subview1.snp_makeConstraints { (make) in make.top.equalTo(snp_topLayoutGuideBottom) make.left.right.equalTo(view)
make.height.equalTo(40) } subview2.snp_makeConstraints { (make) in make.top.equalTo(subview1.snp_bottom) make.left.right.equalTo(view) make.bottom.equalTo(snp_bottomLayoutGuideTop) }
Exapmle 3 : References var heightConstraint: Constraint! subview.snp_makeConstraints { (make)
in heightConstraint = make.height.equalTo(0).constraint } heightConstraint.updateOffset(60)
❤ SnapKit » Swift Ͱࣗવʹॻ͚Δ » Auto Layout ͷ੍ΛίʔυͰॻ͘ͷ͕ۤʹͳΒͳ͍ »
ʮͲ͏ॻ͔͘ʯͰͳ͘ʮͲΜͳ੍ΛΉ͔ʯͱ͍͏ϩδοΫʹूத Ͱ͖Δ
❤ SnapKit