NSString与int和float以及NSInteger的相互转换

本文介绍在Objective-C编程语言中如何实现NSString与不同数值类型间的相互转换,包括整型、浮点型等,并提供了具体的代码示例。

NSString *stringA = @″;

//1,字符转NSInteger    

  NSInteger k = [stringA integerValue];

//2,NSInteger字符    

 NSString *s = [NSString stringWithFormat:@"%ld",k];

//3

,字符转int              

 int intString = [newString intValue];

//3,int转字符                NSString *stringInt = [NSString stringWithFormat:@"%d",intString];

//4,字符转float             float floatString = [newString floatValue];

//5,float转字符            NSString *stringFloat = [NSString stringWithFormat:@"%f",intString];


请分析代码,并重点解释这个条件 if (i == list.count - 1 && activeSsids.clientTotal != top5ClientNum) - (void)updateViewWithTopClientActiveSSIDs:(DMSDNDashboardActiveSSIDs *)activeSsids { NSMutableArray *chartDataList = [[NSMutableArray alloc] init]; self.totalNumLabel.text = [NSString stringWithFormat:@"%ld",activeSsids.clientTotal]; DDLogInfo(@"%@",[NSString stringWithFormat:@"%ld",activeSsids.clientTotal]) NSArray <DMSSIDClient *> *list = activeSsids.activeSSIDClientList; int64_t top5ClientPercent = 0; NSInteger top5ClientNum = 0; for (int i = 0; i < list.count; i++) { CGFloat percent = ((float)list[i].client / activeSsids.clientTotal)*100; switch (i) { case 0: { top5ClientPercent += percent; top5ClientNum += list[0].client; self.firstSsidView.titleStr = list[0].name; self.firstSsidView.numStr = [NSString stringWithFormat:@"%ld(%d%%)",list[0].client,(int)(percent + 0.5)]; self.firstSsidView.hidden = IsEmptyString(list[0].name); if (percent > 0) { PNPieChartDataItem *item1 = [PNPieChartDataItem dataItemWithValue:percent color:[UIColor tpbPie1]]; [chartDataList addObject:item1]; } } break; case 1: { top5ClientPercent += percent; top5ClientNum += list[1].client; self.secondSsidView.titleStr = list[1].name; self.secondSsidView.numStr = [NSString stringWithFormat:@"%ld(%d%%)",list[1].client,(int)(percent + 0.5)]; self.secondSsidView.hidden = IsEmptyString(list[1].name); if (percent > 0) { PNPieChartDataItem *item2 = [PNPieChartDataItem dataItemWithValue:percent color:[UIColor tpbPie2]]; [chartDataList addObject:item2]; } } break; case 2: { top5ClientPercent += percent; top5ClientNum += list[2].client; self.thirdSsidView.titleStr = list[2].name; self.thirdSsidView.numStr = [NSString stringWithFormat:@"%ld(%d%%)",list[2].client,(int)(percent + 0.5)]; self.thirdSsidView.hidden = IsEmptyString(list[2].name); if (percent > 0) { PNPieChartDataItem *item3 = [PNPieChartDataItem dataItemWithValue:percent color:[UIColor tpbPie3]]; [chartDataList addObject:item3]; } } break; case 3: { top5ClientPercent += percent; top5ClientNum += list[3].client; self.fourthSsidView.titleStr = list[3].name; self.fourthSsidView.numStr = [NSString stringWithFormat:@"%ld(%d%%)",list[3].client,(int)(percent + 0.5)]; self.fourthSsidView.hidden = IsEmptyString(list[3].name); } break; case 4: { top5ClientPercent += percent; top5ClientNum += list[4].client; PNPieChartDataItem *item5 = [PNPieChartDataItem dataItemWithValue:percent color:[UIColor tpbPie5]]; [chartDataList addObject:item5]; self.fifthSsidView.titleStr = list[4].name; self.fifthSsidView.numStr = [NSString stringWithFormat:@"%ld(%d%%)",list[4].client,(int)(percent + 0.5)]; self.fifthSsidView.hidden = IsEmptyString(list[4].name); if (percent > 0) { PNPieChartDataItem *item4 = [PNPieChartDataItem dataItemWithValue:percent color:[UIColor tpbPie4]]; [chartDataList addObject:item4]; } } break; default: // otherTrafficNum += list[i].clientCount; break; } if (i == list.count - 1 && activeSsids.clientTotal != top5ClientNum) { PNPieChartDataItem *item6 = [PNPieChartDataItem dataItemWithValue:(100 - top5ClientPercent) color:[UIColor tpbPieOther]]; [chartDataList addObject:item6]; self.otherSsidView.titleStr = gControllerStatistics.controllerStOthers; self.otherSsidView.numStr = [NSString stringWithFormat:@"%ld(%d%%)",(activeSsids.clientTotal - top5ClientNum),(int)(100 - top5ClientPercent + 0.5)]; self.otherSsidView.hidden = NO; if (percent > 0) { PNPieChartDataItem *item6 = [PNPieChartDataItem dataItemWithValue:(100 - top5ClientPercent) color:[UIColor tpbPieOther]]; [chartDataList addObject:item6]; } } } if (activeSsids.clientTotal <= 0) { PNPieChartDataItem *item1 = [PNPieChartDataItem dataItemWithValue:100 color:[UIColor tpbPie1]]; [chartDataList addObject:item1]; } [self.pieChart updateChartData:chartDataList]; [self.pieChart strokeChartWithRecomputeBlock:nil]; [self makeConstraint]; }
最新发布
11-29
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