本demo为练手小项目，主要是熟悉目前主流app的架构模式.此项目中采用mvc设计模式,纯代码和少许xib方式实现.主要实现了朋友圈功能和摇一摇功能.
预览效果:
主要重点
1.整体架构
利用uitabbarcontroller和uinavigationcontroller配合实现.其中要注意定义基类,方便整体上的管理,例如对uinavigationcontroller头部的颜色,字体和渲染颜色等设置.以及对uitabbarcontroller的底部的渲染等.
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[self.navigationbarsetbackgroundimage:[uiimageimagenamed:@"dimensional-_code_bg"]forbarmetrics:uibarmetricsdefault];
[self.navigationbarsettitletextattributes:@{
nsforegroundcolorattributename:[uicolor whitecolor]
}];
[self.navigationbarsettintcolor:[uicolor whitecolor]];
2.发现界面和我的界面
利用uitableviewcontroller和plist文件实现界面的展示.实现过程中有采用数据模型或直接利用字典等方式.这里的实现比较简单,就不多说啦.
- (instancetype)initwithdict:(nsdictionary *)dict{
if (self = [super init]) {
[selfsetvaluesforkeyswithdictionary:dict];
}
return self;
}
+ (instancetype)picturewithdict:(nsdictionary *)dict{
return [[self alloc]initwithdict:dict];
}
3.朋友圈功能的实现
这里面主要的难点在于朋友圈首页的下拉刷新效果的实现,和选择照片页的状态重用问题,以及照片的传递和代理的实现等.
朋友圈首页的下拉刷新效果:主要利用transform属性和scrollview的多种滚动状态.
- (void)scrollviewwillbegindragging:(uiscrollview *)scrollview{
self.dragging = yes;
}
- (void)scrollviewdidscroll:(uiscrollview *)scrollview{
if (self.num == 0) {
self.num ++;
return;
}
cgfloat offsety = scrollview.contentoffset.y;
cgfloat angle = -offsety* m_pi / 30;
if (self.dragging == yes) {
if (offsety <= 110) {
self.containerview.y = 10 + offsety;
}
}else {
if (self.currenty < 120) {
self.containerview.y = 10 + offsety;
}
}
self.activityview.transform = cgaffinetransformmakerotation(angle);
}
- (void)scrollviewdidenddragging:(uiscrollview *)scrollviewwilldecelerate:(bool)decelerate{
self.dragging = no;
cgfloat currenty = self.containerview.y;
self.currenty = currenty;
}
- (void)scrollviewdidenddecelerating:(uiscrollview *)scrollview{
[uiviewanimatewithduration:0.25animations:^{
self.containerview.frame = cgrectmake(15, 120, 30, 30);
self.activityview.transform = cgaffinetransformmakerotation(2 * m_pi);
}];
}
其中照片的展示是采用uicollectionviewcontroller来实现的.没有直接调用系统的相册,因此加大了难度.自定义了cell,并采用了代理方式来实现类与类之间的通信.
@protocol yypicturecelldelegate
@optional
- (void)picturecell:(yypicturecell *)cellwithdidclickbtn:(uibutton *)btn;
@end
- (ibaction)clicksurebtn:(uibutton *)sender {
if ([self.delegaterespondstoselector:@selector(picturecell:withdidclickbtn:)]) {
[self.delegatepicturecell:selfwithdidclickbtn:sender];
}
}
- (void)picturecell:(yypicturecell *)cellwithdidclickbtn:(uibutton *)btn{
if ((self.selectedbtn.count == 9) && (!btn.isselected)) {
uialertview *alert = [[uialertview alloc]initwithtitle:nilmessage:@"最多选取9张照片哦,亲!"delegate:nilcancelbuttontitle:@"确定"otherbuttontitles: nil];
[alertshow];
return;
}
btn.selected = !btn.isselected;
nsindexpath *indexpath = [self.collectionviewindexpathforcell:cell];
yypicturemodel *model = self.dataarray[indexpath.row];
if (btn.isselected) {
model.clickedbtn = yes;
[self.selectedbtnaddobject:btn];
[self.selimagearrayaddobject:model];
} else{
model.clickedbtn = no;
[self.selectedbtnremoveobject:btn];
[self.selimagearrayremoveobject:model];
}
if (self.selectedbtn.count > 0) {
self.donebtn.enabled = yes;
self.donebtn.selected = yes;
self.previewbtn.enabled = yes;
self.previewbtn.selected = yes;
}else {
self.donebtn.enabled = no;
self.donebtn.selected = no;
self.previewbtn.enabled = no;
self.previewbtn.selected = no;
}
}
4.摇一摇功能的实现
摇一摇功能的本身实现十分简单,就是调用系统的两个方法即可.难点在于动画效果.其实这里的动画效果也不是很难.主要是计算有点复杂.可能是我在网上搜索到的素材有点不合适.导致要考虑各个控件的frame问题…
//实现摇一摇功能
- (void)motionbegan:(uieventsubtype)motionwithevent:(uievent *)event{
self.upline.hidden = no;
self.downline.hidden = no;
[uiviewanimatewithduration:0.6animations:^{
self.upimageview.y -= 60;
self.upline.y -= 60;
self.downimageview.y += 60;
self.downline.y += 60;
}completion:^(bool finished) {
[uiviewanimatewithduration:0.6animations:^{
self.upimageview.y += 60;
self.upline.y += 60;
self.downimageview.y -= 60;
self.downline.y -= 60;
}completion:^(bool finished) {
self.upline.hidden = yes;
self.downline.hidden = yes;
//弹出搜索框
[self showsearchview];
[self.searchviewperformselector:@selector(removefromsuperview)withobject:nilafterdelay:2.4];
}];
}];
}
//摇一摇结束后
- (void)motionended:(uieventsubtype)motionwithevent:(uievent *)event{
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。
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