IOS 初始化方法的总结（initWithxxx）

初始化方法都是等同：

1.

[NSString stringWithFormat:<#(NSString *), ...#>];

[[NSString alloc]initWithFormat:<#(NSString *), ...#>:<#(NSString *)#>]

2.

[NSArray arrayWithObject:<#(id)#>];

[[NSArray alloc]initWithArray:<#(NSArray *)#>]

3.模型中设计初始化方法：

.h文件中：

3个属性：

@property (nonatomic,copy) NSString *icon;

@property (nonatomic,copy) NSString *desc;

@property (nonatomic,copy) NSString *name;

2个方法＋中包含－：

-(id) initWithDict:(NSDictionary *)dict;

+(id) shopWithDict:(NSDictionary *)dict;

.m文件中：

-(id) initWithDict:(NSDictionary *)dict{

if (self = [super init]) {

self.icon = dict[@"icon"];

self.name = dict[@"name"];

self.desc = dict[@"desc"];

}

return self;

}

+(id) shopWithDict:(NSDictionary *)dict{

//    Shop *s = [[Shop alloc]init];

//    s.icon = dict[@"icon"];

//    s.name = dict[@"name"];

//    s.desc = dict[@"desc"];

return [[self alloc]initWithDict:dict];