iOS Object-C 常用到的代码块（持续更新）

YYModel相关的：

• 声明自定义类参数类型

+ (NSDictionary *)modelContainerPropertyGenericClass {
    return @{@"<#arrayName#>" : [<#ClassName#> class]};
}

• 黑名单（如果实现了该方法，则处理过程中会忽略该列表内的所有属性）

+ (NSArray *)modelPropertyBlacklist {
  return @[@"<#propertyName#>"];
}

• 白名单(如果实现了该方法，则处理过程中不会处理该列表外的属性。)

+ (NSArray *)modelPropertyWhitelist {
  return @[@"<#property#>"];
}

系统功能

• 拨打电话

NSMutableString *str=[[NSMutableString alloc] initWithFormat:@"[telprompt://%@](telprompt://%25@)",@"<#phone#>"];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]]

• 手机系统版本：9.1

NSString* phoneVersion = [[UIDevice currentDevice] systemVersion];

• 手机类型：iPhone 6(方法在下面)

NSString* phoneModel = [self iphoneType];

- (NSString *)iphoneType {
需要导入头文件：#import 
struct utsname systemInfo;
uname(&systemInfo);
NSString *platform = [NSString stringWithCString:systemInfo.machine encoding:NSASCIIStringEncoding];
if ([platform isEqualToString:@"iPhone1,1"]) return @"iPhone 2G";
if ([platform isEqualToString:@"iPhone1,2"]) return @"iPhone 3G";
if ([platform isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS";
if ([platform isEqualToString:@"iPhone3,1"]) return @"iPhone 4";
if ([platform isEqualToString:@"iPhone3,2"]) return @"iPhone 4";
if ([platform isEqualToString:@"iPhone3,3"]) return @"iPhone 4";
if ([platform isEqualToString:@"iPhone4,1"]) return @"iPhone 4S";
if ([platform isEqualToString:@"iPhone5,1"]) return @"iPhone 5";
if ([platform isEqualToString:@"iPhone5,2"]) return @"iPhone 5";
if ([platform isEqualToString:@"iPhone5,3"]) return @"iPhone 5c";
if ([platform isEqualToString:@"iPhone5,4"]) return @"iPhone 5c";
if ([platform isEqualToString:@"iPhone6,1"]) return @"iPhone 5s";
if ([platform isEqualToString:@"iPhone6,2"]) return @"iPhone 5s";
if ([platform isEqualToString:@"iPhone7,1"]) return @"iPhone 6 Plus";
if ([platform isEqualToString:@"iPhone7,2"]) return @"iPhone 6";
if ([platform isEqualToString:@"iPhone8,1"]) return @"iPhone 6s";
if ([platform isEqualToString:@"iPhone8,2"]) return @"iPhone 6s Plus";
if ([platform isEqualToString:@"iPhone8,4"]) return @"iPhone SE";
if ([platform isEqualToString:@"iPhone9,1"]) return @"iPhone 7";
if ([platform isEqualToString:@"iPhone9,2"]) return @"iPhone 7 Plus";
if ([platform isEqualToString:@"iPod1,1"])   return @"iPod Touch 1G";
if ([platform isEqualToString:@"iPod2,1"])   return @"iPod Touch 2G";
if ([platform isEqualToString:@"iPod3,1"])   return @"iPod Touch 3G";
if ([platform isEqualToString:@"iPod4,1"])   return @"iPod Touch 4G";
if ([platform isEqualToString:@"iPod5,1"])   return @"iPod Touch 5G";
if ([platform isEqualToString:@"iPad1,1"])   return @"iPad 1G";
if ([platform isEqualToString:@"iPad2,1"])   return @"iPad 2";
if ([platform isEqualToString:@"iPad2,2"])   return @"iPad 2";
if ([platform isEqualToString:@"iPad2,3"])   return @"iPad 2";
if ([platform isEqualToString:@"iPad2,4"])   return @"iPad 2";
if ([platform isEqualToString:@"iPad2,5"])   return @"iPad Mini 1G";
if ([platform isEqualToString:@"iPad2,6"])   return @"iPad Mini 1G";
if ([platform isEqualToString:@"iPad2,7"])   return @"iPad Mini 1G";
if ([platform isEqualToString:@"iPad3,1"])   return @"iPad 3";
if ([platform isEqualToString:@"iPad3,2"])   return @"iPad 3";
if ([platform isEqualToString:@"iPad3,3"])   return @"iPad 3";
if ([platform isEqualToString:@"iPad3,4"])   return @"iPad 4";
if ([platform isEqualToString:@"iPad3,5"])   return @"iPad 4";
if ([platform isEqualToString:@"iPad3,6"])   return @"iPad 4";
if ([platform isEqualToString:@"iPad4,1"])   return @"iPad Air";
if ([platform isEqualToString:@"iPad4,2"])   return @"iPad Air";
if ([platform isEqualToString:@"iPad4,3"])   return @"iPad Air";
if ([platform isEqualToString:@"iPad4,4"])   return @"iPad Mini 2G";
if ([platform isEqualToString:@"iPad4,5"])   return @"iPad Mini 2G";
if ([platform isEqualToString:@"iPad4,6"])   return @"iPad Mini 2G";
if ([platform isEqualToString:@"i386"])      return @"iPhone Simulator";
if ([platform isEqualToString:@"x86_64"])    return @"iPhone Simulator";
return platform;
}

