0、键盘顶端颜色,文字的修改
textField2.attributedPlaceholder=[[NSAttributedString alloc] initWithString:[[TitleUtility sharedInstance] getTitleWithKey:@"Password"] attributes:@{NSForegroundColorAttributeName: color}];
1.获取view的名字
[NSString stringWithUTF8String:object_getClassName(smallView)
2.删除navgationBar最下面的黑色分割线
(UIImageView)
UIImageView *imgV = [self.navigationController.navigationBar.subviews[0] subviews][0];
imgV.hidden = YES;
3.cell右边标志符的颜色改变
self.accessoryType = UITableViewCellAccessoryCheckmark;
self.tintColor = [UIColor colorWithRed:140.0/255.0 green:197.0/255.0 blue:66.0/255.0 alpha:1];
4.slider滑块固定大小分段滑动
/************分段滑动的方法*****************/
// These number values represent each slider position
numbers = @[@(500), @(1000), @(1500), @(2000), @(2600)];
// slider values go from 0 to the number of values in your numbers array
NSInteger numberOfSteps = ((float)[numbers count] - 1);
slider.maximumValue = numberOfSteps;
slider.minimumValue = 0;
// As the slider moves it will continously call the -valueChanged:
slider.continuous = NO; // NO makes it call only once you let go
[slider addTarget:self
action:@selector(valueChanged:)
forControlEvents:UIControlEventValueChanged];
}
- (void)valueChanged:(UISlider *)sender {
// round the slider position to the nearest index of the numbers array
NSUInteger index = (NSUInteger)(slider.value + 0.5);
[slider setValue:index animated:YES];
NSNumber *number = numbers[index]; // <-- This numeric value you want
NSLog(@"sliderIndex: %i", (int)index);
NSLog(@"number: %@", number);
}
/************分段滑动的方法*****************/
5.设置启动页的时间
[NSThread sleepForTimeInterval:3.0];//设置启动页面时间
6,程序自动关闭
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[theView removeFromSuperview];
exit(0);
});
7.数字用逗号隔开每3位
+(NSString *)countNumAndChangeformat:(NSString *)num
{
int count = 0;
long long int a = num.longLongValue;
while (a != 0)
{
count++;
a /= 10;
}
NSMutableString *string = [NSMutableString stringWithString:num];
NSMutableString *newstring = [NSMutableString string];
while (count > 3) {
count -= 3;
NSRange rang = NSMakeRange(string.length - 3, 3);
NSString *str = [string substringWithRange:rang];
[newstring insertString:str atIndex:0];
[newstring insertString:@"," atIndex:0];
[string deleteCharactersInRange:rang];
}
[newstring insertString:string atIndex:0];
return newstring;
}
8.修改searchBar取消按钮的文字和颜色
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar{
searchBar.showsCancelButton = YES;
NSLog(@"%@",[searchBar subviews]);
[(UIButton *)searchBar.subviews[0] setTintColor:[UIColor whiteColor]];
for(UIView *view in [[[searchBar subviews] objectAtIndex:0] subviews]) {
if([view isKindOfClass:[NSClassFromString(@"UINavigationButton") class]]) {
NSLog(@"%@",view.subviews);
UIButton * cancel =(UIButton *)view;
[cancel setTitle:[[TitleUtility sharedInstance] getTitleWithKey:@"alertCancel"] forState:UIControlStateNormal];
}
}
}
9.数组元素按字母排序
_enStateArr = [_stateDic allKeys];
_enStateArr = [_enStateArr sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2){
NSComparisonResult result = [obj1 compare:obj2];
return result==NSOrderedDescending;
}];
10.控件的晃动
#import <QuartzCore/QuartzCore.h>
-(void)loadShakeAnimationForView:(UIView*)view
{
CALayer *lbl = [view layer];
CGPoint posLbl = [lbl position];
