修改UIView位置和大小的方式

Question

现在我用的修改UIView的位置和大小，都是要重新构造一个CGRect，然后赋值给UIView的frame，即使是只修改一个x值也要构造一个完整的frame，超级麻烦。
我记得看到过有些人的代码是，可以直接在view上修改某个值，就可以生效

UIView *view = [[UIView alloc] init];
view.width = 320.f;
view.x = 0.f;

但是我看UIView的属性没有这些，而且frame也不允许修改里边的值，想不通为什么。。。
有没有什么可行的简单方式去修改UIView的大小和位置？

Answer 1

给UIView加扩展
你说的那人肯定是扩展里加了setWidth:(CGFloat)width

我是这样加的：
以后用的时候直接#import "UIView+FrameMethods.h"
然后[view setWidth:xxx];或view.width = xxx;

UIView+FrameMethods.h

@interface UIView (FrameMethods)

//Move methods

- (void)moveHorizontal:(CGFloat)horizontal vertical:(CGFloat)vertical;

- (void)moveHorizontal:(CGFloat)horizontal vertical:(CGFloat)vertical addWidth:(CGFloat)widthAdded addHeight:(CGFloat)heightAdded;

- (void)moveToHorizontal:(CGFloat)horizontal toVertical:(CGFloat)vertical;

- (void)moveToHorizontal:(CGFloat)horizontal toVertical:(CGFloat)vertical setWidth:(CGFloat)width setHeight:(CGFloat)height;

//Set width/height

- (void)setWidth:(CGFloat)width height:(CGFloat)height;

- (void)setWidth:(CGFloat)width;

- (void)setHeight:(CGFloat)height;

//Add width/height

- (void)addWidth:(CGFloat)widthAdded addHeight:(CGFloat)heightAdded;

- (void)addWidth:(CGFloat)widthAdded;

- (void)addHeight:(CGFloat)heightAdded;

//Set corner radius

- (void)setCornerRadius:(CGFloat)radius;

- (void)setCornerRadius:(CGFloat)radius borderColor:(UIColor *)borderColor;

- (CGRect)frameInWindow;

@end

UIView+FrameMethods.m

@implementation UIView (FrameMethods)

- (void)moveHorizontal:(CGFloat)horizontal vertical:(CGFloat)vertical
{
    CGRect origionRect = self.frame;
    CGRect newRect = CGRectMake(origionRect.origin.x + horizontal, origionRect.origin.y + vertical, origionRect.size.width, origionRect.size.height);
    self.frame = newRect;
}

- (void)moveHorizontal:(CGFloat)horizontal vertical:(CGFloat)vertical addWidth:(CGFloat)widthAdded addHeight:(CGFloat)heightAdded
{
    CGRect origionRect = self.frame;
    CGRect newRect = CGRectMake(origionRect.origin.x + horizontal,
                                origionRect.origin.y + vertical,
                                origionRect.size.width + widthAdded,
                                origionRect.size.height + heightAdded);
    self.frame = newRect;
}

- (void)moveToHorizontal:(CGFloat)horizontal toVertical:(CGFloat)vertical
{
    CGRect origionRect = self.frame;
    CGRect newRect = CGRectMake(horizontal, vertical, origionRect.size.width, origionRect.size.height);
    self.frame = newRect;
}

- (void)moveToHorizontal:(CGFloat)horizontal toVertical:(CGFloat)vertical setWidth:(CGFloat)width setHeight:(CGFloat)height
{
    CGRect newRect = CGRectMake(horizontal, vertical, width, height);
    self.frame = newRect;
}

- (void)setWidth:(CGFloat)width height:(CGFloat)height
{
    CGRect origionRect = self.frame;
    CGRect newRect = CGRectMake(origionRect.origin.x, origionRect.origin.y, width, height);
    self.frame = newRect;
}

- (void)setWidth:(CGFloat)width
{
    CGRect origionRect = self.frame;
    CGRect newRect = CGRectMake(origionRect.origin.x, origionRect.origin.y, width, origionRect.size.height);
    self.frame = newRect;
}

- (void)setHeight:(CGFloat)height
{
    CGRect origionRect = self.frame;
    CGRect newRect = CGRectMake(origionRect.origin.x, origionRect.origin.y, origionRect.size.width, height);
    self.frame = newRect;
}

- (void)addWidth:(CGFloat)widthAdded addHeight:(CGFloat)heightAdded
{
    CGRect originRect = self.frame;
    CGFloat newWidth = originRect.size.width + widthAdded;
    CGFloat newHeight = originRect.size.height + heightAdded;
    CGRect newRect = CGRectMake(originRect.origin.x, originRect.origin.y, newWidth, newHeight);
    self.frame = newRect;
}

- (void)addWidth:(CGFloat)widthAdded
{
    [self addWidth:widthAdded addHeight:0];
}

- (void)addHeight:(CGFloat)heightAdded
{
    [self addWidth:0 addHeight:heightAdded];
}

- (void)setCornerRadius:(CGFloat)radius
{
    [self setCornerRadius:radius borderColor:[UIColor grayColor]];
}

- (void)setCornerRadius:(CGFloat)radius borderColor:(UIColor *)borderColor
{
    [self.layer setBackgroundColor:[[UIColor whiteColor] CGColor]];
    [self.layer setBorderColor:[borderColor CGColor]];
    [self.layer setBorderWidth:1.0];
    [self.layer setCornerRadius:radius];
    [self.layer setMasksToBounds:YES];
    self.clipsToBounds = YES;
}

- (CGRect)frameInWindow
{
    CGRect frameInWindow = [self.superview convertRect:self.frame 
                                                toView:self.window];
    return frameInWindow;
}

@end