OC重点API

NSString

1     - (NSArray *)componentsSeparatedByString:(NSString *)separator      分割

2     - (NSString *)stringByAppendingString:(NSString *)aString 拼接

3     - (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString *)replacement  删除某字符串,就是把某串替换为空

4      stringWithFormat   初始化字符串

 

– substringFromIndex: (下标  最后) 

– substringWithRange: (位置  长度)  

– substringToIndex:( 开头   下标 )

– capitalizedString       首字母大写

– lowercaseString          转换成小写

– uppercaseString        转换成大写

– hasPrefix:              是否某字符开头

– hasSuffix:               是否某字符结尾

– isEqualToString:         字符串是否相等

– isEqual:               对象是否相等

 

(可变)无返回值,原串上拼接 

– appendFormat:

– appendString:

NSArray

+ arrayWithObjects:

– objectAtIndex: 

– firstObject

– lastObject

– containsObject:

– indexOfObject:

– sortedArrayUsingSelector:

(可变)

+ arrayWithCapacity:

– addObject:

– removeObjectAtIndex:

– removeAllObjects

– removeLastObject

– insertObject:atIndex:

– exchangeObjectAtIndex:withObjectAtIndex:

– replaceObjectAtIndex:withObject:

+ dictionaryWithObjects:forKeys:

– allKeys

– allValues

– objectForKey:

– keysSortedByValueUsingSelector:

(可变)

+ dictionaryWithCapacity:

– setObject:forKey:

– removeObjectForKey:

– removeAllObjects

– removeObjectsForKeys:

+ numberWithInt:

+ intvalue

– initWithFrame:

clipsToBounds

• superview  property
• subviews  property
• window  property
• – addSubview:

– removeFromSuperview

– bringSubviewToFront:

– sendSubviewToBack:

- viewWithTag

+ boldSystemFontOfSize: 18号粗体

textAlignment

numberOfLines

textColor  property

borderStyle  property

placeholder  property

clearButtonMode  property

secureTextEntry

+ buttonWithType:

– setTitle:forState:

– titleForState:

– setBackgroundImage:forState:

- (void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents