IOS7開發～新UI學起

1、UITableView：

UITableViewDelegate 新增內容：

// Use the estimatedHeigh(估算高度)t methods to quickly calcuate guessed values which will allow for fast load times of the table.

// If these methods are implemented, the above -tableView:heightForXXX calls will be deferred until views are ready to be displayed, so more expensive logic can be placed there.

- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath

{

return50;

} // 這個方法先返回一個估算的cell高度

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

{ kPrintInfo

return40;

} 然后這個方法才返回真正的cell高度

這兩個方法同理

- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForHeaderInSection:(NSInteger)section；

- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForFooterInSection:(NSInteger)section；

新增屬性：

@property(nonatomic) CGFloat estimatedRowHeight ;// default is 0, which means there is no estimate

@property(nonatomic) CGFloat estimatedSectionHeaderHeight ;// default is 0, which means there is no estimate

@property(nonatomic) CGFloat estimatedSectionFooterHeight ;// default is 0,

通過新增代理放大不難知道，上述三個新增屬性不難理解了。

// the background color of the section index while not being touched（當section不被觸摸時候的背景顏色）

@property(nonatomic,retain)UIColor *sectionIndexBackgroundColor;

2、UIButton：

UIButton的這個屬性是 IOS6引入的，以前沒注意到：

- (void)setAttributedTitle:(NSAttributedString *)title forState:(UIControlState)stateNS_AVAILABLE_IOS(6_0);// default is nil. title is assumed to be single line

- (NSMutableAttributedString *) getString

{

NSMutableAttributedString *attriString = [[NSMutableAttributedStringalloc]initWithString:@"this is test!"];

//改變this的字體，value必須是一個CTFontRef

[attriString addAttribute:(NSString *)kCTFontAttributeName

value:CFBridgingRelease(CTFontCreateWithName((CFStringRef)[UIFontboldSystemFontOfSize:14].fontName,14,NULL))

range:NSMakeRange(0,4)];

//給this加上下劃線，value可以在指定的枚舉中選擇

[attriString addAttribute:(NSString *)kCTUnderlineStyleAttributeName

value:(id)[NSNumbernumberWithInt:kCTUnderlineStyleDouble]

range:NSMakeRange(0,4)];

return attriString;

}

- (void)viewDidLoad

{

[superviewDidLoad];

[btsetAttributedTitle:[selfgetString]forState:UIControlStateNormal];

}

3、UIDatePicker：

不想說什么了～

4、UISteper：

- (void)viewDidLoad

{

[superviewDidLoad];

UIStepper *myStepper = [[UIStepperalloc] initWithFrame:CGRectMake(0, 10, 320, 50)];

myStepper.backgroundColor = [UIColorredColor];

[myStepper addTarget:self

action:@selector(myAction:)

forControlEvents:UIControlEventValueChanged];

[self.viewaddSubview:myStepper];

}

- (void) myAction:(UIStepper *) sender

{

CFShow((__bridgeCFTypeRef)(@(sender.value)));

}