iOS自定义时间滚动选择控件

本文实例为大家分享了ios自定义时间滚动选择控件的具体代码，供大家参考，具体内容如下

1.先上自定义的控件：

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

/**

* 滚轮选择器

* author lh

* data 2016/8/20 17:26

*/

public class wheelview extends view {

public static final string tag = "wheelview";

/**

* 自动回滚到中间的速度

*/

public static final float speed = 2;

/**

* 除选中item外，上下各需要显示的备选项数目

*/

public static final int show_size = 1;

private context context;

private list<string> itemlist;

private int itemcount;

/**

* item高度

*/

private int itemheight = 50;

/**

* 选中的位置，这个位置是mdatalist的中心位置，一直不变

*/

private int currentitem;

private paint selectpaint;

private paint mpaint;

// 画背景图中单独的画笔

private paint centerlinepaint;

private float centery;

private float centerx;

private float mlastdowny;

/**

* 滑动的距离

*/

private float mmovelen = 0;

private boolean isinit = false;

private selectlistener mselectlistener;

private timer timer;

private mytimertask mtask;

handler updatehandler = new handler() {

@override

public void handlemessage(message msg) {

if (math.abs(mmovelen) < speed) {

// 如果偏移量少于最少偏移量

mmovelen = 0;

if (null != timer) {

timer.cancel();

timer.purge();

timer = null;

}

if (mtask != null) {

mtask.cancel();

mtask = null;

performselect();

}

} else {

// 这里mmovelen / math.abs(mmovelen)是为了保有mmovelen的正负号，以实现上滚或下滚

mmovelen = mmovelen - mmovelen / math.abs(mmovelen) * speed;

}

invalidate();

}

};

public wheelview(context context) {

super(context);

init(context);

}

public wheelview(context context, attributeset attrs) {

super(context, attrs);

init(context);

}

public void setonselectlistener(selectlistener listener) {

mselectlistener = listener;

}

public void setwheelstyle(int style) {

itemlist = wheelstyle.getitemlist(context, style);

if (itemlist != null) {

itemcount = itemlist.size();

resetcurrentselect();

invalidate();

} else {

log.i(tag, "item is null");

}

public void setwheelitemlist(list<string> itemlist) {

this.itemlist = itemlist;

if (itemlist != null) {

itemcount = itemlist.size();

resetcurrentselect();

} else {

log.i(tag, "item is null");

}

private void resetcurrentselect() {

if (currentitem < 0) {

currentitem = 0;

}

while (currentitem >= itemcount) {

currentitem--;

}

if (currentitem >= 0 && currentitem < itemcount) {

invalidate();

} else {

log.i(tag, "current item is invalid");

}

public int getitemcount() {

return itemcount;

}

/**

* 选择选中的item的index

* author lh

* data 2016/9/4 11:09

*/

public void setcurrentitem(int selected) {

currentitem = selected;

resetcurrentselect();

}

public int getcurrentitem() {

return currentitem;

}

@override

protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {

super.onmeasure(widthmeasurespec, heightmeasurespec);

int mviewheight = getmeasuredheight();

int mviewwidth = getmeasuredwidth();

centerx = (float) (mviewwidth / 2.0);

centery = (float) (mviewheight / 2.0);

isinit = true;

invalidate();

}

private void init(context context) {

this.context = context;

timer = new timer();

itemlist = new arraylist<>();

mpaint = new paint(paint.anti_alias_flag);

mpaint.setstyle(style.fill);

mpaint.settextalign(align.center);

mpaint.setcolor(getresources().getcolor(r.color.wheel_unselect_text));

int size1 = (int) (supportdisplay.getlayoutscale()*22+0.5);

mpaint.settextsize(size1);

selectpaint = new paint(paint.anti_alias_flag);

selectpaint.setstyle(style.fill);

selectpaint.settextalign(align.center);

selectpaint.setcolor(getresources().getcolor(r.color.color_1a1a1a));

int size2 = (int) (supportdisplay.getlayoutscale()*24+0.5);

selectpaint.settextsize(size2);

centerlinepaint = new paint(paint.anti_alias_flag);

centerlinepaint.setstyle(style.fill);

centerlinepaint.settextalign(align.center);

centerlinepaint.setcolor(getresources().getcolor(r.color.wheel_unselect_text));

