iOS:以前笔记，未整理版。太多了，先放着吧。。。。。。。
1、**************************************************************** 单例共享 ****************************************************************
单例 共享信息
.m
static OneT *newone = nil;
+(instancetype)shalldata
{
if (newone == nil)
{
newone = [[OneT alloc]init];
newone.data_zone = [NSMutableArray array];
}
return newone;
}
调用：
OneT *one = [OneT shalldata];
OneT *two = [OneT shalldata];
2、**************************************************************** 日期 ****************************************************************
日期时间
//美国的时间
NSDate *date = [[NSDate alloc]init];
//时区
NSTimeZone *myZone = [NSTimeZone systemTimeZone];
//算时差 加上时差
NSInteger interValTimer = [myZone secondsFromGMTForDate:date];
NSDate *localDate = [date dateByAddingTimeInterval:interValTimer];
NSLog(@"%@",localDate);
//明天
NSDate *date2 = [NSDate dateWithTimeIntervalSinceNow:24*60*60];
//昨天
NSDate *date2 = [NSDate dateWithTimeIntervalSinceNow:-ADAY];
NSLog(@"date2 = %@",date2);
//1970年
NSDate *date2 = [NSDate dateWithTimeIntervalSince1970:0];
NSLog(@"%@",date2);
//参考日期2001年
NSDate *date3 = [NSDate dateWithTimeIntervalSinceReferenceDate:0];
NSLog(@"%@",date3);
//nsdate -> nsstring 类型转换
NSDate *date1 = [NSDate date];
1.
NSString *date1str = date1.description; //美国的时间
2
NSDateFormatter *dateFormat1 = [[NSDateFormatter alloc]init];
2.1
[dateFormat1 setDateFormat:@"yyyy年MM月dd日 EEEE HH mm ss zz"];
2.2
[dateFormat1 setDateStyle:NSDateFormatterShortStyle];
[dateFormat1 setTimeStyle:NSDateFormatterMediumStyle];
NSString *datestr2 = [dateFormat1 stringFromDate:date1];
NSLog(@"datestr2 = %@",datestr2);
//获取所有时区的名字
NSArray *timeZoneNames = [NSTimeZone knownTimeZoneNames];
//新建一个时区
NSTimeZone *newZone = [NSTimeZone timeZoneWithName:@"Pacific/Fiji"];
//新建一个时间格式
NSDateFormatter *dateFormat2 = [[NSDateFormatter alloc]init];
//设置该时区
[dateFormat2 setTimeZone:newZone];
//设置时间格式
[dateFormat2 setDateFormat:@"yyyy年MM月dd日 EEEE HH:mm:ss zz"];
//打印
NSString *dateString = [dateFormat2 stringFromDate:[NSDate date]];
NSLog(@"dateString = %@",dateString);
//字符串转date
NSString *dateStr4 = @"2016年07月27日 星期三 20:16:10 GMT+12";
NSDate *date4 = [dateFormat2 dateFromString:dateStr4];
NSLog(@"%@",date4);
3、**************************************************************** 其他 ****************************************************************
NSRange newrange = NSMakeRange(1,5);
NSValue *newvalue = [NSValue valueWithRange:newrange];
NSLog(@"%@",newvalue);
NSArray *newarray = [NSArray arrayWithObjects:newvalue, nil];
NSLog(@"%@",newarray);
NSRange newrange2 = [newvalue rangeValue];
NSLog(@"%lu,%lu",newrange2.location,newrange2.length);
//封装自定义的结构体
struct MyPoint
{
int x;
int y;
};
struct MyPoint mypoint;
mypoint.x = 10;
mypoint.y = 100;
NSValue *val2 = [NSValue value:&mypoint withObjCType:@encode(struct MyPoint)];
NSLog(@"%@",val2);
struct MyPoint mypoint2;
[val2 getValue:&mypoint2];
NSLog(@"mypoint2.x = %d,mypoint2.y = %d",mypoint2.x,mypoint2.y);
9、
@interface class_A:NSObject
…
@end
@implementation class_A
…
@end
@property int x;
@synthesize x;
[MyA setNumb:5]; 即使实例变量是小写，这个set后也要大写
n=[MyA numb];
[A B] 等价 A.B
[self 该.m文件的方法]，找不到再去父类找
与文件.h.m同名
@interface class_A:NSObject
…
@end
@interface class_B:class_A
…
@ens
继承里，class_B里的方法的可以用
[self A的方法]
[self A的变量]
需要某文件的某些方法，可以用
@class xxx.h
小
如果xxx.h的某些方法访问不了，如init,还是要
#import xxx.h
大
重复包含的，其中一个.h可以用@class xxx（不用写.h），对应.m要#import xxx.h
同名方法优先使用class_B的方法
同名的方法，会自动判断[A set_value:(int)x]的类，如判断出A
id x；
x=任意变量、class类
@try
{
…
}
@catch
{
…
}
@finally
{
…
}
还有的@throw
存储
NSString *path = @"/Users/etcxm/test.plist";
[dic writeToFile:path atomically:YES];
NSArray *A_data_R = [NSArray array];