CGPoint y = CGPointMake(posLbl.x-10, posLbl.y);
CGPoint x = CGPointMake(posLbl.x+10, posLbl.y);
CABasicAnimation * animation = [CABasicAnimation animationWithKeyPath:@"position"];
[animation setTimingFunction:[CAMediaTimingFunction
functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
[animation setFromValue:[NSValue valueWithCGPoint:x]];
[animation setToValue:[NSValue valueWithCGPoint:y]];
[animation setAutoreverses:YES];
[animation setDuration:0.08];
[animation setRepeatCount:3];
[lbl addAnimation:animation forKey:nil];
}
11.判断字符串中是否包含某个字符
//判断字符是否包含某字符串；
NSString *string = @"hello,shenzhen,martin";
//字条串是否包含有某字符串
if ([string rangeOfString:@"martin"].location == NSNotFound) {
NSLog(@"string 不存在 martin");
} else {
NSLog(@"string 包含 martin");
}
//字条串开始包含有某字符串
if ([string hasPrefix:@"hello"]) {
NSLog(@"string 包含 hello");
} else {
NSLog(@"string 不存在 hello");
}
//字符串末尾有某字符串；
if ([string hasSuffix:@"martin"]) {
NSLog(@"string 包含 martin");
} else {
NSLog(@"string 不存在 martin");
}
在iOS8以后，还可以用下面的方法来判断是否包含�某字符串：
//在iOS8中你可以这样判断
NSString *str = @"hello world";
if ([str containsString:@"world"]) {
NSLog(@"str 包含 world");
} else {
NSLog(@"str 不存在 world");
}
12.去掉返回手势
// 去掉返回按钮
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"" style:(UIBarButtonItemStyleDone) target:self action:nil];
// 去掉返回手势
if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}
13.字典转换成字符串
- (NSString *)parseParams:(NSDictionary *)params{
NSString *keyValueFormat;
NSMutableString *result = [NSMutableString new];
NSMutableArray *array = [NSMutableArray new];
//实例化一个key枚举器用来存放dictionary的key
NSEnumerator *keyEnum = [params keyEnumerator];
id key;
int i=0;
while (key = [keyEnum nextObject]) {
if (i==0) {
keyValueFormat = [NSString stringWithFormat:@"%@=%@",key,[params valueForKey:key]];
}else
{
keyValueFormat = [NSString stringWithFormat:@"&%@=%@",key,[params valueForKey:key]];
}
// NSLog(@"%@",keyValueFormat);
[result appendString:keyValueFormat];
[array addObject:keyValueFormat];
i++;
}
return result;
}
14.按钮文字居左
button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft; 这行代码，把按钮的内容（控件）
的对齐方式修改为水平左对齐，但是这们会紧紧靠着左边，不好看，所以我们还可以修改属性：
button.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);
这行代码可以让按钮的内容（控件）距离左边10个像素，这样就好看多了
15、四舍五入
-(float)roundFloat:(float)price{
return (floorf(price*100 + 0.5))/100;
}
16.两个时间比较大小
/************
日期格式请传入：2013-08-05 12:12:12；如果修改日期格式，比如：2013-08-05，则将[df setDateFormat:@"yyyy-MM-dd HH:mm:ss"];修改为[df setDateFormat:@"yyyy-MM-dd"];
***********/
+(int)compareDate:(NSString*)date01 withDate:(NSString*)date02{
int ci;
NSDateFormatter *df = [[NSDateFormatter alloc]init];
[df setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *dt1 = [[NSDate alloc]init];
NSDate *dt2 = [[NSDate alloc]init];
dt1 = [df dateFromString:date01];
dt2 = [df dateFromString:date02];
NSComparisonResult result = [dt1 compare:dt2];
switch (result)
{
//date02比date01大
case NSOrderedAscending: ci=1;break;
//date02比date01小
case NSOrderedDescending: ci=-1;break;
//date02=date01
case NSOrderedSame: ci=0;break;
default: NSLog(@"erorr dates %@, %@", dt2, dt1);break;
}
return ci;
}
17.修改输入框提示文字的颜色
UIColor *color = [UIColor whiteColor];
userNameTextField.attributedPlaceholder = [[NSAttributedString alloc]
initWithString:@"请输入手机号"
attributes:@{NSForegroundColorAttributeName : color}];