// 绘制背景

setbackground(null);

}

@override

protected void ondraw(canvas canvas) {

super.ondraw(canvas);

if (isinit) {

drawdata(canvas);

}

private void drawdata(canvas canvas) {

// 先绘制选中的text再往上往下绘制其余的text

if (!itemlist.isempty()) {

// 绘制中间data

drawcentertext(canvas);

// 绘制上方data

for (int i = 1; i < show_size + 1; i++) {

drawothertext(canvas, i, -1);

}

// 绘制下方data

for (int i = 1; i < show_size + 1; i++) {

drawothertext(canvas, i, 1);

}

private void drawcentertext(canvas canvas) {

// text居中绘制，注意baseline的计算才能达到居中，y值是text中心坐标

float y = centery + mmovelen;

fontmetricsint fmi = selectpaint.getfontmetricsint();

float baseline = (float) (y - (fmi.bottom / 2.0 + fmi.top / 2.0));

canvas.drawtext(itemlist.get(currentitem), centerx, baseline, selectpaint);

}

/**

* 绘制文本

* author lh

* data 2016/9/4 11:10

* @param canvas 画布

* @param position 距离mcurrentselected的差值

* @param type 1表示向下绘制，-1表示向上绘制

*/

private void drawothertext(canvas canvas, int position, int type) {

int index = currentitem + type * position;

if (index >= itemcount) {

index = index - itemcount;

}

if (index < 0) {

index = index + itemcount;

}

string text = itemlist.get(index);

int itemheight = getheight() / (show_size * 2 + 1);

float d = itemheight * position + type * mmovelen;

float y = centery + type * d;

fontmetricsint fmi = mpaint.getfontmetricsint();

float baseline = (float) (y - (fmi.bottom / 2.0 + fmi.top / 2.0));

canvas.drawtext(text, centerx, baseline, mpaint);

}

@override

public void setbackground(drawable background) {

background = new drawable() {

@override

public void draw(canvas canvas) {

itemheight = getheight() / (show_size * 2 + 1);

int width = getwidth();

canvas.drawline(0, itemheight, width, itemheight, centerlinepaint);

canvas.drawline(0, itemheight * 2, width, itemheight * 2, centerlinepaint);

centerlinepaint.setcolor(getresources().getcolor(r.color.wheel_bg));

rect toprect = new rect(0, 0, width, itemheight);

canvas.drawrect(toprect, centerlinepaint);

rect bottomrect = new rect(0, itemheight * 2, width, itemheight * 3);

canvas.drawrect(bottomrect, centerlinepaint);

}

@override

public void setalpha(int alpha) {

}

@override

public void setcolorfilter(colorfilter cf) {

}

@override

public int getopacity() {

return 0;

}

};

super.setbackground(background);

}

@override

public boolean ontouchevent(motionevent event) {

switch (event.getactionmasked()) {

case motionevent.action_down:

dodown(event);

break;

case motionevent.action_move:

domove(event);

break;

case motionevent.action_up:

doup();

break;

default:

break;

}

return true;

}

private void dodown(motionevent event) {

if (mtask != null) {

mtask.cancel();

mtask = null;

}

mlastdowny = event.gety();

}

private void domove(motionevent event) {

mmovelen += (event.gety() - mlastdowny);

if (mmovelen > itemheight / 2) {

// 往下滑超过离开距离

mmovelen = mmovelen - itemheight;

currentitem--;

if (currentitem < 0) {

currentitem = itemcount - 1;

}

} else if (mmovelen < -itemheight / 2) {

// 往上滑超过离开距离

mmovelen = mmovelen + itemheight;

currentitem++;

if (currentitem >= itemcount) {

currentitem = 0;

}

mlastdowny = event.gety();

invalidate();

}

private void doup() {

// 抬起手后mcurrentselected的位置由当前位置move到中间选中位置

if (math.abs(mmovelen) < 0.0001) {

mmovelen = 0;

return;

