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Ionic 2 header shrink
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import {ViewChild, Injectable} from "@angular/core"; | |
import {Platform} from 'ionic-angular'; | |
@Injectable() | |
export class Shrink { | |
scrollPosition: number = 0; | |
lastScrollTop: number = 0; | |
style: any; | |
height: number; | |
constructor(private platform: Platform) { | |
this.platform = platform; | |
if (this.platform.is('ios')) { | |
this.height = 44; | |
} else { | |
//android | |
this.height = 56; | |
} | |
} | |
returnStyle() { | |
return this.style; | |
} | |
init(content) { | |
content.addScrollListener((event) => { | |
this.scrollPosition = event.target.scrollTop; | |
if (this.scrollPosition > this.lastScrollTop && this.scrollPosition >= 5) { | |
// Scrolling Down | |
this.style = { 'transform': 'translateY(-' + this.height + 'px)', 'transition': 'all 0.3s linear' } | |
} | |
else { | |
// Scrolling up | |
this.style = { 'transform': 'translateY(0px)', 'transition': 'all 0.3s linear' } | |
} | |
this.lastScrollTop = this.scrollPosition; | |
}); | |
} | |
} |
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