• 手机系统：iPhone OS

NSString * iponeM = [[UIDevice currentDevice] systemName];

• 电池电量

CGFloat batteryLevel=[[UIDevice currentDevice] batteryLevel];

UIKit

• UIAlertController

    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"<#title#>" message:@"<#content#>" preferredStyle:UIAlertControllerStyleAlert];
    [alertController addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        
    }]];
    [alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        
    }]];
    [self presentViewController:alertController animated:YES completion:nil];

• UILabel初始化

UILabel *label = ({
    UILabel *label = [[UILabel alloc] init];
    label.font = [UIFont systemFontOfSize:13];
    label.textColor = [UIColor whiteColor];
    label;
})

• 修改UITextField中Placeholder的文字颜色

[textField setValue:[UIColor redColor] forKeyPath:@"_placeholderLabel.textColor"]; 

其他

• 单例初始化

+ (instancetype)sharedInstance {
    static <#ClassName#> *instance;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [[<#ClassName#> alloc] init];
    });
    return instance;
}

• JSON字符串转化为字典

+ (NSDictionary *)dictionaryWithJsonString:(NSString *)jsonString
{
    if (jsonString == nil) {
        return nil;
    }
    
    NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
    NSError *err;
    NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData
                                                        options:NSJSONReadingMutableContainers
                                                          error:&err];
    if(err)
    {
        NSLog(@"json解析失败：%@",err);
        return nil;
    }
    return dic;
}

• 随机颜色

#define random(r, g, b, a) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:(a)/255.0]
#define randomColor random(arc4random_uniform(256), arc4random_uniform(256), arc4random_uniform(256), arc4random_uniform(256))

• 枚举

typedef enum NSUInteger {
    <#enumNameType#> ,
    <#enumNameType#>
} <#enumName#>;

• 阿拉伯数字转中文格式

+(NSString *)translation:(NSString *)arebic
{ 
  NSString *str = arebic;
  NSArray *arabic_numerals = @[@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"0"];
  NSArray *chinese_numerals = @[@"一",@"二",@"三",@"四",@"五",@"六",@"七",@"八",@"九",@"零"];
  NSArray *digits = @[@"个",@"十",@"百",@"千",@"万",@"十",@"百",@"千",@"亿",@"十",@"百",@"千",@"兆"];
  NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:chinese_numerals forKeys:arabic_numerals];
 
  NSMutableArray *sums = [NSMutableArray array];
  for (int i = 0; i < str.length; i ++) {
    NSString *substr = [str substringWithRange:NSMakeRange(i, 1)];
    NSString *a = [dictionary objectForKey:substr];
    NSString *b = digits[str.length -i-1];
    NSString *sum = [a stringByAppendingString:b];
    if ([a isEqualToString:chinese_numerals[9]])
    {
      if([b isEqualToString:digits[4]] || [b isEqualToString:digits[8]])
      {
        sum = b;
        if ([[sums lastObject] isEqualToString:chinese_numerals[9]])
        {
          [sums removeLastObject];
        }
      }else
      {
        sum = chinese_numerals[9];
      }
 
      if ([[sums lastObject] isEqualToString:sum])
      {
        continue;
      }
    }
 
    [sums addObject:sum];
  }
 
  NSString *sumStr = [sums componentsJoinedByString:@""];
  NSString *chinese = [sumStr substringToIndex:sumStr.length-1];
  NSLog(@"%@",str);
  NSLog(@"%@",chinese);
  return chinese;
}

• 颜色转图片

- (UIImage*)createImageWithColor:(UIColor*)color {
    CGRect rect = CGRectMake(0.0f,0.0f,1.0f,1.0f);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);
    UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return theImage;
}