}

if (mtask != null) {

mtask.cancel();

mtask = null;

}

if (null == timer) {

timer = new timer();

}

mtask = new mytimertask(updatehandler);

timer.schedule(mtask, 0, 10);

}

class mytimertask extends timertask {

handler handler;

public mytimertask(handler handler) {

this.handler = handler;

}

@override

public void run() {

handler.sendmessage(handler.obtainmessage());

}

private void performselect() {

if (mselectlistener != null) {

mselectlistener.onselect(currentitem, itemlist.get(currentitem));

} else {

log.i(tag, "null listener");

}

public interface selectlistener {

void onselect(int index, string text);

}

2.然后是时间选择控件的样式工具类

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

/**

* 时间选择样式

* author lh

* data 2016/9/4 11:05

*/

public class wheelstyle {

public static final int minyear = 1980;

public static final int maxyear = 2020;

/**

* wheel style hour

*/

public static final int style_hour = 1;

/**

* wheel style minute

*/

public static final int style_minute = 2;

/**

* wheel style year

*/

public static final int style_year = 3;

/**

* wheel style month

*/

public static final int style_month = 4;

/**

* wheel style day

*/

public static final int style_day = 5;

/**

* wheel style simple day

*/

public static final int style_simple_day = 6;

/**

* wheel style set warn

*/

public static final int style_set_warn = 7;

/**

* wheel style work answer

*/

public static final int style_work_answer = 8;

private wheelstyle() {

}

public static list<string> getitemlist(context context, int style) {

if (style == style_hour) {

return createhourstring();

} else if (style == style_minute) {

return createminutestring();

} else if (style == style_year) {

return createyearstring();

} else if (style == style_month) {

return createmonthstring();

} else if (style == style_day) {

return createdaystring();

} else if (style == style_simple_day) {

return createsimpledaystring();

} else if (style == style_set_warn) {

return createsetwarntimestring();

} else {

throw new illegalargumentexception("style is illegal");

}

private static list<string> createhourstring() {

list<string> wheelstring = new arraylist<>();

for (int i = 0; i < 24; i++) {

wheelstring.add(string.format("%02d" + "时", i));

}

return wheelstring;

}

private static list<string> createminutestring() {

list<string> wheelstring = new arraylist<>();

for (int i = 0; i < 60; i++) {

wheelstring.add(string.format("%02d" + "分", i));

}

return wheelstring;

}

private static list<string> createyearstring() {

list<string> wheelstring = new arraylist<>();

for (int i = minyear; i <= maxyear; i++) {

wheelstring.add(integer.tostring(i));

}

return wheelstring;

}

private static list<string> createmonthstring() {

list<string> wheelstring = new arraylist<>();

for (int i = 1; i <= 12; i++) {

wheelstring.add(string.format("%02d" + "月", i));

}

return wheelstring;

}

private static list<string> createdaystring() {

list<string> wheelstring = new arraylist<>();

for (int i = 1; i <= 31; i++) {

wheelstring.add(string.format("%02d" + "日", i));

}

return wheelstring;

}

private static list<string> createsimpledaystring() {

list<string> wheelstring = new arraylist<>();

wheelstring.add("一天后");

wheelstring.add("两天后");

wheelstring.add("三天后");

return wheelstring;

}

private static list<string> createsetwarntimestring() {

list<string> wheelstring = new arraylist<>();

wheelstring.add("30分钟");

wheelstring.add("60分钟");

wheelstring.add("90分钟");

wheelstring.add("120分钟");

return wheelstring;

}

/**

* 计算闰月

*

* @param month

* @return

*/

private static boolean isleapmonth(int month) {

return month == 1 || month == 3 || month == 5 || month == 7

|| month == 8 || month == 10 || month == 12;

}

/**

* 计算闰年

*

* @param year

* @return

*/

private static boolean isleapyear(int year) {

return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;

}

3.使用的xml

iOS自定义时间滚动选择控件

相关文章

快网idc优惠网

相关文章

微信

快网idc优惠网

QQ交流群