A_data_R = [NSArray arrayWithContentsOfFile:S_add];
2、
可变数组 copy 赋值给不可变数组。
==========================================================================
//编码
NSData *new_data = [s_text dataUsingEncoding:NSUTF8StringEncoding];
//解码
NSString *new_string = [[NSString alloc]initWithData:new_data encoding:NSUTF8StringEncoding];
==========================================================================
//沙盒路径
NSHomeDirectory()
//工程目录
[NSBundle mainBundle]
==========================================================================
NSArray *data = [NSArray arrayWithObjects:@"zhang3",@"li4", nil];
NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"ceshi83.txt"];
BOOL status = [NSKeyedArchiver archiveRootObject:data toFile:path];
NSLog(@"%@",status?@"成功":@"失败");
NSArray *r_data = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
NSLog(@"%@",r_data);
6、
instancetype:返回与初始化类相同的类型。
-（instancetype)initWith…
{
self=[super init];
if(self)
{
…
}
return self;
}
-（class_A *）initwithone:(int)a other:(int)b
{
self=[super init];
if(self)
{
[self seta:a b:b ] ;
}
return self;
}
+(instancetype)robotWithName:(NSString*)r_name andage:(int)r_age
{
#if 0
return [[self alloc]initWithName:(NSString*)r_name andage:(int)r_age];
#else
Robot *new_R = [[Robot alloc]initWithName:r_name andage:r_age];
return new_R;
#endif
}
==========================================================================
标签
- (void)createImageLabel { float gap = 15; float gap2 = 15; float hangWidth = 0; NSMutableArray <NSMutableArray*> *dataSource_section = [NSMutableArray arrayWithCapacity:0]; NSMutableArray<imageLabelHandle*> *dataSource_item = [NSMutableArray arrayWithCapacity:0]; hangWidth = gap + gap; NSLog(@"int-%lf",hangWidth); for (int i = 0; i< imageLabelArray.count; i++) { imageLabelHandle *handle = imageLabelArray[i]; CGFloat tag_width = handle.label_width;//[ToolManager getWidthWithText:handle.t_label_name font:[UIFont systemFontOfSize:13]]; NSLog(@"curr-%lf",tag_width); if (hangWidth + tag_width > App_Frame_Width) { hangWidth = gap + gap + tag_width + gap2; [dataSource_section addObject:dataSource_item]; dataSource_item = [NSMutableArray arrayWithCapacity:0]; [dataSource_item addObject:imageLabelArray[i]]; // NSLog(@"yiman-%lf",hangWidth); }else{ hangWidth += tag_width + gap2; // NSLog(@"wei-%lf",hangWidth); [dataSource_item addObject:imageLabelArray[i]]; } } if ( [dataSource_section.lastObject isEqualToArray:dataSource_item] == NO ) { [dataSource_section addObject:dataSource_item]; } // float width = 70; float height = 30; float x = 0;//(SCREEN_WIDTH - 280)/5.; float y = 50; // float blank = (SCREEN_WIDTH -280)/5.; for (int i= 0; i< dataSource_section.count; i++) { x = gap; y = 50 + i * (height + 10); CGFloat tempWidth = 0; for (imageLabelHandle *handle in dataSource_section[i]) { tempWidth += handle.label_width; } gap2 = (App_Frame_Width - tempWidth - gap - gap)/([dataSource_section[i] count]-1); for (int j= 0; j< [dataSource_section[i] count]; j++) { imageLabelHandle *handle = dataSource_section[i][j]; UIButton *imageLButton = [YLBasicView createButton:IColor(38, 38, 38) text:handle.t_label_name backColor:IColor(220, 220, 220) cordius:3. font:[UIFont systemFontOfSize:13]]; imageLButton.frame = CGRectMake(x, y, handle.label_width, height); imageLButton.titleLabel.textAlignment = NSTextAlignmentCenter; imageLButton.tag = j; [imageLButton addTarget:self action:@selector(imageButtonBeClicked:) forControlEvents:UIControlEventTouchUpInside]; [whiteView addSubview:imageLButton]; x += handle.label_width + gap2; } } allHeight = y + height + 20; whiteView.frame = CGRectMake(0, SCREEN_HEIGHT, SCREEN_WIDTH, allHeight ); }
